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

int main(){
  int a,b,h,m;
  cin>>a>>b>>h>>m;
  double c = M_PI/6;
  double d = M_PI/30;
  double s;
  s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
  cout<<sqrtl((long double) s)<<endl;
}

Compiler output:
main.c: In function 'main':
main.c:3:3: error: 'cin' undeclared (first use in this function)
    3 |   cin>>a>>b>>h>>m;
      |   ^~~
main.c:3:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:4:14: error: 'M_PI' undeclared (first use in this function)
    4 |   double c = M_PI/6;
      |              ^~~~
main.c:7:22: error: implicit declaration of function 'cos' [-Wimplicit-function-declaration]
    7 |   s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
      |                      ^~~
main.c:1:1: note: include '<math.h>' or provide a declaration of 'cos'
  +++ |+#include <math.h>
    1 | int main(){
main.c:7:22: warning: incompatible implicit declaration of built-in function 'cos' [-Wbuiltin-declaration-mismatch]
    7 |   s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
      |                      ^~~
main.c:7:22: note: include '<math.h>' or provide a declaration of 'cos'
main.c:8:3: error: 'cout' undeclared (first use in this function)
    8 |   cout<<sqrtl((long double) s)<<endl;
      |   ^~~~
main.c:8:9: error: implicit declaration of function 'sqrtl' [-Wimplicit-function-declaration]
    8 |   cout<<sqrtl((long double) s)<<endl;
      |         ^~~~~
main.c:8:9: note: include '<math.h>' or provide a declaration of 'sqrtl'
main.c:8:9: warning: incompatible implicit declaration of built-in function 'sqrtl' [-Wbuiltin-declaration-mismatch]
main.c:8:9: note: include '<math.h>' or provide a declaration of 'sqrtl'
main.c:8:33: error: 'endl' undeclared (first use in this function)
    8 |   cout<<sqrtl((long double) s)<<endl;
      |                                 ^~~~
Language: C

int main(){
  int a,b,h,m;
  cin>>a>>b>>h>>m;
  double c = M_PI/6;
  double d = M_PI/30;
  double s;
  s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
  cout<<sqrtl((long double) s)<<endl
}

Compiler output:
main.c: In function 'main':
main.c:3:3: error: 'cin' undeclared (first use in this function)
    3 |   cin>>a>>b>>h>>m;
      |   ^~~
main.c:3:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:4:14: error: 'M_PI' undeclared (first use in this function)
    4 |   double c = M_PI/6;
      |              ^~~~
main.c:7:22: error: implicit declaration of function 'cos' [-Wimplicit-function-declaration]
    7 |   s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
      |                      ^~~
main.c:1:1: note: include '<math.h>' or provide a declaration of 'cos'
  +++ |+#include <math.h>
    1 | int main(){
main.c:7:22: warning: incompatible implicit declaration of built-in function 'cos' [-Wbuiltin-declaration-mismatch]
    7 |   s = (a*a+b*b-2*a*b*cos(m*d*11.0/12.0-h*c));
      |                      ^~~
main.c:7:22: note: include '<math.h>' or provide a declaration of 'cos'
main.c:8:3: error: 'cout' undeclared (first use in this function)
    8 |   cout<<sqrtl((long double) s)<<endl
      |   ^~~~
main.c:8:9: error: implicit declaration of function 'sqrtl' [-Wimplicit-function-declaration]
    8 |   cout<<sqrtl((long double) s)<<endl
      |         ^~~~~
main.c:8:9: note: include '<math.h>' or provide a declaration of 'sqrtl'
main.c:8:9: warning: incompatible implicit declaration of built-in function 'sqrtl' [-Wbuiltin-declaration-mismatch]
main.c:8:9: note: include '<math.h>' or provide a declaration of 'sqrtl'
main.c:8:33: error: 'endl' undeclared (first use in this function)
    8 |   cout<<sqrtl((long double) s)<<endl
      |                                 ^~~~
main.c:8:37: error: expected ';' before '}' token
    8 |   cout<<sqrtl((long double) s)<<endl
      |                                     ^
      |                                     ;
    9 | }
      | ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define PI 3.14159265358979323846264338327950L
 
int main(){
  double A,B,H,M;
  cin >> A >> B >> H >> M;
  double x,y;
  y =  M * 6;
  x = (H * 30 + M) * 0.5;
  double kakudo = abs(x-m);
  kakudo = min(kakudo, 360 - kakudo);
  double ans;

  ans = sqrt(pow(A,2) + pow(B,2) + (-2 * A * B * cos(kakudo * PI/180)));
  cout << ans << endl;

  }


Compiler output:
a.cc: In function 'int main()':
a.cc:12:25: error: 'm' was not declared in this scope
   12 |   double kakudo = abs(x-m);
      |                         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define PI 3.14159265358979323846264338327950L
 
int main(){
  double A,B,H,M;
  cin >> A >> B >> H >> M;
  double x,y;
  y =  M * 6;
  x = (H * 30 + M) * 0.5
  double kakudo = abs(x-m);
  kakudo = min(kakudo, 360 - kakudo);
  double ans;

  ans = sqrt(pow(A,2) + pow(B,2) + (-2 * A * B * cos(kakudo * PI/180)));
  cout << ans << endl;

  }


Compiler output:
a.cc: In function 'int main()':
a.cc:11:25: error: expected ';' before 'double'
   11 |   x = (H * 30 + M) * 0.5
      |                         ^
      |                         ;
   12 |   double kakudo = abs(x-m);
      |   ~~~~~~                 
a.cc:13:3: error: 'kakudo' was not declared in this scope
   13 |   kakudo = min(kakudo, 360 - kakudo);
      |   ^~~~~~
Language: C++

#include <iostream>
#include <cmath>
#include <algorithm>
#include <string> //文字列
#include <iomanip> //doubleの桁数指定 setprecision()
#include <list> //前後に数値を入れれる配列
#include <map> //map
#include <vector> //vecror

