criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <iostream>
using namespace std;
int main(void){
    double r;
    double pi;
    cin>>r;
    pi =3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989;
    cout << std::fixed;
    cout << std::setprecision(2)<<r*r*pi<<" "<<2*r*pi<<endl;
    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: 'setprecision' is not a member of 'std'
    9 |     cout << std::setprecision(2)<<r*r*pi<<" "<<2*r*pi<<endl;
      |                  ^~~~~~~~~~~~
a.cc:2:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    1 | #include <iostream>
  +++ |+#include <iomanip>
    2 | using namespace std;
Language: C++

#include <iostream>
#include <iomanip> // 追加
#include <cmath>  // 追加
using namespace std;

int main(){
  double r;
  cin>>r;　　　　　　// 浮動小数点数で読む
  
  double pi =acos(-1);   // 円周率
  cout<<fixed<<setprecision(6);
  double area = r * r * pi;
  double cir =(r+r) * pi;
  cout<<area<<" "<<cir<<endl;
}


Compiler output:
a.cc:8:10: error: extended character 　 is not valid in an identifier
    8 |   cin>>r;　　　　　　// 浮動小数点数で読む
      |          ^
a.cc:8:10: error: extended character 　 is not valid in an identifier
a.cc:8:10: error: extended character 　 is not valid in an identifier
a.cc:8:10: error: extended character 　 is not valid in an identifier
a.cc:8:10: error: extended character 　 is not valid in an identifier
a.cc:8:10: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:8:10: error: '\U00003000\U00003000\U00003000\U00003000\U00003000\U00003000' was not declared in this scope
    8 |   cin>>r;　　　　　　// 浮動小数点数で読む
      |          ^~~~~~~~~~~~
a.cc:12:25: error: 'pi' was not declared in this scope
   12 |   double area = r * r * pi;
      |                         ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
    scanf(%f, r);
    printf("%f %f, pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:7:12: warning: missing terminating " character
    7 |     printf("%f %f, pi*r*r, 2.0*pi*r);
      |            ^
a.cc:7:12: error: missing terminating " character
    7 |     printf("%f %f, pi*r*r, 2.0*pi*r);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:6:11: error: expected primary-expression before '%' token
    6 |     scanf(%f, r);
      |           ^
a.cc:6:12: error: 'f' was not declared in this scope
    6 |     scanf(%f, r);
      |            ^
a.cc:8:5: error: expected primary-expression before 'return'
    8 |     return 0;
      |     ^~~~~~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
    scanf("%f", r);
    printf("%f %f, pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:7:12: warning: missing terminating " character
    7 |     printf("%f %f, pi*r*r, 2.0*pi*r);
      |            ^
a.cc:7:12: error: missing terminating " character
    7 |     printf("%f %f, pi*r*r, 2.0*pi*r);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:8:5: error: expected primary-expression before 'return'
    8 |     return 0;
      |     ^~~~~~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
    scanf("%f", r);
    printf("%f %f", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:21: error: 'pi' was not declared in this scope
    7 |     printf("%f %f", pi*r*r, 2.0*pi*r);
      |                     ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
    scanf("%f", &r);
    printf("%f %f", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:21: error: 'pi' was not declared in this scope
    7 |     printf("%f %f", pi*r*r, 2.0*pi*r);
      |                     ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
　　double pi = 3.141593;
    scanf("%f", &r);
    printf("%f %f", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　double pi = 3.141593;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000\U00003000double' was not declared in this scope
    6 | 　　double pi = 3.141593;
      | ^~~~~~~~~~
a.cc:8:21: error: 'pi' was not declared in this scope
    8 |     printf("%f %f", pi*r*r, 2.0*pi*r);
      |                     ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
　　double pi = 3.1415926535897932;
    scanf("%f", &r);
    printf("%f %f", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　double pi = 3.1415926535897932;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000\U00003000double' was not declared in this scope
    6 | 　　double pi = 3.1415926535897932;
      | ^~~~~~~~~~
a.cc:8:21: error: 'pi' was not declared in this scope
    8 |     printf("%f %f", pi*r*r, 2.0*pi*r);
      |                     ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
　　double pi = 3.1415926535897932;
    scanf("%f", &r);
    printf("%f %f\n", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　double pi = 3.1415926535897932;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000\U00003000double' was not declared in this scope
    6 | 　　double pi = 3.1415926535897932;
      | ^~~~~~~~~~
a.cc:8:23: error: 'pi' was not declared in this scope
    8 |     printf("%f %f\n", pi*r*r, 2.0*pi*r);
      |                       ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
　　double pi = 3.1415926535897932;
    scanf("%lf", &r);
    printf("%f %f\n", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　double pi = 3.1415926535897932;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000\U00003000double' was not declared in this scope
    6 | 　　double pi = 3.1415926535897932;
      | ^~~~~~~~~~
a.cc:8:23: error: 'pi' was not declared in this scope
    8 |     printf("%f %f\n", pi*r*r, 2.0*pi*r);
      |                       ^~
Language: C++

