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

#include <cstdio>
#include <iostream>
#include <iomanip>

int main(){
  int r;
  cin >> r;
  cout << fixed << setprecision(6) << r*r*3.14 << " " <<  fixed << setprecision(6) << 2 * 3.14 * r << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   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:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout << fixed << setprecision(6) << r*r*3.14 << " " <<  fixed << setprecision(6) << 2 * 3.14 * 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:8:11: error: 'fixed' was not declared in this scope; did you mean 'std::fixed'?
    8 |   cout << fixed << setprecision(6) << r*r*3.14 << " " <<  fixed << setprecision(6) << 2 * 3.14 * r << endl;
      |           ^~~~~
      |           std::fixed
In file included from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/ios_base.h:1104:3: note: 'std::fixed' declared here
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
a.cc:8:20: error: 'setprecision' was not declared in this scope; did you mean 'std::setprecision'?
    8 |   cout << fixed << setprecision(6) << r*r*3.14 << " " <<  fixed << setprecision(6) << 2 * 3.14 * r << endl;
      |                    ^~~~~~~~~~~~
      |                    std::setprecision
In file included from a.cc:3:
/usr/include/c++/14/iomanip:202:3: note: 'std::setprecision' declared here
  202 |   setprecision(int __n)
      |   ^~~~~~~~~~~~
a.cc:8:103: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout << fixed << setprecision(6) << r*r*3.14 << " " <<  fixed << setprecision(6) << 2 * 3.14 * r << endl;
      |                                                                                                       ^~~~
      |                                                                                                       std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include<iostream>
using namespace std;

int main()
{
  const double pi=3.14159265359;
  double a;
  cin>>a;
  cout<<a*a<<" "<<2.0*a*Pi<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:25: error: 'Pi' was not declared in this scope; did you mean 'pi'?
    9 |   cout<<a*a<<" "<<2.0*a*Pi<<endl;
      |                         ^~
      |                         pi
Language: C++

#include<iomanip>
#include<iostream>
using namespace std;
 
int main()
{
  const double pi=3.14159265359;
  double a;
  cin>>a;
  cout<<fixed<<precision(5)<<a*a<<" "<<2.0*a*Pi<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: 'precision' was not declared in this scope
   10 |   cout<<fixed<<precision(5)<<a*a<<" "<<2.0*a*Pi<<endl;
      |                ^~~~~~~~~
a.cc:10:46: error: 'Pi' was not declared in this scope; did you mean 'pi'?
   10 |   cout<<fixed<<precision(5)<<a*a<<" "<<2.0*a*Pi<<endl;
      |                                              ^~
      |                                              pi
Language: C++

#include<iomanip>
#include<iostream>
using namespace std;
  
int main()
{
  const double Pi=3.14159265359;
  double a;
  cin>>a;
  cout<<fixed<<setprecision(5)<<a*a<<" "<<2.0*a*Pi<<endl;
  return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:11:12: error: expected '}' at end of input
   11 |   return 0;
      |            ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

// 	ITP1_4_B

#include<iostream>
#include<cstdio>
#define PI 3.141592653589
using namespace std; // define PI
int main(){
	double r;
	cin >> r;
	
	double area, circ;
	area = PI*r**2;
	circ =2*pi*r;
	printf("%.5f %.5f", area, circ);
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:21: error: invalid type argument of unary '*' (have 'int')
   12 |         area = PI*r**2;
      |                     ^~
a.cc:13:17: error: 'pi' was not declared in this scope; did you mean 'PI'?
   13 |         circ =2*pi*r;
      |                 ^~
      |                 PI
Language: C++

#include<iostream>
#include<iomanip>
int main(){
int a;
cin>>a;
cout<<fixed<<setprecision(100)<<a*a*3.1415926<<'\n'<<a*2*3.1415926<<'\n';


return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 | cin>>a;
      | ^~~
      | 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:6:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 | cout<<fixed<<setprecision(100)<<a*a*3.1415926<<'\n'<<a*2*3.1415926<<'\n';
      | ^~~~
      | std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:7: error: 'fixed' was not declared in this scope; did you mean 'std::fixed'?
    6 | cout<<fixed<<setprecision(100)<<a*a*3.1415926<<'\n'<<a*2*3.1415926<<'\n';
      |       ^~~~~
      |       std::fixed
In file included from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/bits/ios_base.h:1104:3: note: 'std::fixed' declared here
 1104 |   fixed(ios_base& __base)
      |   ^~~~~
a.cc:6:14: error: 'setprecision' was not declared in this scope; did you mean 'std::setprecision'?
    6 | cout<<fixed<<setprecision(100)<<a*a*3.1415926<<'\n'<<a*2*3.1415926<<'\n';
      |              ^~~~~~~~~~~~
      |              std::setprecision
In file included from a.cc:2:
/usr/include/c++/14/iomanip:202:3: note: 'std::setprecision' declared here
  202 |   setprecision(int __n)
      |   ^~~~~~~~~~~~
Language: C++