#define REP(i,m,n) for(ll i = (ll) (m);i < (ll) (n);i++) //forの短縮
#define rep(i,n) REP(i,0,n) //REPが0の時
#define ll long long int

using namespace std;

double PI = acos(-1); //円周率
ll mod = 1e9 + 7;




//提出コード
ll a, b, h, m;
long double ax, ay, bx, by, arad, brad, ans;

//degree → radian
long double chg_DegRad(long double deg) {
	return deg * PI / 180.0;
}



int main() {
	cin >> a >> b >> h >> m;
	
	arad = chg_DegRad(30 * h + long double(m / 2));
	brad = chg_DegRad(6 * m);

	ax = a * sin(arad);
	ay = a * cos(arad);
	bx = b * sin(brad);
	by = b * cos(brad);

	ans = sqrt(pow(abs(ax - bx), 2) + pow(abs(ay - by),2));
	cout << setprecision(10) << ans << endl;



	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:36:36: error: expected primary-expression before 'long'
   36 |         arad = chg_DegRad(30 * h + long double(m / 2));
      |                                    ^~~~
Language: C

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

int max(int a,int b){
  if(a > b) return a;
  else return b;
}
int min(int a, int b){
  if(a < b) return a;
  else return b;
}

int main(){

  int a,b;
  int h,m;
  scanf("%d%d%d%d",&a, &b, &h, &m);

  double angle = abs( ((double)h + 0.5 *(double)m * 30 - (double)m * 6 );
  double rad;
  if((int)angle == 180){
    printf("%.10f",a+b);
    return 0;
  }
    rad = (angle * M_PI/180);

  //printf("%.10f ",h);
  double ans = a * a + b * b -2 * a * b * cos(rad);
  printf("%.10f",pow(ans,0.5));

  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:21:73: error: expected ')' before ';' token
   21 |   double angle = abs( ((double)h + 0.5 *(double)m * 30 - (double)m * 6 );
      |                     ~                                                   ^
      |                                                                         )
main.c:34:1: error: expected ',' or ';' before '}' token
   34 | }
      | ^
main.c:34:1: error: expected declaration or statement at end of input
Language: C++

#include <bits/stdc++.h>

#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define ll long long
using namespace std;


int main() {
  int a, b, h, m;
  cin >> a >> b >> h >> m;
  static const double pi = 3.141592653589793;
    if (30 * h + 0.5 * m >= 6 * m) {
      if (30 * h + 0.5 * m - 6 * m < 180) {
        double w = 2 * pi * (30 * h + 0.5 * m - 6 * m) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(w))) << endl;
      }
      else {
        double x =  2 * pi * (360 - (30 * h + 0.5 * m - 6 * m)) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(x))) << endl;
      }
    }
    else {
      if (6 * m 0.5 * m - 30 * m < 180) {
        double y = 2 * pi * (6 * m - 30 * h) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(y))) << endl;
      }
      else {
        double z = 2 * pi * (360 - (6 * m - 30 * h)) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(z))) << endl;
      }
    }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:23:16: error: expected ')' before numeric constant
   23 |       if (6 * m 0.5 * m - 30 * m < 180) {
      |          ~     ^~~~
      |                )
Language: C++

#include <bits/stdc++.h> 
#include <math.h>
using namespace std;
#define PI 3.14159265358979323846264338327950L
int main(void) { 
  int a, b, h, m; 
  scanf("%d%d%d%d", &a, &b, &h, &m);
 long double rad = PI * 2 * ( 11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
 long double rsq = (long double)(a * a + b * b) - (long double)(2 * a * b) * cos(rad);
 cout << sqrt(rsq);
 return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:35: error: expected primary-expression before 'long'
    8 |  long double rad = PI * 2 * ( 11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                   ^~~~
a.cc:8:46: error: expression cannot be used as a function
    8 |  long double rad = PI * 2 * ( 11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                              ^
a.cc:8:47: error: expected ')' before 'h'
    8 |  long double rad = PI * 2 * ( 11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                             ~                 ^
      |                                               )
Language: C++

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
 
int main(){
	long long a, b, h, m;
	double r,rad,c;
 
	cin >> a >> b >> h >> m;
 
	r = static_cast<double>(6.0 * m - 0.5 * (h * 60.0 + m));
 
	if(r == 0.0) {
        c = b - a;
        if(c > 0){
          cout << c;
        else{
          cout << -1*C
        }
		
		
		return 0;
	}else if(r == 180.0){
		c = b + a;
		cout << c;
		return 0;
	}else if(r > 180.0){
		r = 360.0 - r;
	}else if(r < 0.0){
		r = 360.0 + r;
	}
 
	rad = static_cast<double>(r * M_PI / 180.0);
 
	c = static_cast<double>(sqrt(static_cast<double>(a*a) + static_cast<double>(b*b) - static_cast<double>(2*a*b*cos(rad))));
 
	cout << fixed << setprecision(20) << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: expected '}' before 'else'
   18 |         else{
      |         ^~~~
a.cc:16:18: note: to match this '{'
   16 |         if(c > 0){
      |                  ^
a.cc:19:22: error: 'C' was not declared in this scope
   19 |           cout << -1*C
      |                      ^
Language: C

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

#define PI 3.14159265358979323846264338327950L

int main(void){
  int a,b,h,m;
  scanf("%d%d%d%d",&a,&b,&h,&m);
  
  long double rad = PI * 2 * ((long double) h / 12.0 + ((longdouble)m /60.0) / 12.0 - (long double)m/60.0);
  long double rsq = (long double)(a*a+b*b) -(long double)(2*a*b)*cosl(rad);
  prinf("%20.20Lf\n",sqrtl(rsq));
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:58: error: 'longdouble' undeclared (first use in this function); did you mean 'long double'?
   10 |   long double rad = PI * 2 * ((long double) h / 12.0 + ((longdouble)m /60.0) / 12.0 - (long double)m/60.0);
      |                                                          ^~~~~~~~~~
      |                                                          long double
main.c:10:58: note: each undeclared identifier is reported only once for each function it appears in
main.c:10:69: error: expected ')' before 'm'
   10 |   long double rad = PI * 2 * ((long double) h / 12.0 + ((longdouble)m /60.0) / 12.0 - (long double)m/60.0);
      |                                                        ~            ^
      |                                                                     )
main.c:12:3: error: implicit declaration of function 'prinf'; did you mean 'printf'? [-Wimplicit-function-declaration]
   12 |   prinf("%20.20Lf\n",sqrtl(rsq));
      |   ^~~~~
      |   printf
Language: C