#include<stdio.h>

int main(void)
{
    double r;
　　double pi = 3.1415926535897932;
    scanf("%lf", &r);
    printf("%lf %lf\n", pi*r*r, 2.0*pi*r);
    return 0;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　　double pi = 3.1415926535897932;
      | ^
a.cc:6:1: error: extended character 　 is not valid in an identifier
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000\U00003000double' was not declared in this scope
    6 | 　　double pi = 3.1415926535897932;
      | ^~~~~~~~~~
a.cc:8:25: error: 'pi' was not declared in this scope
    8 |     printf("%lf %lf\n", pi*r*r, 2.0*pi*r);
      |                         ^~
Language: C++

#include<iostream>

using namespace std;

int main(){
  double r,S,L;

  cin >> r;

  S = r * r * 3.141592653589;
  L = 2 * r 3.141592653589;

  cout << S <<" " << L << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:12: error: expected ';' before numeric constant
   11 |   L = 2 * r 3.141592653589;
      |            ^~~~~~~~~~~~~~~
      |            ;
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
#include<cstdio>
#include<cmath>
using namespace std;
#define loop(i,a,b) for(int i=a;i<b;i++)
#define rep(i,a) loop(i,0,a)
#define PI acon(-1)
int main(){
double n;
cin>>n;
printf("%.10f %.10f\n",n*n*PI,2*n*PI);

}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'acon' was not declared in this scope; did you mean 'acos'?
    9 | #define PI acon(-1)
      |            ^~~~
a.cc:13:28: note: in expansion of macro 'PI'
   13 | printf("%.10f %.10f\n",n*n*PI,2*n*PI);
      |                            ^~
Language: C++

#include<iostream>
#include <cmath>

using names*ace std;

int main() {
    double r;
    cin >> r;
    cout << r*r*pi << " " << 2*pi*r << endl;
}

Compiler output:
a.cc:4:7: error: expected nested-name-specifier before 'names'
    4 | using names*ace std;
      |       ^~~~~
a.cc: In function 'int main()':
a.cc:8:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |     cin >> r;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |     cout << r*r*pi << " " << 2*pi*r << endl;
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:9:17: error: 'pi' was not declared in this scope
    9 |     cout << r*r*pi << " " << 2*pi*r << endl;
      |                 ^~
a.cc:9:40: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |     cout << r*r*pi << " " << 2*pi*r << endl;
      |                                        ^~~~
      |                                        std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
#include <cmath>

using namespace std;

int main() {
    double r;
    cin >> r;
    cout << r*r*pi << " " << 2*pi*r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'pi' was not declared in this scope
    9 |     cout << r*r*pi << " " << 2*pi*r << endl;
      |                 ^~
Language: C++

#include<stdio.h>
#include<math.h>

int r;

int main(){
  scanf("%d", &r):
  printf("%lf %lf\n", r*r*M_PI, 2.*r*M_PI);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: expected ';' before ':' token
    7 |   scanf("%d", &r):
      |                  ^
      |                  ;
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;

#define PI = 3.1415926535;

int main()
{
  double r;
  cin >> r;
  printf("%.6f %.6f\n",2*PI*r,PI*r*r);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: expected primary-expression before '=' token
    5 | #define PI = 3.1415926535;
      |            ^
a.cc:11:26: note: in expansion of macro 'PI'
   11 |   printf("%.6f %.6f\n",2*PI*r,PI*r*r);
      |                          ^~
a.cc:11:28: error: invalid type argument of unary '*' (have 'double')
   11 |   printf("%.6f %.6f\n",2*PI*r,PI*r*r);
      |                            ^~
a.cc:5:12: error: expected primary-expression before '=' token
    5 | #define PI = 3.1415926535;
      |            ^
a.cc:11:31: note: in expansion of macro 'PI'
   11 |   printf("%.6f %.6f\n",2*PI*r,PI*r*r);
      |                               ^~
a.cc:11:33: error: invalid type argument of unary '*' (have 'double')
   11 |   printf("%.6f %.6f\n",2*PI*r,PI*r*r);
      |                                 ^~
Language: C++

#include <cstdio>
using namespace std;

int main (void)
{
	int r;
	double l, s, m, pai=3.14159265358979;

	scanf("%d", &r);

	s = 2.0 * r * pai;
	m = r * r * pai;

	printf("%.6lf %.6lf\n", m, s);
	return 0;
}
}

Compiler output:
a.cc:17:1: error: expected declaration before '}' token
   17 | }
      | ^
Language: C++