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

int n;
scanf("%d",&n);
printf("%lf %lf",(double)n*n*pi,(double)n*2*pi);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:30: error: 'pi' was not declared in this scope
    7 | printf("%lf %lf",(double)n*n*pi,(double)n*2*pi);
      |                              ^~
Language: C++

#include <iostream>
using namespace std;

int main() {
    int r = 0;
    double S, C;
    cin >> r;

    S = 3.14 * r * r;
    C = 3.14 * pi * r;

    printf("%.6lf %.6lf\n", S, C);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: 'pi' was not declared in this scope
   10 |     C = 3.14 * pi * r;
      |                ^~
Language: C++

r = gets.to_f
puts '%.5f %.5f' % [Math::PI * r * r, 2 * Math::PI * r]

Compiler output:
a.cc:2:6: warning: multi-character literal with 9 characters exceeds 'int' size of 4 bytes
    2 | puts '%.5f %.5f' % [Math::PI * r * r, 2 * Math::PI * r]
      |      ^~~~~~~~~~~
a.cc:1:1: error: 'r' does not name a type
    1 | r = gets.to_f
      | ^
Language: C++

#include<iostream>
#include<iomanip>
//#define pi acos(-1.0)
#include<cmath>
using namespace std;

int main(){
	double r;
	double pi = 3.14159265
	cin >> r;
	cout << setprecision(6) << fixed << r*r*pi << " " << setprecision(6) << fixed << 2*r*pi << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: expected ',' or ';' before 'cin'
   10 |         cin >> r;
      |         ^~~
Language: C++

#include "cstdio"
#include <math.h>

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:1: error: expected ')' before '}' token
    8 | }
      | ^
a.cc:7:7: note: to match this '('
    7 | printf("%f %f\n",r*r*M_PI,2*r*M_PI
      |       ^
Language: C++

#include <stdio.h>

double r,s,l;

int main(){
  scanf("%d",&r);
  s=(double)r*r*??;
  l=2*(double)r*??;
  printf("%lf %lf\n",s,l);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: expected primary-expression before '?' token
    7 |   s=(double)r*r*??;
      |                 ^
a.cc:7:18: error: expected primary-expression before '?' token
    7 |   s=(double)r*r*??;
      |                  ^
a.cc:7:19: error: expected primary-expression before ';' token
    7 |   s=(double)r*r*??;
      |                   ^
a.cc:7:19: error: expected ':' before ';' token
    7 |   s=(double)r*r*??;
      |                   ^
      |                   :
a.cc:7:19: error: expected primary-expression before ';' token
a.cc:7:19: error: expected ':' before ';' token
    7 |   s=(double)r*r*??;
      |                   ^
      |                   :
a.cc:7:19: error: expected primary-expression before ';' token
a.cc:8:17: error: expected primary-expression before '?' token
    8 |   l=2*(double)r*??;
      |                 ^
a.cc:8:18: error: expected primary-expression before '?' token
    8 |   l=2*(double)r*??;
      |                  ^
a.cc:8:19: error: expected primary-expression before ';' token
    8 |   l=2*(double)r*??;
      |                   ^
a.cc:8:19: error: expected ':' before ';' token
    8 |   l=2*(double)r*??;
      |                   ^
      |                   :
a.cc:8:19: error: expected primary-expression before ';' token
a.cc:8:19: error: expected ':' before ';' token
    8 |   l=2*(double)r*??;
      |                   ^
      |                   :
a.cc:8:19: error: expected primary-expression before ';' token
Language: C++

#define _USE_MATH_DEFINES_
#include <cmath>
#include <iostream>

int main() {
  double r;

  std::cin >> d;

  double area;
  area = r * r * M_PI;
  double circumference;
  circumference = 2.0 * r * M_PI;

  std::cout << area << " " << circumference << std::endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: 'd' was not declared in this scope
    8 |   std::cin >> d;
      |               ^
Language: C++

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

int main(){
	double r;
	cin >> r;
	printf("%.7lf\n", r * r * 3.1415926535);
	printf("%.7lf\n", r * 2 * 3.1415926535);
	return 0;
}

Compiler output:
a.cc:2:9: fatal error: studio.h: No such file or directory
    2 | #include<studio.h>
      |         ^~~~~~~~~~
compilation terminated.
Language: C++

