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

import java.io.*;
public class Main{
  public static void main(String[] args) throws IOException{
    
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int A,B,H,M;
    
    try{
      String[] contexts = reader.readLine().split(" ");
      A = Integer.parseInt(contexts[0]);
      B = Integer.parseInt(contexts[1]);
      H = Integer.parseInt(contexts[2]);
      M = Integer.parseInt(contexts[3]);
    }finally{
      reader.close();
    }
    
    // 角度
    int intAngle = Math.abs((360 / 12) * H - (360 / 60) * M);
    
    // 長さ
    double dblLen;
    dblLen += Math.pow(A * 1.0, 2.0)
    dblLen += Math.pow(B * 1.0, 2.0)
    dblLen -= 2.0 * A * B * Math.cos(Math.toRadians(intAngle));
    
    System.out.print(sqrt(dblLen));
}

Compiler output:
Main.java:23: error: ';' expected
    dblLen += Math.pow(A * 1.0, 2.0)
                                    ^
Main.java:24: error: ';' expected
    dblLen += Math.pow(B * 1.0, 2.0)
                                    ^
Main.java:28: error: reached end of file while parsing
}
 ^
3 errors
Language: C++

#include <iostream>
#include <math.h>
using namespace std;
#define PI 3.14159265358979323846264338327950
int main(){
	int a, b, h, m;
	cin >> a >> b >> h >> m;
	rad = PI * 2 * (h/12 + m/720 - m/60)
	printf("%4.10f", sqrt(a*a + b*b - 2*a*b*cos(rad)));

}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'rad' was not declared in this scope; did you mean 'rand'?
    8 |         rad = PI * 2 * (h/12 + m/720 - m/60)
      |         ^~~
      |         rand
Language: C++

#include <iostream>
#include <math.h>
using namespace std;
#define PI 3.14159265358979323846264338327950L
int main(){
	int a, b, h, m;
	cin >> a >> b >> h >> m;
	rad = PI * 2 * (h/12 + (m/60)/12 - m/60)
	printf("%4.10f", sqrt(a*a + b*b - 2*a*b*cos(rad)));

}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'rad' was not declared in this scope; did you mean 'rand'?
    8 |         rad = PI * 2 * (h/12 + (m/60)/12 - m/60)
      |         ^~~
      |         rand
Language: C++

#include <iostream>
#include <math.h>
using namespace std;
#define PI 3.14159265358979323846264338327950L
int main(){
	int a, b, h, m;
	cin >> a >> b >> h >> m;
	rad = pi * 2 * (h/12 + (m/60)/12 - m/60)
	printf("%4.10f", sqrt(a*a + b*b - 2*a*b*cos(rad)));

}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'rad' was not declared in this scope; did you mean 'rand'?
    8 |         rad = pi * 2 * (h/12 + (m/60)/12 - m/60)
      |         ^~~
      |         rand
a.cc:8:15: error: 'pi' was not declared in this scope; did you mean 'PI'?
    8 |         rad = pi * 2 * (h/12 + (m/60)/12 - m/60)
      |               ^~
      |               PI
Language: C++

#include <iostream>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <list>
#include <set>
#include <queue>
#include <iterator>
#include <bitset>
#include <bits/stdc++.h>
#include <vector>
#include <cctype>
#include <algorithm>
#define ll             long long
#define _              ios_base::sync_with_stdio(0);cin.tie(0);
#define loop           for(i=0;i<n;i++)
#define pb             push_back
#define tc()           int t;cin>>t;while(t--) 
#define pi             acos(-1)         
 
using namespace std;
 
ll i,j,temp;

 
int main()
{_
    
   double A,B,M,H;
   double Hourangle,Minuteangle,angle,length;
   cin>>A>>B>>H>>M;

   if(H==12){
   	H = 0;
   }
   
   Hourangle = H*30 + ((5*M)/60)*6;

   if(M==60){
   	M = 0;
   }
   
   Minuteangle = M*6;

   angle = abs(Minuteangle - Hourangle);
   length = A*A + B*B - 2*A*B*cos(pi*angle/180);
   length = sqrt(length);
   if(angle == 180){
   	lenght = A+B;
   }
   printf("%lf\n",length);
   
 
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:49:9: error: 'lenght' was not declared in this scope; did you mean 'length'?
   49 |         lenght = A+B;
      |         ^~~~~~
      |         length
Language: C