#include <cstdio>
using namespace std;

int main (void)
{
	double s, m, r;
	double pai = 3.14159265358979

	scanf("%lf", &r);

	s = r * r * pai;
	m = 2 * r * pai;

	printf("%.6f %.6f\n", s, m);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: expected ',' or ';' before 'scanf'
    9 |         scanf("%lf", &r);
      |         ^~~~~
Language: C++

#include <cstdio>
#include <iostream>
#include <cmath>
using namespace std;

int main() {
	double r;
	cin >> r;
	double s, k;
	double p = acos(-1);
	s = p * a * a;
	printf("%.10lf ", s);
	k = p * 2 * a;
	printf("%.10lf\n", k);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: 'a' was not declared in this scope
   11 |         s = p * a * a;
      |                 ^
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <map>
#include <cmath>
#include <string>
#include <sstream>
#include <iomanip>
#include <complex>
using namespace std;

#define ll long long
#define vvi vector< vector<int> >
#define vi vector<int>
#define All(X) X.begin(),X.end()
#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define pb push_back
#define pii pair<int,int>
#define mp make_pair
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
#define pi 3.14159265359
#define shosu(X) fixed() << setprecision(X)
int main(){
	double n;
	cin >> n;
	cout << shosu(10) << n*n*pi << " " << n*2.0*pi << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:23: error: too few arguments to function 'std::ios_base& std::fixed(ios_base&)'
   26 | #define shosu(X) fixed() << setprecision(X)
      |                  ~~~~~^~
a.cc:30:17: note: in expansion of macro 'shosu'
   30 |         cout << shosu(10) << n*n*pi << " " << n*2.0*pi << endl;
      |                 ^~~~~
In file included from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/ios_base.h:1104:3: note: declared here
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
Language: C++

#include <iostream>
#include <iomanip>

int main(){
    using namespace std;
    double const PI = acos( -1.0f );

    double r = 0.0f;
    cin >> r;

    double size = r * r * PI;
    double cir  = (r + r) * PI;

    cout << fixed << setprecision(6) << size << " " << cir << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:23: error: 'acos' was not declared in this scope
    6 |     double const PI = acos( -1.0f );
      |                       ^~~~
Language: C++

#include <iostream>
#include <iomanip>

int main(){
    double const PI = std::acos( -1.0f );

    double r = 0.0f;
    std::cin >> r;

    double size = r * r * PI;
    double cir  = (r + r) * PI;

    std::cout << std::fixed << std::setprecision(6) << size << " " << cir 
              << std::endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:28: error: 'acos' is not a member of 'std'
    5 |     double const PI = std::acos( -1.0f );
      |                            ^~~~
Language: C++

#include<stdio.h>
#include<math.h>

int main()
{
	int r;
	scanf_s("%d", &r);
	printf("%f %f\n", r*r*M_PI, 2 * r*M_PI);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    7 |         scanf_s("%d", &r);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <stdio.h>

int main(void)
{
	int a;

	scanf("%d", &a);

	printf("%d %d", a*a*3.14159, a*2*3.14159)


	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: expected ';' before 'getchar'
    9 |         printf("%d %d", a*a*3.14159, a*2*3.14159)
      |                                                  ^
      |                                                  ;
......
   12 |         getchar();
      |         ~~~~~~~
Language: C++

#include <stdio.h>

int main(void)
{
	double a;

	scanf("%d", &a);

	printf("%d %d", a*a*3.14159, a*2*3.14159)


	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: expected ';' before 'getchar'
    9 |         printf("%d %d", a*a*3.14159, a*2*3.14159)
      |                                                  ^
      |                                                  ;
......
   12 |         getchar();
      |         ~~~~~~~
Language: C++

#include <stdio.h>

int main(void)
{
	double a;

	scanf("%f", &a);

	printf("%f %f", a*a*3.14159, a*2*3.14159)


	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: expected ';' before 'getchar'
    9 |         printf("%f %f", a*a*3.14159, a*2*3.14159)
      |                                                  ^
      |                                                  ;
......
   12 |         getchar();
      |         ~~~~~~~
Language: C++

#include <stdio.h>

int main(void)
{
	double a;

	scanf("%d", &a);

	printf("%f %f", a*a*3.14159, a*2*3.14159)


	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: expected ';' before 'getchar'
    9 |         printf("%f %f", a*a*3.14159, a*2*3.14159)
      |                                                  ^
      |                                                  ;
......
   12 |         getchar();
      |         ~~~~~~~
Language: C++

#include <stdio.h>

int main(void)
{
	int a;

	scanf("%d", &a);

	printf("%f %f", a*a*3.14159, a*2*3.14159)


	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:50: error: expected ';' before 'getchar'
    9 |         printf("%f %f", a*a*3.14159, a*2*3.14159)
      |                                                  ^
      |                                                  ;
......
   12 |         getchar();
      |         ~~~~~~~
Language: C++