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

int main()
{
 dpuble r;
 double b,c;
 scanf("%lf",&r);
 b=r*r*M_PI;
 c=2*r*M_PI;
 printf("%lf %lf\n",b,c);

}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:2: error: 'dpuble' was not declared in this scope; did you mean 'double'?
    6 |  dpuble r;
      |  ^~~~~~
      |  double
a.cc:8:15: error: 'r' was not declared in this scope
    8 |  scanf("%lf",&r);
      |               ^
Language: C++

#include <iostream>


int main()
{
	double r,a,b;
	std::cin >> r;
	a = r*r*3.141592653589;
	b = 2 * r*3.141592653589;

	std::cout << std::fixed << std::setprecision(5) << a;
	std::cout << " ";
	std::cout << std::fixed << std::setprecision(5) << b << std::endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:41: error: 'setprecision' is not a member of 'std'
   11 |         std::cout << std::fixed << std::setprecision(5) << a;
      |                                         ^~~~~~~~~~~~
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 | 
a.cc:13:41: error: 'setprecision' is not a member of 'std'
   13 |         std::cout << std::fixed << std::setprecision(5) << b << std::endl;
      |                                         ^~~~~~~~~~~~
a.cc:13:41: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
Language: C++

#include<iostream>
#include<math.h>
using namespace std;
 
int main() {
    int r;
    cin >> r;
    cout << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:8:66: error: expected '}' at end of input
    8 |     cout << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |                                                                  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include<iostream>
#define _USE_MATH_DEFINES
#include<math.h>
using namespace std;
 
int main() {
    int r;
    cin >> r;
    cout << fixed  << setprecision(6)<< M_PI * r * r << ' ' << M_PI * 2 * r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:23: error: 'setprecision' was not declared in this scope
    9 |     cout << fixed  << setprecision(6)<< M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |                       ^~~~~~~~~~~~
a.cc:4:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    3 | #include<math.h>
  +++ |+#include <iomanip>
    4 | using namespace std;
Language: C++

#include<iostream>
#define _USE_MATH_DEFINES
#include<math.h>
using namespace std;
 
int main() {
    int r;
    cin >> r;
    cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: 'setprecision' was not declared in this scope
    9 |     cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |              ^~~~~~~~~~~~
a.cc:4:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    3 | #include<math.h>
  +++ |+#include <iomanip>
    4 | using namespace std;
Language: C++

#include<iostream>
#include<math.h>
using namespace std;
 
int main() {
    double r;
    cin >> r;
    cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: 'setprecision' was not declared in this scope
    8 |     cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |              ^~~~~~~~~~~~
a.cc:3:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    2 | #include<math.h>
  +++ |+#include <iomanip>
    3 | using namespace std;
Language: C++

#include<iostream>
#include<math.h>
#include<cmath>
using namespace std;
 
int main() {
    double r;
    cin >> r;
    cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: 'setprecision' was not declared in this scope
    9 |     cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |              ^~~~~~~~~~~~
a.cc:4:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    3 | #include<cmath>
  +++ |+#include <iomanip>
    4 | using namespace std;
Language: C++

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

#define _USE_MATH_DEFINES

using namespace std;
 
int main() {
    double r;
    cin >> r;
    cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: 'setprecision' was not declared in this scope
   11 |     cout  << setprecision(6) << fixed << M_PI * r * r << ' ' << M_PI * 2 * r << endl;
      |              ^~~~~~~~~~~~
a.cc:3:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    2 | #include<math.h>
  +++ |+#include <iomanip>
    3 |
Language: C++

#include<stdio.h>
int main() {
	int r;
	double a = 3.1415926535;
	scanf_s("%d", &r);
	printf("%f %f", a*r*r, 2*a*r);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    5 |         scanf_s("%d", &r);
      |         ^~~~~~~
      |         scanf
Language: C++

#include<stdio.h>
int main()
	double r,a = 3.1415926535;
	scanf("%d", &r);
	printf("%f %f\n", a*r*r, 2*a*r);
	return 0;
}

Compiler output:
a.cc:3:9: error: expected initializer before 'double'
    3 |         double r,a = 3.1415926535;
      |         ^~~~~~
a.cc:4:14: error: expected constructor, destructor, or type conversion before '(' token
    4 |         scanf("%d", &r);
      |              ^
a.cc:5:15: error: expected constructor, destructor, or type conversion before '(' token
    5 |         printf("%f %f\n", a*r*r, 2*a*r);
      |               ^
a.cc:6:9: error: expected unqualified-id before 'return'
    6 |         return 0;
      |         ^~~~~~
a.cc:7:1: error: expected declaration before '}' token
    7 | }
      | ^
Language: C++