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i < (n); i++)
using namespace std;
using ll=long long;

int main(){
  int a,b,h,m;
 static const double pi = 3.141592653589793;
  cin >> a >> b >> h >> m;
  double degree = abs(((double)h/12+(double)m/60/12))*360-((double)m/60*360);
//  cout << (double)2*a*b*cos(pi/180*degree) << endl;
//  cout << cos(pi/180*degree) << endl;
  printf("%.10f\n", (double)sqrt(a*a +b*b -2*a*b*cos(pi/180*degree)));
}



Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#define pi 2*asin(1.0)
 
int main() {

 long double angL;
 long double angS;
 long double t,s;
 long double ans;
 int  A,B,H,M;
 cin>>A>>B>>H>>M;

 angL=(H*60+M)/2;
 angS=M*6;

 s=abs(angL-angS);
 t=(s/180)*pi;

 ans=sqrt(A*A+B*B-2*A*B*cos(t));
 cout<<s<<endl;
 cout<<ans<<endl;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:2: error: 'cin' was not declared in this scope
   10 |  cin>>A>>B>>H>>M;
      |  ^~~
a.cc:15:4: error: 'abs' was not declared in this scope; did you mean 'ans'?
   15 |  s=abs(angL-angS);
      |    ^~~
      |    ans
a.cc:1:14: error: 'asin' was not declared in this scope
    1 | #define pi 2*asin(1.0)
      |              ^~~~
a.cc:16:12: note: in expansion of macro 'pi'
   16 |  t=(s/180)*pi;
      |            ^~
a.cc:18:25: error: 'cos' was not declared in this scope
   18 |  ans=sqrt(A*A+B*B-2*A*B*cos(t));
      |                         ^~~
a.cc:18:6: error: 'sqrt' was not declared in this scope
   18 |  ans=sqrt(A*A+B*B-2*A*B*cos(t));
      |      ^~~~
a.cc:19:2: error: 'cout' was not declared in this scope
   19 |  cout<<s<<endl;
      |  ^~~~
a.cc:19:11: error: 'endl' was not declared in this scope
   19 |  cout<<s<<endl;
      |           ^~~~
Language: C++

#include<iostream>
#include<string>
#include<cmath>

int main(){
  FAST;
  static const double pi = 3.141592653589793238462;
  int A,B,H,M;
  std::cin >> A >> B >> H >> M;

  long double X = (30*H+0.5*M);
  long double Y = (6*M);
  long double x1 = A * cos(pi/180*X);
  long double y1 = A * sin(pi/180*X);
  long double x2 = B * cos(pi/180*Y);
  long double y2 = B * sin(pi/180*Y);

  //std::cout << x1 << y1 << x2 << y2 << std::endl;

  long double a = std::pow(x1-x2,2.0);
  long double b = std::pow(y1-y2,2.0);

  long double c = std::sqrt(a+b);

  std::cout << c << std::endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: 'FAST' was not declared in this scope
    6 |   FAST;
      |   ^~~~
Language: C++

nclude <bits/stdc++.h>
using namespace std;

typedef  long long ll;
const double PI = acos(-1.0);


int main(){

    double a,b,h,m;
    cin>>a>>b>>h>>m;
    double x1 = h*30+m*0.5;
    double x2 = 6*m;
    double jd=fabs(x1-x2);
    if(jd>=180) jd = 360-jd;
    double g = jd*1.0/180.0*PI;
    double  ans = sqrt(a*a+b*b-2*a*b*cos(g));
    printf("%.15f\n",ans);
    return 0;
}


Compiler output:
a.cc:1:1: error: 'nclude' does not name a type
    1 | nclude <bits/stdc++.h>
      | ^~~~~~
a.cc:5:19: error: 'acos' was not declared in this scope
    5 | const double PI = acos(-1.0);
      |                   ^~~~
a.cc: In function 'int main()':
a.cc:11:5: error: 'cin' was not declared in this scope
   11 |     cin>>a>>b>>h>>m;
      |     ^~~
a.cc:14:15: error: 'fabs' was not declared in this scope
   14 |     double jd=fabs(x1-x2);
      |               ^~~~
a.cc:17:38: error: 'cos' was not declared in this scope
   17 |     double  ans = sqrt(a*a+b*b-2*a*b*cos(g));
      |                                      ^~~
a.cc:17:19: error: 'sqrt' was not declared in this scope
   17 |     double  ans = sqrt(a*a+b*b-2*a*b*cos(g));
      |                   ^~~~
a.cc:18:5: error: 'printf' was not declared in this scope
   18 |     printf("%.15f\n",ans);
      |     ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | nclude <bits/stdc++.h>
Language: Java