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
 
int main(){
	long long a, b, h, m;
	double r,rad,c;
 
	cin >> a >> b >> h >> m;
 
	r = static_cast<double>(6.0 * m - 0.5 * (h * 60.0 + m));
 
	if(r == 0.0) {
		c = b - a;
        if(c > 0){
          cout << c;
        else{
          cout << -1*C
        }
		return 0;
	}else if(r == 180.0){
		c = b + a;
		cout << c;
		return 0;
	}else if(r > 180.0){
		r = 360.0 - r;
	}else if(r < 0.0){
		r = 360.0 + r;
	}
 
	rad = static_cast<double>(r * M_PI / 180.0);
 
	c = static_cast<double>(sqrt(static_cast<double>(a*a) + static_cast<double>(b*b) - static_cast<double>(2*a*b*cos(rad))));
 
	cout << fixed << setprecision(20) << c << endl;
}

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define PI 3.14159265358979323846264338327950L
 
int main(){
  double A,B,H,M;
  cin >> A >> B >> H >> M;
  double x,y;
  y =  M * 6;
  x = H * 30 + (M/360)
  double kakudo;
  if(x >= y){
    kakudo = x - y;
  }else{
    kakudo = y - x;
  }
  double ans;

  ans = sqrt(pow(A,2) + pow(B,2) + (-2 * A * B * cos(kakudo * PI/180)));
  cout << ans << endl;

  }


Compiler output:
a.cc: In function 'int main()':
a.cc:11:23: error: expected ';' before 'double'
   11 |   x = H * 30 + (M/360)
      |                       ^
      |                       ;
   12 |   double kakudo;
      |   ~~~~~~               
a.cc:14:5: error: 'kakudo' was not declared in this scope
   14 |     kakudo = x - y;
      |     ^~~~~~
a.cc:16:5: error: 'kakudo' was not declared in this scope
   16 |     kakudo = y - x;
      |     ^~~~~~
a.cc:20:54: error: 'kakudo' was not declared in this scope
   20 |   ans = sqrt(pow(A,2) + pow(B,2) + (-2 * A * B * cos(kakudo * PI/180)));
      |                                                      ^~~~~~
Language: C

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
 
int main(){
	long long a, b, h, m;
	double r,rad,c;
 
	cin >> a >> b >> h >> m;
 
	r = static_cast<double>(6.0 * m - 0.5 * (h * 60.0 + m));
 
	if(r == 0.0) {
        c = b - a;
        if(c > 0){
          cout << c;
        else{
          cout << -1*C
        }
		
		
		return 0;
	}else if(r == 180.0){
		c = b + a;
		cout << c;
		return 0;
	}else if(r > 180.0){
		r = 360.0 - r;
	}else if(r < 0.0){
		r = 360.0 + r;
	}
 
	rad = static_cast<double>(r * M_PI / 180.0);
 
	c = static_cast<double>(sqrt(static_cast<double>(a*a) + static_cast<double>(b*b) - static_cast<double>(2*a*b*cos(rad))));
 
	cout << fixed << setprecision(20) << c << endl;
}

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>

#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define ll long long
using namespace std;


int main() {
  int a, b, h, m;
  cin >> a >> b >> h >> m;
  static const double pi = 3.141592653589793;
    if (30 * h + 0.5 * m >= 6 * m) {
      if (30 * h + 0.5 * m - 6 * m < 180) {
        double w = 2 * pi * (30 * h + 0.5 * m - 6 * m) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(w))) << endl;
      }
      else {
        double x =  2 * pi * (360 - (30 * h + 0.5 * m - 6 * m)) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(x))) << endl;
      }
    }
    else {
      if (6 * m - 30 * m < 180) {
        double y = 2 * pi * (6 * m - 30 * h) / 360;
        cout << setprecision(9) << double (sqrtl (a * a + b * b - 2 * a * b * cos(y))) << endl;
      }
      else {
        double z = 2 * pi * (360 - (6 * m - 30 * h)) / 360;
        cout << setprecision(10) << double (sqrtl (a * a + b * b - 2 * a * b * cos(z))) << endl;
      }
    }
  }

}

Compiler output:
a.cc:34:1: error: expected declaration before '}' token
   34 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double dl;
const int iNF = 1e9 + 100;
const ll INF = 1e18 + 100;
typedef pair<int, int> pii;
const double pi = acos(-1);

int main() {
   double a, b, h, m;
   cin >> a >> b >> h >> m;
   // h --> 0.5 ang / min
   // m --> 6 ang / min
   double h_ang = 0.5 * ((h * 60) + m) * (pi / 180);
   double m_ang = 6 * ((h * 60) + m) * (pi / 180);
   double yh = sin(h_ang) * a, xh = cos(h_ang) * a;
   double ym = sin(m_ang) * b, xm = cos(m_ang) * b;
   double ans = sqrt(pow(xh-xm,2)+pow(yh-ym,2));
   cout << fixed << setprecision(20) << ans << endl;
   return 0;
}#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double dl;
const int iNF = 1e9 + 100;
const ll INF = 1e18 + 100;
typedef pair<int, int> pii;
const double pi = acos(-1);

int main() {
   double a, b, h, m;
   cin >> a >> b >> h >> m;
   // h --> 0.5 ang / min
   // m --> 6 ang / min
   double h_ang = 0.5 * ((h * 60) + m) * (pi / 180);
   double m_ang = 6 * ((h * 60) + m) * (pi / 180);
   double yh = sin(h_ang) * a, xh = cos(h_ang) * a;
   double ym = sin(m_ang) * b, xm = cos(m_ang) * b;
   double ans = sqrt(pow(xh-xm,2)+pow(yh-ym,2));
   cout << fixed << setprecision(20) << ans << endl;
   return 0;
}