#include<stdio.h>
int main()
	double a = 3.1415926535,r;
	scanf("%d", &r);
	printf("%f %f\n", a*r*r, 2*a*r);
	return 0;
}

Compiler output:
a.cc:3:9: error: expected initializer before 'double'
    3 |         double a = 3.1415926535,r;
      |         ^~~~~~
a.cc:4:14: error: expected constructor, destructor, or type conversion before '(' token
    4 |         scanf("%d", &r);
      |              ^
a.cc:5:15: error: expected constructor, destructor, or type conversion before '(' token
    5 |         printf("%f %f\n", a*r*r, 2*a*r);
      |               ^
a.cc:6:9: error: expected unqualified-id before 'return'
    6 |         return 0;
      |         ^~~~~~
a.cc:7:1: error: expected declaration before '}' token
    7 | }
      | ^
Language: C++

#include<stdio.h>
int main()
        int r;
	double a = 3.1415926535;
	scanf("%d", &r);
	printf("%f %f\n", a*r*r, 2*a*r);
	return 0;
}

Compiler output:
a.cc:3:9: error: expected initializer before 'int'
    3 |         int r;
      |         ^~~
a.cc:5:14: error: expected constructor, destructor, or type conversion before '(' token
    5 |         scanf("%d", &r);
      |              ^
a.cc:6:15: error: expected constructor, destructor, or type conversion before '(' token
    6 |         printf("%f %f\n", a*r*r, 2*a*r);
      |               ^
a.cc:7:9: error: expected unqualified-id before 'return'
    7 |         return 0;
      |         ^~~~~~
a.cc:8:1: error: expected declaration before '}' token
    8 | }
      | ^
Language: C++

#include<stdio.h>
int main()
        int r;
	double a = 3.1415926535;
	scanf("%d", &r);
	printf("%f %f", a*r*r, 2*a*r);
	return 0;
}

Compiler output:
a.cc:3:9: error: expected initializer before 'int'
    3 |         int r;
      |         ^~~
a.cc:5:14: error: expected constructor, destructor, or type conversion before '(' token
    5 |         scanf("%d", &r);
      |              ^
a.cc:6:15: error: expected constructor, destructor, or type conversion before '(' token
    6 |         printf("%f %f", a*r*r, 2*a*r);
      |               ^
a.cc:7:9: error: expected unqualified-id before 'return'
    7 |         return 0;
      |         ^~~~~~
a.cc:8:1: error: expected declaration before '}' token
    8 | }
      | ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    5 |         scanf_s("%lf", &r);
      |         ^~~~~~~
      |         scanf
Language: C++

#include<stdio.h>
int main() {
	int r;
	double a = 3.14159265359,w,n;
???      w=a*r*r;
        n=2*a*r;
	scanf("%d", &r);
	printf("%f %f\n",w ,n );
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: expected primary-expression before '?' token
    5 | ???      w=a*r*r;
      | ^
a.cc:5:2: error: expected primary-expression before '?' token
    5 | ???      w=a*r*r;
      |  ^
a.cc:5:3: error: expected primary-expression before '?' token
    5 | ???      w=a*r*r;
      |   ^
a.cc:5:17: error: expected ':' before ';' token
    5 | ???      w=a*r*r;
      |                 ^
      |                 :
a.cc:5:17: error: expected primary-expression before ';' token
a.cc:5:17: error: expected ':' before ';' token
    5 | ???      w=a*r*r;
      |                 ^
      |                 :
a.cc:5:17: error: expected primary-expression before ';' token
a.cc:5:17: error: expected ':' before ';' token
    5 | ???      w=a*r*r;
      |                 ^
      |                 :
a.cc:5:17: error: expected primary-expression before ';' token
Language: C++

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

int main() {
	int r;
	double S, l;
	scanf_s("%d", &r);
	S = 3.1415926535*r*r;
	l = 3.1415926535 * 2 * r;
	
	printf("%6lf %6lf\n", S, l);
	return 0;
}

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

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

int main() {
	int r;
	double S, l;
	scanf_s("%d", &r);/////////////////////
	S = 3.1415926535*r*r;
	l = 3.1415926535 * 2 * r;
	
	printf("%6lf %6lf\n", S, l);
	return 0;
}

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

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

int main()
{
  double r;
  cin >> r;

  cout << fixed << setprecision(6);
  cout << r * r * M_PI << " ";
  cout << 2 * r * M_PI << endl;

  return 0;
}
~          

Compiler output:
a.cc:17:2: error: expected class-name at end of input
   17 | ~
      |  ^
Language: C++