import java.util.*;
class Main{
  public static void main(String args[])
  {
    Scanner sc = new Scanner(System.in);
    int a=sc.nextInt();
    int b=sc.nextInt();
    int h=sc.nextInt();
    int m=sc.nextInt();
    
    int hdeg=30*h;
    int mdeg=6*m;
    int deg=Math.abs(hdeg-mdeg);
    double cosdeg=Math.cos(deg*Math.PI/180);
    double asrq=a*a;
    double bsqr=b*b;
    double c=Math.sqrt(asqr+bsqr-2*a*b*cosdeg);
    System.out.println(c);
  }
}


Compiler output:
Main.java:17: error: cannot find symbol
    double c=Math.sqrt(asqr+bsqr-2*a*b*cosdeg);
                       ^
  symbol:   variable asqr
  location: class Main
1 error
Language: Java

import java.util.*;
class Main{
  public static void main(String args[])
  {
    Scanner sc = new Scanner(System.in);
    int a=sc.nextInt();
    int b=sc.nextInt();
    int h=sc.nextInt();
    int m=sc.nextInt();
    
    int hdeg=30*h;
    int mdeg=6*m;
    int deg=Math.abs(hedg-mdeg);
    double cosdeg=Math.cos(deg*Math.pi/180);
    double asrq=a*a;
    double bsqr=b*b;
    double c=Math.sqrt(asr+bsqr-2*a*b*cosdeg);
    System.out.println(c);
  }
}

Compiler output:
Main.java:13: error: cannot find symbol
    int deg=Math.abs(hedg-mdeg);
                     ^
  symbol:   variable hedg
  location: class Main
Main.java:14: error: cannot find symbol
    double cosdeg=Math.cos(deg*Math.pi/180);
                                   ^
  symbol:   variable pi
  location: class Math
Main.java:17: error: cannot find symbol
    double c=Math.sqrt(asr+bsqr-2*a*b*cosdeg);
                       ^
  symbol:   variable asr
  location: class Main
3 errors
Language: C++

#include <bits/stdc++.h> 
using namespace std; 

int calcAngle(double h, double m) 
{ 
	
	if (h < 0 || m < 0 
		|| h > 12 || m > 60) 
		printf("Wrong input"); 

	if (h == 12) 
		h = 0; 
	if (m == 60) 
		m = 0; 
	int hour_angle = 0.5 * (h * 60 + m); 
	int minute_angle = 6 * m; 

	int angle = abs(hour_angle - minute_angle); 

	angle = min(360 - angle, angle); 

	return angle; 
} 


double cal_cos(float n) 
{ 
	double x1,denominator, cosx, cosval; 

	n = n * (3.142 / 180.0); 

	x1 = 1; 

	
	cosx = x1; 

	cosval = cos(n); 
	int i = 1; 
	do { 
		denominator = 2 * i * (2 * i - 1); 
		x1 = -x1 * n * n / denominator; 
		cosx = cosx + x1; 
		i = i + 1; 
	} while (0.00001 <= fabs(cosval - cosx)); 

	return cosx; 
} 

 
float distanceEndpoints( 
	int a, int b, float c) 
{ 
	float angle = cal_cos(c); 
	return sqrt((a * a) 
				+ (b * b) 
				- 2 * a * b * angle); 
} 


int main() 
{ 

	int hour ,min,hourHand,minHand;
  
  if (h == 12) 
        h = 0; 
    if (m == 60) 
        m = 0;
	
   cin>>hourHand>>minHand>>hour>>min;
	
	


	double angle = calcAngle(hour, min); 

	
	float distance = distanceEndpoints( 
		minHand, hourHand, angle); 
	cout << fixed<<setprecision(22)<<distance; 
	return 0; 
} 