#include<stdio.h>
int main(void)
{
	double p,me,syu,r1;
	int r;
	scanf("%d",&r);
	p=3.14159265358979;
	r1=r
	
	me=r1*r1*p;
	syu=(r1+r1)*p;
	printf("%1f %1f",me,syu);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: expected ';' before 'me'
    8 |         r1=r
      |             ^
      |             ;
    9 | 
   10 |         me=r1*r1*p;
      |         ~~
Language: C++

//circle

#include<iostream>
#include<cstdio>

using namespace std;

int main()
{
double r,h,s,p=3.1415926535;

cin>>r;

printff("%.8f %.8f\n",p*r*r,2*p*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:1: error: 'printff' was not declared in this scope; did you mean 'printf'?
   14 | printff("%.8f %.8f\n",p*r*r,2*p*r);
      | ^~~~~~~
      | printf
Language: C++

#include<stdio.h>

int main(void)
{

double r,l,s;

scanf("%lf",&r);

l=2*r*3.141592653589;
s=3.141592653589*r*r;

printf("%f %f\n",l,f);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:20: error: 'f' was not declared in this scope
   13 | printf("%f %f\n",l,f);
      |                    ^
Language: C++

#include<cstdio>
#include<iostream>
using namespace std;
int main()
{
int a;
cin >> a;
printf("%l %l", (double)pi * pi * a, (double)2 * a * pi);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:25: error: 'pi' was not declared in this scope
    8 | printf("%l %l", (double)pi * pi * a, (double)2 * a * pi);
      |                         ^~
Language: C++

#include<stdio.h>

int main(){

pi = 3.1415926535;

printf("%lf %lf\n", pi*r*r , 2*pi*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'pi' was not declared in this scope
    5 | pi = 3.1415926535;
      | ^~
a.cc:7:24: error: 'r' was not declared in this scope
    7 | printf("%lf %lf\n", pi*r*r , 2*pi*r);
      |                        ^
Language: C++

#include<stdio.h>

int main(){

pi =  3. 1415926535 8979323846;

printf("%lf %lf\n", pi*r*r , 2*pi*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'pi' was not declared in this scope
    5 | pi =  3. 1415926535 8979323846;
      | ^~
a.cc:7:24: error: 'r' was not declared in this scope
    7 | printf("%lf %lf\n", pi*r*r , 2*pi*r);
      |                        ^
Language: C++

#include<stdio.h>

int main(){

pi =  3.14159265358979323846;

printf("%lf %lf\n", pi*r*r , 2*pi*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'pi' was not declared in this scope
    5 | pi =  3.14159265358979323846;
      | ^~
a.cc:7:24: error: 'r' was not declared in this scope
    7 | printf("%lf %lf\n", pi*r*r , 2*pi*r);
      |                        ^
Language: C++

#include<stdio.h>

int main(){

double pi =  3.14159265358979323846;

printf("%lf %lf\n", pi*r*r , 2*pi*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: 'r' was not declared in this scope
    7 | printf("%lf %lf\n", pi*r*r , 2*pi*r);
      |                        ^
Language: C++

#include<stdio.h>

int main(){

double pi =  3.141592653589;

printf("%lf %lf\n", pi*r*r , 2*pi*r);

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: 'r' was not declared in this scope
    7 | printf("%lf %lf\n", pi*r*r , 2*pi*r);
      |                        ^
Language: C++

#include <iostream>
#include <stdio.h>
using namespace std;

int main(){
	double r;
	//const double PI = 3.141592653589;
	scanf ("%lf",&r);
	//cin >> r ;
	//cout << int(a/b) << " " << (a % b) << " " << fixed << (double)a / (double)b << endl;
	printf("%lf %lf\n",r * 2 * 3.141592653589, r* r* 3.141592653589);
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:12:18: error: expected '}' at end of input
   12 |         return 0;
      |                  ^
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

#include <cstdio>
const double PI = 3.1415926535;
int main(){
	double r;
	cin>>r;
        printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin>>r;
      |         ^~~
a.cc:6:46: error: request for member 'r' in 'PI', which is of non-class type 'const double'
    6 |         printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
      |                                              ^
Language: C++

#include <cstdio>
#inclide <iostream>
const double PI = 3.1415926535;
int main(){
	double r;
	cin>>r;
        printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
	return 0;
}

Compiler output:
a.cc:2:2: error: invalid preprocessing directive #inclide; did you mean #include?
    2 | #inclide <iostream>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin>>r;
      |         ^~~
a.cc:7:46: error: request for member 'r' in 'PI', which is of non-class type 'const double'
    7 |         printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
      |                                              ^
Language: C++