#include <iomanip>
using namespace std;
#define PI 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
int main()
{
	double r;
	double a,c;
	while(cin>>r)
	{
		a=r*r*PI;
		c=2*r*PI;
		cout<<setiosflags(ios::fixed)<<setprecision(8);
		cout<<a<<" "<<c<<endl;


		
}
}
	

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: 'cin' was not declared in this scope
    8 |         while(cin>>r)
      |               ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <iomanip>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:12:17: error: 'cout' was not declared in this scope
   12 |                 cout<<setiosflags(ios::fixed)<<setprecision(8);
      |                 ^~~~
a.cc:12:17: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <stdio.h>
#include <math.h>
int main()
{
    double r;
    scanf("%lf",&r);
    printf("%f %f",M_PI*r*r,M_PI*2*r\n);
    return 0;
}

Compiler output:
a.cc:7:37: error: stray '\' in program
    7 |     printf("%f %f",M_PI*r*r,M_PI*2*r\n);
      |                                     ^
a.cc: In function 'int main()':
a.cc:7:37: error: expected ')' before 'n'
    7 |     printf("%f %f",M_PI*r*r,M_PI*2*r\n);
      |           ~                         ^~
      |                                     )
Language: C++

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

const double PI  =3.141592653589793238463;

int main(){
    int r;
    cin >> r;
    cout << fixed << setprecision(5) << 2 * r * PI << " " << r * r * PI << endl;
}#include<iostream>
#include<iomanip>
using namespace std;

const double PI  =3.141592653589793238463;

int main(){
    int r;
    cin >> r;
    cout << fixed << setprecision(6) << 2 * r * PI << " " << r * r * PI << endl;
}

Compiler output:
a.cc:11:2: error: stray '#' in program
   11 | }#include<iostream>
      |  ^
a.cc:11:3: error: 'include' does not name a type
   11 | }#include<iostream>
      |   ^~~~~~~
a.cc:15:14: error: redefinition of 'const double PI'
   15 | const double PI  =3.141592653589793238463;
      |              ^~
a.cc:5:14: note: 'const double PI' previously defined here
    5 | const double PI  =3.141592653589793238463;
      |              ^~
a.cc:17:5: error: redefinition of 'int main()'
   17 | int main(){
      |     ^~~~
a.cc:7:5: note: 'int main()' previously defined here
    7 | int main(){
      |     ^~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(int argc, char const *argv[])
{
    double r;
    cin >> r;
    cout << fixed << setprecision(6) << r * r * M_PI << " " << 2 * r * M_PI << endl;

    return 0:
}

Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:11:13: error: expected ';' before ':' token
   11 |     return 0:
      |             ^
      |             ;
a.cc:11:13: error: expected primary-expression before ':' token
Language: C++

#include <iostream>
#include <math.h>
using namespace td;

int main() {
	int r;
	float a, b;
	cin >> r;
	a = r * r * M_PI;
	b = 2 * r * M_PI;
	cout << a << " " << b << endl;
	return 0;
}

Compiler output:
a.cc:3:17: error: 'td' is not a namespace-name
    3 | using namespace td;
      |                 ^~
a.cc: In function 'int main()':
a.cc:8:9: 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:11:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 |         cout << a << " " << b << 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:11:34: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 |         cout << a << " " << b << 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() {
 const float pi = acos(-1);

 float r;

 cin >> r;

 flaot area = r * r * pi;
 flaot len = 2 * pi * r;

 cout << area << " " << len << endl;

 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:2: error: 'flaot' was not declared in this scope; did you mean 'float'?
   13 |  flaot area = r * r * pi;
      |  ^~~~~
      |  float
a.cc:14:7: error: expected ';' before 'len'
   14 |  flaot len = 2 * pi * r;
      |       ^~~~
      |       ;
a.cc:16:10: error: 'area' was not declared in this scope
   16 |  cout << area << " " << len << endl;
      |          ^~~~
a.cc:16:25: error: 'len' was not declared in this scope
   16 |  cout << area << " " << len << endl;
      |                         ^~~
Language: C++

#include <iostream>
#include <cmath>

using namespace std;

int main() {
 const float pi = (float)acos(-1);

 float r;

 cin >> r;

 flaot area = r * r * pi;
 flaot len = 2 * pi * r;

 cout << area << " " << len << endl;

 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:2: error: 'flaot' was not declared in this scope; did you mean 'float'?
   13 |  flaot area = r * r * pi;
      |  ^~~~~
      |  float
a.cc:14:7: error: expected ';' before 'len'
   14 |  flaot len = 2 * pi * r;
      |       ^~~~
      |       ;
a.cc:16:10: error: 'area' was not declared in this scope
   16 |  cout << area << " " << len << endl;
      |          ^~~~
a.cc:16:25: error: 'len' was not declared in this scope
   16 |  cout << area << " " << len << endl;
      |                         ^~~
Language: C++