Compiler output:
a.cc:22:2: error: stray '#' in program
   22 | }#include <bits/stdc++.h>
      |  ^
a.cc:22:3: error: 'include' does not name a type
   22 | }#include <bits/stdc++.h>
      |   ^~~~~~~
a.cc:26:11: error: redefinition of 'const int iNF'
   26 | const int iNF = 1e9 + 100;
      |           ^~~
a.cc:5:11: note: 'const int iNF' previously defined here
    5 | const int iNF = 1e9 + 100;
      |           ^~~
a.cc:27:10: error: redefinition of 'const ll INF'
   27 | const ll INF = 1e18 + 100;
      |          ^~~
a.cc:6:10: note: 'const ll INF' previously defined here
    6 | const ll INF = 1e18 + 100;
      |          ^~~
a.cc:29:14: error: redefinition of 'const double pi'
   29 | const double pi = acos(-1);
      |              ^~
a.cc:8:14: note: 'const double pi' previously defined here
    8 | const double pi = acos(-1);
      |              ^~
a.cc:31:5: error: redefinition of 'int main()'
   31 | int main() {
      |     ^~~~
a.cc:10:5: note: 'int main()' previously defined here
   10 | int main() {
      |     ^~~~
Language: C++

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

#define PI 3.141592653589793238462643383279502884

int main(){
int a, b, h, m;
scanf("%d%d%d%d", &a, &b, &h, &m);
long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
long double rsq = (long double)(a * a + b * b) - (long double)(2 * a * b) * cosl(rad);
printf("%20.20Lf\n", sqrtl(rsq));
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:32: error: expected primary-expression before 'long'
    9 | long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                ^~~~
a.cc:9:43: error: expression cannot be used as a function
    9 | long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                           ^
a.cc:9:44: error: expected ')' before 'h'
    9 | long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                            ~               ^
      |                                            )
Language: C++

#include <bits/stdc++.h>

int main() {
    // insert code here...
    long double a,b,c,d,angle,ans;
    static const double pi =3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086;
    std::cin>>a>>b>>c>>d;
    angle=std::fabs(d*6-c*30-d*0.5);
    if(angle>180){
        angle=angle-180;
    }
    angle=pi*angle/180*10000000000;
    ans=a*a*1000000000000000000+b*b*1000000000000000000-2*a*b*cos(angle/10000000000)*1000000000000000000;
    std::cout<<std::fixed<<std::setprecision(20)<<sqrt(ans)/1000000000<<std::endl;
    }
    return 0;
}

Compiler output:
a.cc:16:5: error: expected unqualified-id before 'return'
   16 |     return 0;
      |     ^~~~~~
a.cc:17:1: error: expected declaration before '}' token
   17 | }
      | ^
Language: C

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

int main(){
int a,b,h,m;
long double c;

scanf("%d""%d""%d""%d",&a,&b,&h,&m);

c = sqrt(a*a + b*b -  2*a*b*cos((6*m - 30*h - m/2)* M_PI /180));

printf("%.20Lf",c);

return 0;



Compiler output:
main.c: In function 'main':
main.c:14:1: error: expected declaration or statement at end of input
   14 | return 0;
      | ^~~~~~
Language: C++

#include<iostream>
#include<math.h>
#include<algorithm>
#define PI 3.14159265358979323846264338327950L
using namespace std;

int main(){
    long double a,b,h,m;
    cin >> a >> b >> h >> m;
    /**/
    long double ans,dans,angle,cangle;
    /*角度*/
    angle = PI*abs(h/6.0 - (11.0*m)/360.0;
  
    cangle = cosl(angle);
    /**/
    dans = a*a + b*b - 2*a*b*cangle;
    
    ans = sqrt(dans);
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:42: error: expected ')' before ';' token
   13 |     angle = PI*abs(h/6.0 - (11.0*m)/360.0;
      |                   ~                      ^
      |                                          )
Language: C++

#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
#include <numeric> // next_parmutation
#include <cmath>
#include <iomanip>
#define ll long long
#define rep(i, n) for(int i = 0; i < (n); i++)
#define PI 3.14159265358979323846

using namespace std;

int main() {
    long double a, b, h, m;
    cin >> a >> b >> h >> m;
    long double radh, radm, rad;
    long double d = double(1./12.);
    radh = 2*(h/12.) + 2*(d)*(m/60.);
    radm = 2*(m/60.);
    rad = abs((radh - radm)*PI);

    //pi以上の場合
    //if(rad > PI) rad = double(2.*PI - rad);

    long double cul;
    cul = a*a+b*b-2*a*b*cos(rad);
    cout << setprecision(9) << long double(sqrt(cul)) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:32: error: expected primary-expression before 'long'
   41 |     cout << setprecision(9) << long double(sqrt(cul)) << endl;
      |                                ^~~~
Language: C++

#include <iostream>
#include <string>
#include <cmath>
using namespace std;
#define PI 3.141592653589793238462643383279502884

int main() {
	int a,b,h,m;
	cin >> a >> b >> h >> m;
	/*long double tyousin, tansin,kakudo;
	tyousin = m * 6.0;
	tansin = 30.0 * h + 0.5 * m;

	kakudo = tyousin - tansin;

	if (kakudo < 0.0) {
		kakudo = -kakudo;
	}
	if (kakudo >= 180.0) {
		kakudo -= 180.0;
	}
	cout << fixed;
	kakudo = PI * (kakudo / 180.0);
	long double s = -cos(kakudo) * (2 * a * b);
	cout << sqrt( s + pow(a, 2) + pow(b, 2)) << endl;*/