Compiler output:
a.cc: In function 'int main()':
a.cc:65:7: error: 'h' was not declared in this scope
   65 |   if (h == 12)
      |       ^
a.cc:67:9: error: 'm' was not declared in this scope; did you mean 'tm'?
   67 |     if (m == 60)
      |         ^
      |         tm
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define fi(a) scanf("%d",&a);
#define fli(a) scanf("%ld",&a);
#define fll(a) scanf("%lld",&a);
#define pi(a) printf("%d\n",a);
#define ppi(i,a) printf("Case %d: %d\n",i,a);
#define ll long long
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

int main()
{
    fast
    double h,m,a,b;
    cin >> a >> b >> h >> m;
    double hour_angle = 0.5 * (h * 60 + m);
    double minute_angle = 6 * m;

    double angle = abs(hour_angle - minute_angle);
    angle = min(360 - angle, angle);
    cout << angle << endl;
    double c = sqrt(b*b + a*a - 2*a*b*cos(angle*(3.141592653589/180)) ;
    cout << setprecision(10) << fixed << c << endl;
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:22:70: error: expected ')' before ';' token
   22 |     double c = sqrt(b*b + a*a - 2*a*b*cos(angle*(3.141592653589/180)) ;
      |                    ~                                                 ^~
      |                                                                      )
Language: C++

#include <bits/stdc++.h>
using namespace std;

double A,B,M,H;

int main(){
  cin >> A >> B >> H >> M;
	double hrad, mrad;
  hrad = (H/12)*PI;
  mrad = (M/60)*PI;
  double a = (A*cos(hrad) - B*cos(mrad))*(A*cos(hrad) - B*cos(mrad));
    double b = (A*sin(hrad) - B*sin(mrad))*(A*sin(hrad) - B*sin(mrad));
  double c = sqrt(a*a + b*b);
  printf("%.9lf",c);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'PI' was not declared in this scope
    9 |   hrad = (H/12)*PI;
      |                 ^~
Language: C++

#include <bits/stdc++.h>

using namespace std;
long double a,b,h,m;
long double x1,y1,x2,y2;
const long double pi=acos(-1);
string s;
int main()
{
    cin>>a>>b>>h>>m;
    x1=sin(pi*2*(h*60+m)/12/60-pi/2)*a;
    y1=cos(pi*2*(h*60+m)/12/60-pi/2)*a;
    x2=sin(pi*2*m/60-pi/2)*b;
    y2=cos(pi*2*m/60-pi/2)*b;
    cout<<fixed<<setprecision(10)<<sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
    return 0;
}


Compiler output:
a.cc:5:16: error: 'long double y1' redeclared as different kind of entity
    5 | long double x1,y1,x2,y2;
      |                ^~
In file included from /usr/include/features.h:523,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/c++config.h:683,
                 from /usr/include/c++/14/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:33,
                 from a.cc:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:257:1: note: previous declaration 'double y1(double)'
  257 | __MATHCALL (y1,, (_Mdouble_));
      | ^~~~~~~~~~
a.cc: In function 'int main()':
a.cc:12:7: error: assignment of function 'double y1(double)'
   12 |     y1=cos(pi*2*(h*60+m)/12/60-pi/2)*a;
      |     ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:15:60: error: invalid operands of types 'long double' and 'double(double) noexcept' to binary 'operator-'
   15 |     cout<<fixed<<setprecision(10)<<sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
      |                                                          ~~^~~
      |                                                          |  |
      |                                                          |  double(double) noexcept
      |                                                          long double
a.cc:15:68: error: invalid operands of types 'long double' and 'double(double) noexcept' to binary 'operator-'
   15 |     cout<<fixed<<setprecision(10)<<sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
      |                                                                  ~~^~~
      |                                                                  |  |
      |                                                                  |  double(double) noexcept
      |                                                                  long double
Language: C++

int main()
{
	int A, B, H, M;
	cin >> A >> B >> H >> M;

	const double PI = 3.14159265358979323846;
	const double cir = 360.0;

	double thetaA = cir * ((H / 12.0) + (M / (12.0 * 60.0)));
	double thetaB = cir * (M / (60.0));

	double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));

	double rad = deltaDeg * PI / 180.0;