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

void main(void)
{

double radius;

cin >> radius;

cout << radius*radius*M_PI << endl;

cout << radius*radius*M_PI  << endl;


}

Compiler output:
a.cc:1:10: fatal error: iostream.h: No such file or directory
    1 | #include <iostream.h>
      |          ^~~~~~~~~~~~
compilation terminated.
Language: C++

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

void main(void)
{

double radius;

cin >> radius;

cout << radius*radius*M_PI << radius*radius*M_PI  << endl;


}

Compiler output:
a.cc:1:10: fatal error: iostream.h: No such file or directory
    1 | #include <iostream.h>
      |          ^~~~~~~~~~~~
compilation terminated.
Language: C++

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

void main(void)
{

double radius;

cin >> radius;

cout << radius*radius*M_PI << radius*radius*M_PI  << endl;


}

Compiler output:
a.cc:4:1: error: '::main' must return 'int'
    4 | void main(void)
      | ^~~~
a.cc: In function 'int main()':
a.cc:9:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 | cin >> radius;
      | ^~~
      | 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:11:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 | cout << radius*radius*M_PI << radius*radius*M_PI  << 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:11:54: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 | cout << radius*radius*M_PI << radius*radius*M_PI  << 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 <math.h>

int main(void)
{

double radius;

cin >> radius;

cout << radius*radius*M_PI << radius*radius*M_PI  << endl;

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    9 | cin >> radius;
      | ^~~
      | 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:11:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 | cout << radius*radius*M_PI << radius*radius*M_PI  << 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:11:54: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 | cout << radius*radius*M_PI << radius*radius*M_PI  << 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 <iomanip>
#include <math>
using namespace std;
int main(void){
    int a;
    cin >> a;
    cout << std::fixed << setprecision(6) << M_PI*r*r << " " << 2*M_PI*r << endl;
    return 0;
}



Compiler output:
a.cc:3:10: fatal error: math: No such file or directory
    3 | #include <math>
      |          ^~~~~~
compilation terminated.
Language: C++

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main(void){
    int a;
    cin >> a;
    cout << std::fixed << setprecision(6) << M_PI*r*r << " " << 2*M_PI*r << endl;
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:8:51: error: 'r' was not declared in this scope
    8 |     cout << std::fixed << setprecision(6) << M_PI*r*r << " " << 2*M_PI*r << endl;
      |                                                   ^
Language: C++

#include<iostream>
#include<iomanip>
#define P=3.1415926535
using namespace std;
int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}


Compiler output:
a.cc:3:9: warning: ISO C++11 requires whitespace after the macro name
    3 | #define P=3.1415926535
      |         ^
a.cc: In function 'int main()':
a.cc:3:10: error: expected primary-expression before '=' token
    3 | #define P=3.1415926535
      |          ^
a.cc:5:78: note: in expansion of macro 'P'
    5 | int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}
      |                                                                              ^
a.cc:5:79: error: invalid operands of types 'double' and 'const char [2]' to binary 'operator<<'
    5 | int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}
      |                                                                               ^~~~~
      |                                                                                 |
      |                                                                                 const char [2]
a.cc:3:10: error: expected primary-expression before '=' token
    3 | #define P=3.1415926535
      |          ^
a.cc:5:88: note: in expansion of macro 'P'
    5 | int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}
      |                                                                                        ^
a.cc:5:92: error: expected primary-expression before ',' token
    5 | int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}
      |                                                                                            ^
Language: C++

#include<iostream>
#include<iomanip>
#define P 3.1415926535
using namespace std;
int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:92: error: expected primary-expression before ',' token
    5 | int main(){double r; cin>>r;cout.setf(ios::fixed);cout<<setprecision(8)<<r*r*P<<" "<<2*P*r<,endl;}
      |                                                                                            ^
Language: C++

#include<cmath>
#include<cstdio>
int main(){
	double r;
	scanf("%lf",&r);
	printf("%.7f %.7f\n",pow(r,2)*M_PI,2*r*M_PI)
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:53: error: expected ';' before '}' token
    6 |         printf("%.7f %.7f\n",pow(r,2)*M_PI,2*r*M_PI)
      |                                                     ^
      |                                                     ;
    7 | }
      | ~
Language: C++