	
	/*int a, b, h, m;
	scanf("%d%d%d%d", &a, &b, &h, &m);*/
	long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
	long double rsq = (long double)(a * a + b * b) - (long double)(2 * a * b) * cosl(rad);
	printf("%20.20Lf\n", sqrtl(rsq));

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:40: error: expected primary-expression before 'long'
   30 |         long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                        ^~~~
a.cc:30:51: error: expression cannot be used as a function
   30 |         long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                                   ^
a.cc:30:52: error: expected ')' before 'h'
   30 |         long double rad = PI * 2 * (11(long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                                    ~               ^
      |                                                    )
Language: C

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

 
 
int main()
 {
	int a,b,h,m;
	long double adeg,bdeg,deg,rad;
	
scanf("%d%d%d%d",&a,&b,&h,&m);


	adeg=30.0*h+m*0.50;
	bdeg=6.0*m;

	deg=adeg-bdeg;

	if(deg<0){
		deg=-deg;
	}

	if(deg>180.0){
		k=deg-180.0;
	}

rad=deg*(3.1415926535897932384626433832795028841971693/180.0);




	
	answer=sqrt(a*a+b*b-2.0*a*b*cos(rad));




	printf("%.9f",answer);


	
			return 0;
	}


	







Compiler output:
main.c: In function 'main':
main.c:26:17: error: 'k' undeclared (first use in this function)
   26 |                 k=deg-180.0;
      |                 ^
main.c:26:17: note: each undeclared identifier is reported only once for each function it appears in
main.c:35:9: error: 'answer' undeclared (first use in this function)
   35 |         answer=sqrt(a*a+b*b-2.0*a*b*cos(rad));
      |         ^~~~~~
Language: C++

#include <iostream>
#include <numeric>
#include<math.h>
#include <stdio.h>
#include <iomanip>
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
using namespace std;
using ll = long long;

#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
int Max(int(a), int(b), int(c)) {
	return max(max(a, b), c);
}
int Min(int(a), int(b), int(c)) {
	return min(min(a, b), c);
}

int gcd(ll(a), ll(b)) {
	ll c = a;
	while (a % b != 0) {
		c = a % b;
		a = b;
		b = c;
	}
	return b;
}



int main() {
	double rad, ans;
	double PI = 3.14159265;
	double a, b, h, m, deg, times;
	cin >> a >> b >> h >> m;
	times = h * 60 + m;
	deg = 11 * (times / 2) % 360;
	rad = (deg + (times % 2) * 0.5) * PI / 180.0;
	ans = sqrt(a * a + b * b - 2 * a * b * cos(rad));
	printf("%.20f", ans);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:51:32: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   51 |         deg = 11 * (times / 2) % 360;
      |               ~~~~~~~~~~~~~~~~ ^ ~~~
      |                  |               |
      |                  double          int
a.cc:52:29: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   52 |         rad = (deg + (times % 2) * 0.5) * PI / 180.0;
      |                       ~~~~~ ^ ~
      |                       |       |
      |                       double  int
Language: C++

#include <stdio.h>
#include <math.h>
int main() {
   double A,B,H,M;
   double distance,HH;
   double theta,phi;
   double CC;
   distance = 1000;
   scanf("%lf %lf %lf %lf", &A, &B, &H, &M);

    HH = H/12;  
    printf("%lf\n",H);
    printf("2*M_PI = %lf\n",2*M_PI);
    printf("(H/12) = %lf\n",HH);
    theta = 2*M_PI*(H/12);
    
    printf("theta = %f\n",theta);
    phi = 2*M_PI*(M/60);
    printf("sin(theta) = %lf\n",sin(theta));
    CC = sqrt(sin(theta)*sin(theta) + cos(phi)*cos(phi);
    prinf("CC = %lf\n"CC);
    distance = (A-B)*sqrt(sin(theta)*sin(theta) + cos(phi)*cos(phi));
    printf("%lf",distance);

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:56: error: expected ')' before ';' token
   20 |     CC = sqrt(sin(theta)*sin(theta) + cos(phi)*cos(phi);
      |              ~                                         ^
      |                                                        )
a.cc:21:11: error: unable to find string literal operator 'operator""CC' with 'const char [10]', 'long unsigned int' arguments
   21 |     prinf("CC = %lf\n"CC);
      |           ^~~~~~~~~~~~~~
a.cc:21:5: error: 'prinf' was not declared in this scope; did you mean 'printf'?
   21 |     prinf("CC = %lf\n"CC);
      |     ^~~~~
      |     printf
Language: C++

#include <bits/stdc++.h>

long double pi = 3.141592653589793;

int main() {
    int a,b,h,m;
  cin >> a >> b >> h >> m;
double hr = h/12 * 2*pi;
double mr = m/60 * 2*pi;
double dig = abs(hr - mr);
double ans = sqrt((a*a) + (b*b) - 2 * a * b * cos(dig));

     cout << ans << endl;
 
  return 0;
}

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 >> a >> b >> h >> m;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 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:13:6: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   13 |      cout << ans << 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:13:21: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   13 |      cout << ans << endl;
      |                     ^~~~
      |                     std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C

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

int max(int a,int b){
  if(a > b) return a;
  else return b;
}
int min(int a, int b){
  if(a < b) return a;
  else return b;
}

int main(){

  int a,b;
  int h,m;
  scanf("%d%d%d%d",&a, &b, &h, &m);

  double angle = abs( ((double)h + (double)m/60) * 30 - (double)m * 6 );
  if((int)angle == 180){
    printf("%.10f",a+b);
  }else if(angle > 180){
    double rad = -(angle * M_PI/180);
  }else{
    double rad = (angle * M_PI/180);
  }
  
  //printf("%.10f ",h);
  double ans = a * a + b * b -2 * a * b * cos(rad);
  printf("%.10f",pow(ans,0.5));