#include <cstdio>
#include <iostream>
const double PI = 3.1415926535;
int main(){
	double r;
	cin>>r;
        printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         cin>>r;
      |         ^~~
      |         std::cin
In file included from a.cc:2:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:46: error: request for member 'r' in 'PI', which is of non-class type 'const double'
    7 |         printf("%.6f %.6f\n" , r*r*PI , 2*PI.r);
      |                                              ^
Language: C++

#include <cstdio>
#include <iostream>
const double PI = 3.1415926535;
int main(){
	double r;
	cin>>r;
        printf("%.6f %.6f\n" , r*r*PI , 2*PI*r);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         cin>>r;
      |         ^~~
      |         std::cin
In file included from a.cc:2:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

#include<stdio.h>
#define PI 3.14159265359u
  
int main(void){
  double r;
  
  scanf("%lf",&r);
  printf("%lf %lf",r*r*PI,2*r*PI);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:12: error: unable to find numeric literal operator 'operator""u'
    2 | #define PI 3.14159265359u
      |            ^~~~~~~~~~~~~~
a.cc:8:24: note: in expansion of macro 'PI'
    8 |   printf("%lf %lf",r*r*PI,2*r*PI);
      |                        ^~
a.cc:2:12: error: unable to find numeric literal operator 'operator""u'
    2 | #define PI 3.14159265359u
      |            ^~~~~~~~~~~~~~
a.cc:8:31: note: in expansion of macro 'PI'
    8 |   printf("%lf %lf",r*r*PI,2*r*PI);
      |                               ^~
Language: C++

#include<cstdio>
main(){
 int r;
 double pi = 3.14
 scanf("%d",&r);
 printf("%f %f\n",pi*r*r,2*pi*r);
}

Compiler output:
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:5:2: error: expected ',' or ';' before 'scanf'
    5 |  scanf("%d",&r);
      |  ^~~~~
Language: C++

import math
r = map(float, input())
a = r * r * pi
b = 2 * r * pi
print "%f %f" & (a,b)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

import math
r = map(float, raw_input())
a = r * r * pi
b = 2 * r * pi
print "%f %f" & (a,b)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

import math
r = map(float, raw_input())
a = r * r * math.pi
b = 2 * r * math.pi
print "%f %f" & (a,b)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

import math
r = map(float, raw_input())
a = r * r * math.pi
b = 2 * r * math.pi
print "%f %f" % (a,b)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

import math
r = float(raw_input())
a = r * r * math.pi
b = 2 * r * math.pi
print "%f %f" % (a,b)

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <cstdio>

int main(void)
{
int r
scanf("%d",&r);
printf("%f %f\n", 3.1415926535323*r*r, 3.1415926535323*2*r);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: expected initializer before 'scanf'
    6 | scanf("%d",&r);
      | ^~~~~
a.cc:7:35: error: 'r' was not declared in this scope
    7 | printf("%f %f\n", 3.1415926535323*r*r, 3.1415926535323*2*r);
      |                                   ^
Language: C++

#include <cstdio>

int main(void)
{
char s[500];
double r;
scanf("%s",s);
r=atof(s);
printf("%f %f\n", 3.1415926535323*r*r, 3.1415926535323*2*r);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'atof' was not declared in this scope
    8 | r=atof(s);
      |   ^~~~
Language: C++

#include <stdio.h>
#include <math.h>
   
int main(){

  int val = 0;

    scanf("%d", &val);

    printf("%f\n", val * val * PI);

  return 0;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:32: error: 'PI' was not declared in this scope
   10 |     printf("%f\n", val * val * PI);
      |                                ^~
Language: C++

#define _USE_MATH_DEFINES
#include <math.h>
#include <iostream>
#include <cstdio>

int main(){
double r;

std::cin >> r;

std::printf("%.5f %.5f", r*r*M_PI, 2*r*M_PI)

Compiler output:
a.cc: In function 'int main()':
a.cc:11:45: error: expected ';' at end of input
   11 | std::printf("%.5f %.5f", r*r*M_PI, 2*r*M_PI)
      |                                             ^
      |                                             ;
a.cc:11:45: error: expected '}' at end of input
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

#define _USE_MATH_DEFINES
#include <math.h>
#include <iostream>
#include <cstdio>

int main(){
double r;

std::cin >> r;

std::printf("%.5f %.5f", r*r*M_PI;, 2*r*M_PI;)

Compiler output:
a.cc: In function 'int main()':
a.cc:11:34: error: expected ')' before ';' token
   11 | std::printf("%.5f %.5f", r*r*M_PI;, 2*r*M_PI;)
      |            ~                     ^
a.cc:11:35: error: expected primary-expression before ',' token
   11 | std::printf("%.5f %.5f", r*r*M_PI;, 2*r*M_PI;)
      |                                   ^
a.cc:11:46: error: expected primary-expression before ')' token
   11 | std::printf("%.5f %.5f", r*r*M_PI;, 2*r*M_PI;)
      |                                              ^
a.cc:11:47: error: expected '}' at end of input
   11 | std::printf("%.5f %.5f", r*r*M_PI;, 2*r*M_PI;)
      |                                               ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