#include "stdio.h"

int main(int r)
{
    float len;
    float s;
    float pai=3.14;

    if((r < 0) || (r > 10000)
    {
        return 0;
    }

    s = r*r*pai;
    len = 2*r*pai;

   printf("%f %f\n", s, len);

   return 0;
}


Compiler output:
a.cc:3:5: warning: 'int main(int)' takes only zero or two arguments [-Wmain]
    3 | int main(int r)
      |     ^~~~
a.cc: In function 'int main(int)':
a.cc:9:30: error: expected ';' before '{' token
    9 |     if((r < 0) || (r > 10000)
      |                              ^
      |                              ;
   10 |     {
      |     ~                         
a.cc:14:16: error: expected ')' before ';' token
   14 |     s = r*r*pai;
      |                ^
      |                )
a.cc:9:7: note: to match this '('
    9 |     if((r < 0) || (r > 10000)
      |       ^
Language: C++

#include "stdio.h"

int main(doubler)
{
    double len;
    double s;
    double pai=3.141592;

    if((r < 0) || (r > 10000))
    {
        return 0;
    }

    s = r*r*pai;
    len = 2.0*r*pai;

   printf("%lf %lf\n", s, len);

   return 0;
}


Compiler output:
a.cc:3:5: error: cannot declare '::main' to be a global variable
    3 | int main(doubler)
      |     ^~~~
a.cc:3:10: error: 'doubler' was not declared in this scope; did you mean 'double'?
    3 | int main(doubler)
      |          ^~~~~~~
      |          double
Language: C++

#include "stdio.h"
#include "math.h"

int main(double r)
{
    double r2;
    double len;
    double s;

    if((r < 0) || (r > 10000))
    {
        return 0;
    }

    r2 = r*r;
    s = r2*M_PI;
    len = 2.0*r*M_PI;

   printf("%lf %f\n", s, input);

   return 0;
}


Compiler output:
a.cc:4:5: warning: first argument of 'int main(double)' should be 'int' [-Wmain]
    4 | int main(double r)
      |     ^~~~
a.cc:4:5: warning: 'int main(double)' takes only zero or two arguments [-Wmain]
a.cc: In function 'int main(double)':
a.cc:19:26: error: 'input' was not declared in this scope; did you mean 'int'?
   19 |    printf("%lf %f\n", s, input);
      |                          ^~~~~
      |                          int
Language: C++

#include "stdio.h"
#include "math.h"

int main()
{
    float r;
    double len;
    double s;

    scanf("%f",&r);

    if((r < 0) || (r > 10000))
    {
        return 0;
    }

    s = r2*M_PI;
    len = 2.0*r*M_PI;

   printf("%lf %lf\n", s, len);

   return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'r2' was not declared in this scope; did you mean 'r'?
   17 |     s = r2*M_PI;
      |         ^~
      |         r
Language: C++

#include <iostream>
using namespace std;

int main(){
    float r,a,b;
    cin >> r;
    float pi = 3.141592
    a = r^2 * pi;
    b = pi * r;
    cout << a b << endl;
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: expected ',' or ';' before 'a'
    8 |     a = r^2 * pi;
      |     ^
a.cc:10:14: error: expected ';' before 'b'
   10 |     cout << a b << endl;
      |              ^~
      |              ;
Language: C++

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

int main(){
    double rad,area,length;

    cin >> rad;
    area = M_PI * rad * rad;
    length = 2 * M_PI * rad;
    printf("%6f %6f\n",area,length);
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |     cin >> rad;
      |     ^~~
      |     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++

import java.util.Scanner;
public class Main {
	 public static void main(String[] args) {
		 Scanner sc = new Scanner(System.in);
	        int r;

	            r = sc.nextInt();
	            double mm,en;
	            en=2*r*3.14159265;
	            mm=r*r*3.14159265;
	            
	            System.out.printf("%f %f",en,mm);
	           
	            sc.close();
	    }
	}


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: expected unqualified-id before 'public'
    2 | public class Main {
      | ^~~~~~
Language: C++

#include <iostream>
#include <string>
#include <math.h>  /* M_PI */
using namespace std;

int main(){
  double a;
cin>>a;

cout<<2*M_PI*a<" "<<a*a*M_PI<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: invalid operands of types 'const char [2]' and 'double' to binary 'operator<<'
   10 | cout<<2*M_PI*a<" "<<a*a*M_PI<<endl;
      |                ~~~^~
      |                |
      |                const char [2]
Language: C++

import math
r=int(input())
print("{:.5f} {:.5f}".format(r*r*math.pi,r*2*math.pi))



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 <iostream>
using namespace std;
int main(){
double r,c,a,pi=3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 7867831652712019091456485;
cin >> r;
c=2*r*pi;
a=r*r*pi;
cout << a <<' '<<c<<endl;