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:31:47: error: 'rad' undeclared (first use in this function); did you mean 'rand'?
   31 |   double ans = a * a + b * b -2 * a * b * cos(rad);
      |                                               ^~~
      |                                               rand
main.c:31:47: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
using lond = long double;
lond pi(void) {
 return atan(1.0) * 4.0;
}
int main(){
	lint A,B,H,M;
	cin >> A >> B >> H >> M;
	lond ans;
	lint d_h,d_m;
	d_h = (H * 60 + M) * 0.5;
	d_m = (H * 60 + M) * 6;
	if (d_h >= 360)
		d_h = d_h % 360;
	if (d_m >= 360)
		d_m = d_m % 360;

	lond d_a = abs(d_h - d_m);//シータ
	// if (d_a > 180)
	// 	d_a = 360 - d_a;
	//cout << d_a << endl;
	cout << fixed << setprecision(20);
	ans = sqrt((lond)(B*B + A*A) - (lond)(2*A*B)*cos(d_a * pi()/180);//度数からラジアンにしてcosに入れる
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:73: error: expected ')' before ';' token
   25 |         ans = sqrt((lond)(B*B + A*A) - (lond)(2*A*B)*cos(d_a * pi()/180);//度数からラジアンにしてcosに入れる
      |                   ~                                                     ^
      |                                                                         )
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ll long long int

#define PI 3.14159265358979323846
  
double min(double x, double y)  
{  
    return (x < y)? x: y;  
      
}  
  
double calcAngle(double h, double m)  
{  
    // validate the input  
    if (h <0 || m < 0 || h >12 || m > 60)  
       // printf("Wrong input");  
  
    if (h == 12) h = 0;  
    if (m == 60) m = 0;  
  
    // Calculate the angles moved  
    // by hour and minute hands  
    // with reference to 12:00  
    double hour_angle = 0.5 * (h * 60 + m);  
    double minute_angle = 6 * m;  
  
    // Find the difference between two angles  
    double angle = abs(hour_angle - minute_angle);  
  
    // Return the smaller angle of two possible angles  
    angle = min(360 - angle, angle);  
  
    return angle;  
}  

int main() 
{
    double a,b,h,m;
    cin>>a>>b>>h>>m;
    int d=calcAngle(h,m);
    //cout<<d<<"\n";
    //cout<<fixed<<setprecision(20)<<cos((117*PI)/(180));
    double y=cos((d*PI)/180.0);
   // cout<<y<<"\n";
//     			double ans=(double)a*a+(double)b*b-(double)2*a*b*y;
// 			cout<<fixed<<setprecision(10)<<sqrt(ans);
    // if(d==180)
    // cout<<fixed<<setprecision(20)<<a+b;
    // else if(d==0)

Compiler output:
a.cc: In function 'int main()':
a.cc:44:32: error: expected '}' at end of input
   44 |     double y=cos((d*PI)/180.0);
      |                                ^
a.cc:38:1: note: to match this '{'
   38 | {
      | ^
Language: C++

#include <iostream>
#include <vector>
using namespace std;
using Graph = vector<vector<int>>;

// 深さ優先探索
int main(){
    long double a,b,h,m;
    cin>>a>>b>>h>>m;
    long double hr,mi,t;
    hr = 30*h + m/2;
    mi = 6*m;
    if(hr>mi){
        t=hr-mi;
    }else{
        t=mi-hr;
    }
    if(t>180){
        t=360-t;
    }
    cout<<fixed<<setprecision(20)<<(long double)sqrt(a*a + b*b - 2*a*b*cos(t*pi/180))<<'\n';
return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:18: error: 'setprecision' was not declared in this scope
   21 |     cout<<fixed<<setprecision(20)<<(long double)sqrt(a*a + b*b - 2*a*b*cos(t*pi/180))<<'\n';
      |                  ^~~~~~~~~~~~
a.cc:3:1: note: 'std::setprecision' is defined in header '<iomanip>'; this is probably fixable by adding '#include <iomanip>'
    2 | #include <vector>
  +++ |+#include <iomanip>
    3 | using namespace std;
a.cc:21:78: error: 'pi' was not declared in this scope; did you mean 'mi'?
   21 |     cout<<fixed<<setprecision(20)<<(long double)sqrt(a*a + b*b - 2*a*b*cos(t*pi/180))<<'\n';
      |                                                                              ^~
      |                                                                              mi
a.cc:21:72: error: 'cos' was not declared in this scope
   21 |     cout<<fixed<<setprecision(20)<<(long double)sqrt(a*a + b*b - 2*a*b*cos(t*pi/180))<<'\n';
      |                                                                        ^~~
a.cc:21:49: error: 'sqrt' was not declared in this scope
   21 |     cout<<fixed<<setprecision(20)<<(long double)sqrt(a*a + b*b - 2*a*b*cos(t*pi/180))<<'\n';
      |                                                 ^~~~
Language: C++

#include<iostream>
#include<stdio.h>
//#include <bits/stdc++.h>
#include<vector>
#include<float.h>
#include<iomanip>
#include<algorithm>
#include<string>
#include<cstring>
#include<math.h>
#include<cmath>
#include<sstream>
#include<set>
#include<map>
#include<queue>
#include <cassert>
#include <cmath>
#include<cstdint>

#define INF 1e9
#define rep(i,n)for(int i=0;(i)<(int)(n);i++)
#define REP(i,a,b)for(int i=(int)(a);(i)<=(int)(b);i++)
#define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i;
#define vec(type,n) vector<type>(n)
#define vvec(m,n) vector<vector<int>> (int(m),vector<int>(n))
#define ALL(a)  (a).begin(),(a).end()


using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
using P = pair<ll, ll>;

const ll MOD = INF + 7;

const double pi = 3.1415926535897932384626433832795;
int main(){
    long double a, b, h, m;
    cin >> a >> b >> h >> m;

    long double r1 = m * pi * 2, r2 = pi * (h + m / 60);
    long double r = abs(r1 - r2);
  	r /= 6,0;
    if(r > pi)r = 2 * pi - r;
    long double res = pow(a * a + b * b - 2 * a * b * cos(double r), 0.5000000000000);
    cout << fixed << setprecision(15) << res << endl;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:45:59: error: expected primary-expression before 'double'
   45 |     long double res = pow(a * a + b * b - 2 * a * b * cos(double r), 0.5000000000000);
      |                                                           ^~~~~~
Language: C++