#define _USE_MATH_DEFINES
#include <math.h>
#include <iostream>
#include <cstdio>

int main(){
double r;

std::cin >> r;

std::printf("%.5f %.5f", r*r*M_PI, 2*r*M_PI)
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:45: error: expected ';' before '}' token
   11 | std::printf("%.5f %.5f", r*r*M_PI, 2*r*M_PI)
      |                                             ^
      |                                             ;
   12 | }
      | ~
Language: C++

#include<iostream>
#include<stdio.h>

using namespace std;
int main(){
double a,b,c,d,e;
cin>>a;
b=a*2;
c=a*a;
d=b*3.14159265;
e=c*3.14159265;
printf("%6f",e);
cout<<" ";
printf("%6f",d);
cout<<endl;
return 0;34.
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: expected ';' before '}' token
   16 | return 0;34.
      |             ^
      |             ;
   17 | }
      | ~
Language: C++

#include <iostream>
#include <math.h>
#include <stdio.h>

int main(){
    double pi = 3.1415926535897932384626433832795028841971;
    double r;
    
    cin >> r;
    printf("%7lf %7lf\n",r*r*pi,r*2*pi);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 |     cin >> r;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

#define _USE_MATH_DEFINES
#include <cmath>
#include <iostream>
#include <cstdio>
using namespace std;

void crcl(double r){
  double S = r*r*M_PI, shu??????2*r*M_PI;
  
  cout << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:27: error: expected initializer before '?' token
    8 |   double S = r*r*M_PI, shu??????2*r*M_PI;
      |                           ^
a.cc:10:23: error: 'shu' was not declared in this scope
   10 |   cout << S << " " << shu << endl;
      |                       ^~~
Language: C++

#define _USE_MATH_DEFINES
#include <cmath>
#include <iostream>
#include <cstdio>
using namespace std;

void crcl(double r){
  double S = r*r*M_PI; double shu??????2*r*M_PI;
  
  cout << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:34: error: expected initializer before '?' token
    8 |   double S = r*r*M_PI; double shu??????2*r*M_PI;
      |                                  ^
a.cc:10:23: error: 'shu' was not declared in this scope
   10 |   cout << S << " " << shu << endl;
      |                       ^~~
Language: C++

#define _USE_MATH_DEFINES
#include <cmath>
#include <iostream>
#include <cstdio>
using namespace std;

void crcl(double r){
  double S = r*r*3.14159; double shu??????2*r*3. 14159;
  
  cout << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:37: error: expected initializer before '?' token
    8 |   double S = r*r*3.14159; double shu??????2*r*3. 14159;
      |                                     ^
a.cc:10:23: error: 'shu' was not declared in this scope
   10 |   cout << S << " " << shu << endl;
      |                       ^~~
Language: C++


#include <iostream>
#include <cstdio>
using namespace std;

void crcl(double r){
  double S = r*r*3.14159; double shu??????2*r*3. 14159;
  
  cout << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:7:37: error: expected initializer before '?' token
    7 |   double S = r*r*3.14159; double shu??????2*r*3. 14159;
      |                                     ^
a.cc:9:23: error: 'shu' was not declared in this scope
    9 |   cout << S << " " << shu << endl;
      |                       ^~~
Language: C++


#include <iostream>
using namespace std;

void crcl(double r){
  double S, shu; 
  S = r*r*3.14159;
  shu??????2*r*3.14159;
  
  cout << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:7: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |       ^
a.cc:8:8: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |        ^
a.cc:8:9: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |         ^
a.cc:8:10: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |          ^
a.cc:8:11: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |           ^
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
Language: C++


#include <iostream>
using namespace std;

void crcl(double r){
  double S, shu; 
  S = r*r*3.14159;
  shu??????2*r*3.14159;
  
  cout <<  setprecision(5) << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:7: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |       ^
a.cc:8:8: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |        ^
a.cc:8:9: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |         ^
a.cc:8:10: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |          ^
a.cc:8:11: error: expected primary-expression before '?' token
    8 |   shu??????2*r*3.14159;
      |           ^
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:8:23: error: expected ':' before ';' token
    8 |   shu??????2*r*3.14159;
      |                       ^
      |                       :
a.cc:8:23: error: expected primary-expression before ';' token
a.cc:10:12: error: 'setprecision' was not declared in this scope
   10 |   cout <<  setprecision(5) << S << " " << shu << endl;
      |            ^~~~~~~~~~~~
a.cc:3:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    2 | #include <iostream>
  +++ |+#include <iomanip>
    3 | using namespace std;
Language: C++