}


Compiler output:
a.cc:4:95: warning: integer constant is too large for its type
    4 | double r,c,a,pi=3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 7867831652712019091456485;
      |                                                                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:4:174: warning: integer constant is too large for its type
    4 | double r,c,a,pi=3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 7867831652712019091456485;
      |                                                                                                                                                                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:4:253: warning: integer constant is too large for its type
    4 | double r,c,a,pi=3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 7867831652712019091456485;
      |                                                                                                                                                                                                                                                             ^~~~~~~~~~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:4:95: error: expected ',' or ';' before numeric constant
    4 | double r,c,a,pi=3.141592653589793238462643383279502884197169399375105820974944592307816406286 208998628034825342117067982148086513282306647093844609550582231725359408128481 117450284102701938521105559644622948954930381964428810975665933446128475648233 7867831652712019091456485;
      |                                                                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include<cstdio>
#include<math.h>
using namespace std;
int main(){
    float x;
    scanf("%f",x);
    printf("%f %f\n",x*x*M/PI,M_PI*x*2);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:26: error: 'M' was not declared in this scope
    7 |     printf("%f %f\n",x*x*M/PI,M_PI*x*2);
      |                          ^
a.cc:7:28: error: 'PI' was not declared in this scope
    7 |     printf("%f %f\n",x*x*M/PI,M_PI*x*2);
      |                            ^~
Language: C++

import java.util.Scanner;

public class Main {
	public static void main(String [] args) {
		Scanner stdIn = new Scanner(System.in);
		double S, cir;
		double r = stdIn.nextDouble();
		
		while(0 > r || r > 10000f) {
			r = stdIn.nextDouble();
		}
		
		cir = Math.PI * 2 * r;
		S = Math.PI * r * r;
		
		System.out.println(S + " " + cir);
		
		
	}
}


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:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

#include<stdio.h>
#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<string.h>
#include<math.h>
#include<utility>
#include<map>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vi;
typedef vector<string> vs;
typedef pair<ll,ll> P;
typedef vector<P> vp;
#define REP(i,n) for(ll i=0;i<n;i++)
#define FOR(i,m,n) for(ll i=m;i<n;i++)
#define REPR(i,n) for(ll i=n-1;i>=0;i--)
#define FORR(i,n,m) for(ll i=n-1;i>=m;i--)
#define all(in) in.begin(),in.end()
#define ALL(in,K) in,in+K
#define INF 100000000
#define MOD 100000007
#define SIZE 100005

int main(){
  ll r;
  cin >> r;
  cout << r*r*pi << " " << 2*pi*r << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:15: error: 'pi' was not declared in this scope; did you mean 'vi'?
   30 |   cout << r*r*pi << " " << 2*pi*r << endl;
      |               ^~
      |               vi
Language: C++

import java.io.*;

public class main{
    public static void main(String[] args){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try{
            String line = reader.readLine();
            double r=Integer.parseInt(line);
            System.out.printf("%6f %6f",2*Math.PI*r,Math.PI*r*r);
        }catch (IOException e){
	    System.out.println(e);
        }
    }
}
  


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class main{
      | ^~~~~~
Language: C++

import java.io.*;

public class Main{
    public static void main(String[] args){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try{
            String line = reader.readLine();
            double r=Integer.parseInt(line);
            System.out.printf("%6f %6f",2*Math.PI*r,Math.PI*r*r);
        }catch (IOException e){
	    System.out.println(e);
        }
    }
}
  


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main{
      | ^~~~~~
Language: C++



public class Main{
    public static void main(String[] args){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try{
            String line = reader.readLine();
            double r=Integer.parseInt(line);
            System.out.printf("%6f %6f",2*Math.PI*r,Math.PI*r*r);
        }catch (IOException e){
	    System.out.println(e);
        }
    }
}
  


Compiler output:
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main{
      | ^~~~~~
Language: C++

import java.io.*;

public class Main {
    public static void main(String[] args){
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try{
            String line = reader.readLine();
            double r=Integer.parseInt(line);
            System.out.printf("%6f %6f",2*Math.PI*r,Math.PI*r*r);
        }catch (IOException e){
	    System.out.println(e);
        }
    }
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

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

int main(){
	long long double r, m, e;
	const double p = 3.14159265;
	cin >> r;
	m = r*r*p;
	e = 2*r*p;
	cout << fixed;
	cout << setprecision(6) << m << " " << e << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:14: error: 'long long' specified with 'double'
    6 |         long long double r, m, e;
      |              ^~~~
a.cc:6:14: error: 'long long' specified with 'double'
a.cc:6:14: error: 'long long' specified with 'double'