// SeeAlso: 

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define MAX 100000
#define NIL -1
#define MOD 1000000007

typedef int _loop_int;
#define rep(i,n) for(int i = 0; i < n; i++)
#define FOR(i,a,b) for(_loop_int i=(_loop_int)(a);i<(_loop_int)(b);++i)
#define FORR(i,a,b) for(_loop_int i=(_loop_int)(b)-1;i>=(_loop_int)(a);--i)

#define debug(x) cout<<#x<<": "<<x<<endl
#define debig_vec(v) cout<<#v<<":";rep(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()

// 最大公約数
inline constexpr ll gcd(ll a,ll b){if(!a||!b)return 0;while(b){ll c=b;b=a%b;a=c;}return a;}
// 最小公倍数
inline constexpr ll lcm(ll a,ll b){if(!a||!b)return 0;return a*b/gcd(a,b);}

#define print2D(h, w, arr) rep(i, h) { rep(j, w) cout << arr[i][j] << " "; cout << endl; }
template<class T> void print(const T& x){cout << setprecision(12) << x << endl;}
template<class T, class... A> void print(const T& first, const A&... rest) { cout << first << " "; print(rest...); }

int main() {
    double pi = 3.3.14159265358979323846;
    double a,b,h,m;
    cin >> a >> b >> h >> m;
    
    double h_seta = 2 * pi * h / 12;
    double m_seta = 2* pi * m / 60;
    double ans;
    double kaku = h_seta-m_seta;


    double temp = a*a+b*b - 2*a*b*cos(kaku);
    ans = sqrt(temp);
    print(ans);
    return 0;
}


Compiler output:
a.cc:36:17: error: too many decimal points in number
   36 |     double pi = 3.3.14159265358979323846;
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
Language: Java

package main.task168;

import java.io.PrintWriter;
import java.math.BigDecimal;
import java.util.Scanner;

public class B {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
      int A = in.nextInt();
      int B = in.nextInt();
      int H = in.nextInt();
      int M = in.nextInt();

      double red = Math.PI * 2 * (H / 12.0 + (M / 60) / 12.0 - (M / 60));

      double rsq = (A * A + B * B) - (2 * A * B) * Math.cos(red);

      System.out.println(Math.sqrt(rsq));
    }
}


Compiler output:
Main.java:7: error: class B is public, should be declared in a file named B.java
public class B {
       ^
1 error
Language: C++

int main(){
    double a,b,h,m;
    cin >> a >> b >> h >> m;
    double t=h*60+m;
    double R=6*m;
    double r=0.5*t;
    double dr=R-r;
    double  c = pow(a,2)+pow(b,2)-2*a*b*cos(dr*3.14159265358979/180);
    cout << c << endl;;
    //cout << cos(3.1415);
    cout << fixed << setprecision(10);
    cout << pow(c,0.5) << endl;
    if(R==r) cout << 0.0000000000 << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> a >> b >> h >> m;
      |     ^~~
a.cc:8:17: error: 'pow' was not declared in this scope
    8 |     double  c = pow(a,2)+pow(b,2)-2*a*b*cos(dr*3.14159265358979/180);
      |                 ^~~
a.cc:8:41: error: 'cos' was not declared in this scope
    8 |     double  c = pow(a,2)+pow(b,2)-2*a*b*cos(dr*3.14159265358979/180);
      |                                         ^~~
a.cc:9:5: error: 'cout' was not declared in this scope
    9 |     cout << c << endl;;
      |     ^~~~
a.cc:9:18: error: 'endl' was not declared in this scope
    9 |     cout << c << endl;;
      |                  ^~~~
a.cc:11:13: error: 'fixed' was not declared in this scope
   11 |     cout << fixed << setprecision(10);
      |             ^~~~~
a.cc:11:22: error: 'setprecision' was not declared in this scope
   11 |     cout << fixed << setprecision(10);
      |                      ^~~~~~~~~~~~
Language: Java

import java.util.Scanner;

public class Main{
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		int A = scan.nextInt();
		int B = scan.nextInt();
		int H = scan.nextInt();
		int M = scan.nextInt();
		double Hr = 0;
		double Mr = 0;
		double R = 0;
		double result = 0;
		double tmp = 0;
      
      double ang = (H*60+M)*360/(12*60)-m*360/60;
      if(ang>180){
        ang=360-ang;
      }
      
		result = A*A+B*B-(2*A*B*Math.cos(Math.toRadians(ang)));
		result = Math.sqrt(result);
		System.out.println(result);
      
	}
}


Compiler output:
Main.java:16: error: cannot find symbol
      double ang = (H*60+M)*360/(12*60)-m*360/60;
                                        ^
  symbol:   variable m
  location: class Main
1 error
Language: C

#include <stdio.h> 
#include <math.h>
#define pi 3.1415926535897932384626433832795028841971693
int main() {
  int a,b,h,m;
  scanf("%d",&a);
  scanf("%d",&b);
  scanf("%d",&h);
  scanf("%d",&m);
  long double theta = fabsl(h*120-23*m)*720;
  long double L;
  if (theta<=pi) L = sqrt(a*a+b*b-2*a*b*cos(theta*pi));
  else L = sqrt(a*a+b*b+2*a*b*cos(theta:pi));
  printf("%.10Lf\n",L);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:40: error: expected ')' before ':' token
   13 |   else L = sqrt(a*a+b*b+2*a*b*cos(theta:pi));
      |                                  ~     ^
      |                                        )
Language: C++