#include <iostream>
using namespace std;

void crcl(double r)}
  double S, shu; 
  S = r*r*3.14159;
  shu ???2*r*3.14159;
  
  cout << setprecision(5) << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc:5:20: error: expected initializer before '}' token
    5 | void crcl(double r)}
      |                    ^
a.cc:5:20: error: expected declaration before '}' token
a.cc:7:3: error: 'S' does not name a type
    7 |   S = r*r*3.14159;
      |   ^
a.cc:8:3: error: 'shu' does not name a type
    8 |   shu ???2*r*3.14159;
      |   ^~~
a.cc:10:3: error: 'cout' does not name a type
   10 |   cout << setprecision(5) << S << " " << shu << endl;
      |   ^~~~
a.cc:11:1: error: expected declaration before '}' token
   11 | }
      | ^
a.cc: In function 'int main()':
a.cc:17:3: error: 'crcl' was not declared in this scope
   17 |   crcl(r);
      |   ^~~~
Language: C++


#include <iostream>
using namespace std;

void crcl(double r){
  double S, shu; 
  S=r*r*3.14159;
  shu???2*r*3.14159;
  
  cout << setprecision(5) << S << " " << shu << endl;
}

int main(){
  double r;

  cin >> r;
  crcl(r);
}

Compiler output:
a.cc: In function 'void crcl(double)':
a.cc:8:7: error: expected primary-expression before '?' token
    8 |   shu???2*r*3.14159;
      |       ^
a.cc:8:8: error: expected primary-expression before '?' token
    8 |   shu???2*r*3.14159;
      |        ^
a.cc:8:20: error: expected ':' before ';' token
    8 |   shu???2*r*3.14159;
      |                    ^
      |                    :
a.cc:8:20: error: expected primary-expression before ';' token
a.cc:8:20: error: expected ':' before ';' token
    8 |   shu???2*r*3.14159;
      |                    ^
      |                    :
a.cc:8:20: error: expected primary-expression before ';' token
a.cc:8:20: error: expected ':' before ';' token
    8 |   shu???2*r*3.14159;
      |                    ^
      |                    :
a.cc:8:20: error: expected primary-expression before ';' token
a.cc:10:11: error: 'setprecision' was not declared in this scope
   10 |   cout << setprecision(5) << S << " " << shu << endl;
      |           ^~~~~~~~~~~~
a.cc:3:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    2 | #include <iostream>
  +++ |+#include <iomanip>
    3 | using namespace std;
Language: C++

#include <stdio.h>
#include <math.h>

main()
{
int r;
scanf("%d",&r);
printf("%.5f %.5f\n",r*r*PI(),2*r*PI())
}

Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:8:26: error: 'PI' was not declared in this scope
    8 | printf("%.5f %.5f\n",r*r*PI(),2*r*PI())
      |                          ^~
Language: C++

#include <stdio.h>
#include <math.h>

main()
{
int r;
scanf("%d",&r);
printf("%.5f %.5f\n",r*r*M_PI,2*r*M_PI)
}

Compiler output:
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:8:40: error: expected ';' before '}' token
    8 | printf("%.5f %.5f\n",r*r*M_PI,2*r*M_PI)
      |                                        ^
      |                                        ;
    9 | }
      | ~
Language: C++

#include<iostream>
#include<iomanip>
#define _USE_MATH_DEFINES
#include<ATLComTime.h>
#include<cmath>
using namespace std;
int main()
{
	double a;
	cin >> a;
	cout << fixed;
	setprecision(6);
	cout << a*a*M_PI << ' ' << 2 * a*M_PI << endl;
	return 0;
}

Compiler output:
a.cc:4:9: fatal error: ATLComTime.h: No such file or directory
    4 | #include<ATLComTime.h>
      |         ^~~~~~~~~~~~~~
compilation terminated.
Language: C++

r = gets.to_f
s = r * r * Math::PI
l = 2 * r * Math::PI
printf('%f %f', s, l)

Compiler output:
a.cc:4:8: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    4 | printf('%f %f', s, l)
      |        ^~~~~~~
a.cc:1:1: error: 'r' does not name a type
    1 | r = gets.to_f
      | ^
Language: C++

import java.util.Scanner;
import java.lang.Math;

class Circle{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    double r = scan.nextInt();
    double pi = Math.PI;
    double s = r*r*pi;
    double dis = 2*r*pi;
    System.out.println(s+" "+dis);
  }
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.lang.Math;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:9: error: expected ':' before 'static'
    5 |   public static void main(String[] args){
      |         ^~~~~~~
      |         :
a.cc:5:27: error: 'String' has not been declared
    5 |   public static void main(String[] args){
      |                           ^~~~~~
a.cc:5:36: error: expected ',' or '...' before 'args'
    5 |   public static void main(String[] args){
      |                                    ^~~~
a.cc:13:2: error: expected ';' after class definition
   13 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Circle::main(int*)':
a.cc:6:5: error: 'Scanner' was not declared in this scope
    6 |     Scanner scan = new Scanner(System.in);
      |     ^~~~~~~
a.cc:7:16: error: 'scan' was not declared in this scope
    7 |     double r = scan.nextInt();
      |                ^~~~
a.cc:8:17: error: 'Math' was not declared in this scope
    8 |     double pi = Math.PI;
      |                 ^~~~
a.cc:11:5: error: 'System' was not declared in this scope
   11 |     System.out.println(s+" "+dis);
      |     ^~~~~~
a.cc:11:25: error: invalid operands of types 'double' and 'const char [2]' to binary 'operator+'
   11 |     System.out.println(s+" "+dis);
      |                        ~^~~~
      |                        | |
      |                        | const char [2]
      |                        double
Language: C++

#include<iostream>
using namespace std;

int main(){
 float pi=3.14159067
 float r;
 cin>>r;
 float s,l;
 s=r*r*pi;
 l=r*2*pi;
 cout<<s<<' '<<l<<'\n';
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:2: error: expected ',' or ';' before 'float'
    6 |  float r;
      |  ^~~~~
a.cc:7:7: error: 'r' was not declared in this scope
    7 |  cin>>r;
      |       ^
Language: C++

#include<iostream>
#include<cstdio>
using namespace std;

int main(){
 int r;
 double a,b,pi = 3.141592653589;

 scanf(%lf,&r);

 a = pi * r * r;
 b = 2 * pi *r;

 printf("%f %f\n" ,a,b);

 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: expected primary-expression before '%' token
    9 |  scanf(%lf,&r);
      |        ^
a.cc:9:9: error: 'lf' was not declared in this scope
    9 |  scanf(%lf,&r);
      |         ^~
Language: C++

#include<iostream>
#include<cstdio>

double r;
double m,s;

int main(){
    cin >> r;
    m = r * r * 3.14159265358979;
    s = r * 2.0 * 3.14159265358979;
    printf("%.8lf %.8lf", m, s);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    8 |     cin >> r;
      |     ^~~
      |     std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

#include <iostream>
#include <cstdio>

using namespace std;

int main() {
double PI = 3.141592653589;
double r;
cin >> r;

printf("%lf "%lf\n", PI*r*r, 2*PI*r);
	// your code goes here
	return 0;
}

Compiler output:
a.cc:11:17: error: stray '\' in program
   11 | printf("%lf "%lf\n", PI*r*r, 2*PI*r);
      |                 ^
a.cc:11:19: warning: missing terminating " character
   11 | printf("%lf "%lf\n", PI*r*r, 2*PI*r);
      |                   ^
a.cc:11:19: error: missing terminating " character
   11 | printf("%lf "%lf\n", PI*r*r, 2*PI*r);
      |                   ^~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:11:15: error: 'lf' was not declared in this scope
   11 | printf("%lf "%lf\n", PI*r*r, 2*PI*r);
      |               ^~
Language: C++

#include <iostream>
#include <stdio.h>
#include <cmath>

using namespace std;

const double M_PI = acos(-1);

int main() {
    double r, a, l;
    cin >> r;
    a = r * r * M_PI;
    l = 2 * r * M_PI;
    printf("%.6f %.6f\n", a, l);
    return 0;
}

Compiler output:
In file included from /usr/include/c++/14/cmath:47,
                 from a.cc:3:
a.cc:7:14: error: expected unqualified-id before numeric constant
    7 | const double M_PI = acos(-1);
      |              ^~~~
Language: C++

#include<cstdio>
int main() {
    int a, b;
    scanf_s("%d %d", &a, &b);
    printf("%d %d %lf\n", a / b, a%b, (double)a / b);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    4 |     scanf_s("%d %d", &a, &b);
      |     ^~~~~~~
      |     scanf
Language: C++

#include<cstdio>
int main() {
    double r,pi=3.1415926535;
    scanf_s("%lf",&r);
    printf("%lf %lf\n",r*r*pi,2*r*pi);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    4 |     scanf_s("%lf",&r);
      |     ^~~~~~~
      |     scanf
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <iomanip>
using namespace std;


int main(){
  int r;
  cin >> r;
  cout << pow(r, 2.0) * M_PI << endl;
  cout << 2 * r * M_PI << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:11: error: 'pow' was not declared in this scope
   11 |   cout << pow(r, 2.0) * M_PI << endl;
      |           ^~~
a.cc:11:25: error: 'M_PI' was not declared in this scope
   11 |   cout << pow(r, 2.0) * M_PI << endl;
      |                         ^~~~