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

using namespace std;
int main() {
    double A, B;
    double H, M;
    cin >> A >> B >> H >> M;
    double a;
    a = abs(H * 30 - M * 11 / 2);
    if (a > 180) {
        a = 360 - a;
    }
    double pi;
    pi = acos(-1.0);
    double seta;
    seta = a * pi / 180;
    if (seta == pi) {
        cout << A + B << endl;
    }
    else if (seta == 0) {
        cout << abs(A - B) << endl;
    }
    else {
        double m;
        m = sqrt(A * A + B * B - 2 * A * B * cos(seta));
        cout << fixed << seterprecision(15) << m << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:26: error: 'seterprecision' was not declared in this scope
   28 |         cout << fixed << seterprecision(15) << m << endl;
      |                          ^~~~~~~~~~~~~~
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <numeric>
#include <chrono>
#include <bitset>
#include <tuple>
#include <queue>
#include <map>
#include <cstring>
#include <cassert>
#define pi acos(-1)
using namespace std;

const int N = 2e5 + 10, mod = 1e9 + 7;


int main() {
    // ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int tc = 1; 
    // scanf("%d", &tc);
    for(int cn = 1; cn <= tc; cn++) {
        long long a, b, h, m; cin >> a >> b >> h >> m;
        long double an = abs((float) 30 * h + 0.5 * m - 6 * m);
        an = min(an, 360 - an);
        long double ans = (double)a * a + b * b - 2 * a * b * (double)cos((pi * an) / (double)180);
        printf("%.20lf\n", (double)sqrt(ans));
    }  
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:12: error: 'acos' was not declared in this scope
   13 | #define pi acos(-1)
      |            ^~~~
a.cc:27:76: note: in expansion of macro 'pi'
   27 |         long double ans = (double)a * a + b * b - 2 * a * b * (double)cos((pi * an) / (double)180);
      |                                                                            ^~
a.cc:27:71: error: 'cos' was not declared in this scope
   27 |         long double ans = (double)a * a + b * b - 2 * a * b * (double)cos((pi * an) / (double)180);
      |                                                                       ^~~
a.cc:28:36: error: 'sqrt' was not declared in this scope
   28 |         printf("%.20lf\n", (double)sqrt(ans));
      |                                    ^~~~
Language: C++

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

using namespace std;
static const ld PI = 3.141592653589793238462;
typedef long double ld;
int main()
{
    ld a, b, h, m;
    cin >> a >> b >> h >> m;
    ld theta = h / (ld)6 * PI+m/(ld)360*PI;
    ld phi = m / (ld)30 * PI;
    ld psi = abs(theta - phi);
    psi = (psi > PI) ? PI - psi : psi;
    ld ans = a * a + b * b - 2 * a * b * cos(psi);
    ans = sqrt(ans);
    cout <<fixed<<setprecision(15)<< ans << endl;
    return 0;
}

Compiler output:
a.cc:6:14: error: 'ld' does not name a type
    6 | static const ld PI = 3.141592653589793238462;
      |              ^~
a.cc: In function 'int main()':
a.cc:12:28: error: 'PI' was not declared in this scope
   12 |     ld theta = h / (ld)6 * PI+m/(ld)360*PI;
      |                            ^~
Language: C

import math
A, B, H, M = map(int, input().split())
pi = math.pi

ta = 30*H + 0.5*M
tb = 6*M

t = math.fabs( ta - tb )

if t > 180.0:
    t = 360.0 - t

print(t)

t = (t*pi)/180.0

ans = A*A + B*B - 2*A*B*math.cos(t)

print("{:.9f}".format(math.sqrt(ans)))







Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import math
      | ^~~~~~
main.c:2:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'A'
    2 | A, B, H, M = map(int, input().split())
      | ^
Language: C++

#include <bits/stdc++.h>
#include <cmath>
#include <iostream>
using namespace std;
typedef long long ll;
#define INF 1LL<<62
#define inf 1000000007
int main() {
	long double a,b,h,m;
	cin>>a>>b>>h>>m;
	long double A=h*30.0+m/2.0;
	long double B=6.0*m;
	long double now=double(abs(A-B));
	if(now>=180.0){
		now=360.0-180.0;
	}
	now=now*2.0*M_PI/360.0;
	now=double cos( now);
    long double ans=-2.0*a*b*now+a*a+b*b;
	ans=sqrt(ans);
	cout <<printf("%.10Lf",ans);
	// your code goes here
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:13: error: expected primary-expression before 'double'
   18 |         now=double cos( now);
      |             ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  	int A,B,H,M;
    cin >> A>>B>>H>>M; 
  double m = (360 / 60) * M;
  double h = (360 / 12) * H + (30 / 60) * m;
  double sit = 0;
  if(m <= h) sit = h-m;
  else sit = m-h;
  if(sit==180){cout << A+B;return 0;}
  if(sit==360 || sit == 0){cout << 0;return 0;}
  if(sit > 180) sit = 360 - sit;
  double pi = 3.14159265358979323846264338327950L
  sit = sit/360 * 2 * pi;
  double cosb =   cos(sit);
  double bb = A*A + B*B - 2*A*B*cosb;
  double b = sqrt(bb);
  cout << b << endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:3: error: expected ',' or ';' before 'sit'
   16 |   sit = sit/360 * 2 * pi;
      |   ^~~
Language: C++

#include <bits/stdc++.h>
#include <cmath>
#include <iostream>
using namespace std;
typedef long long ll;
#define INF 1LL<<62
#define inf 1000000007
int main() {
	long double a,b,h,m;
	cin>>a>>b>>h>>m;
	long double A=h*30.0+m/2.0;
	long double B=6.0*m;
	long double now=double(abs(A-B));
	if(now>=180.0){
		now=360.0-180.0;
	}
	now=now*2.0*M_PI/360.0;
	now=double cosl( now);
    long double ans=-2.0*a*b*now+a*a+b*b;
	ans=sqrt(ans);
	cout <<printf("%.10Lf",ans);
	// your code goes here
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:13: error: expected primary-expression before 'double'
   18 |         now=double cosl( now);
      |             ^~~~~~