	//cout << cos(rad) << "\n";
	
	double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));

	cout << result;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'cin' was not declared in this scope
    4 |         cin >> A >> B >> H >> M;
      |         ^~~
a.cc:12:31: error: 'abs' was not declared in this scope
   12 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                               ^~~
a.cc:12:27: error: 'min' was not declared in this scope; did you mean 'main'?
   12 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                           ^~~
      |                           main
a.cc:18:30: error: 'pow' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                              ^~~
a.cc:18:68: error: 'cos' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                                                    ^~~
a.cc:18:25: error: 'sqrt' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                         ^~~~
a.cc:20:9: error: 'cout' was not declared in this scope
   20 |         cout << result;
      |         ^~~~
Language: C++

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

int main()
{
	int A, B, H, M;
	cin >> A >> B >> H >> M;

	const double PI = 3.14159265358979323846;
	const double cir = 360.0;

	double thetaA = cir * ((H / 12.0) + (M / (12.0 * 60.0)));
	double thetaB = cir * (M / (60.0));

	double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));

	double rad = deltaDeg * PI / 180.0;

	//cout << cos(rad) << "\n";
	
	double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));

	cout << result;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:30: error: 'pow' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                              ^~~
a.cc:23:68: error: 'cos' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                                                    ^~~
a.cc:23:25: error: 'sqrt' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                         ^~~~
Language: C

#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < n; i++)
using namespace std;
using ll        = long long;
using P         = pair<int, int>;
const double PI = acos(-1);

int main() {
    int A, B, H, M;
    cin >> A >> B >> H >> M;
    double x  = double(H * 60 + M) / 720 * 2 * PI;
    double tx = double(M) / 60 * 2 * PI;
    double ph = A * cos(x), qh = A * sin(x);
    double pm = B * cos(tx), qm = B * sin(tx);
    double dx = ph - pm, dy = qh - qm;
    double ans = sqrt(dx * dx + dy * dy);
    cout << fixed << setprecision(10) << ans << endl;
    return 0;
}


Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

int main()
{
	int A, B, H, M;
	cin >> A >> B >> H >> M;

	const double PI = 3.14159265358979323846;
	const double cir = 360.0;

	double thetaA = cir * (H / (12.0));
	double thetaB = cir * (M / (60.0));

	double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));

	double rad = deltaDeg * PI / 180.0;

	//cout << cos(rad) << "\n";
	
	double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));

	cout << result;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'cin' was not declared in this scope
    4 |         cin >> A >> B >> H >> M;
      |         ^~~
a.cc:12:31: error: 'abs' was not declared in this scope
   12 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                               ^~~
a.cc:12:27: error: 'min' was not declared in this scope; did you mean 'main'?
   12 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                           ^~~
      |                           main
a.cc:18:30: error: 'pow' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                              ^~~
a.cc:18:68: error: 'cos' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                                                    ^~~
a.cc:18:25: error: 'sqrt' was not declared in this scope
   18 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                         ^~~~
a.cc:20:9: error: 'cout' was not declared in this scope
   20 |         cout << result;
      |         ^~~~
Language: C++

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

int main()
{
	int A, B, H, M;
	cin >> A >> B >> H >> M;

	const double PI = 3.14159265358979323846;
	const double cir = 360.0;

	double thetaA = cir * (H / (12.0));
	double thetaB = cir * (M / (60.0));

	double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));

	double rad = deltaDeg * PI / 180.0;

	//cout << cos(rad) << "\n";
	
	double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));

	cout << result;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:30: error: 'pow' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                              ^~~
a.cc:23:68: error: 'cos' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                                                    ^~~
a.cc:23:25: error: 'sqrt' was not declared in this scope
   23 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                         ^~~~
Language: C++

	int A, B, H, M;
	cin >> A >> B >> H >> M;

	const double PI = 3.14159265358979323846;
	const double cir = 360.0;

	double thetaA = cir * (H / (12.0));
	double thetaB = cir * (M / (60.0));

	double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));

	double rad = deltaDeg * PI / 180.0;

	//cout << cos(rad) << "\n";
	
	double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));

	cout << result;

Compiler output:
a.cc:2:9: error: 'cin' does not name a type
    2 |         cin >> A >> B >> H >> M;
      |         ^~~
a.cc:10:31: error: 'abs' was not declared in this scope
   10 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                               ^~~
a.cc:10:53: error: 'abs' was not declared in this scope
   10 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                                                     ^~~
a.cc:10:27: error: 'min' was not declared in this scope
   10 |         double deltaDeg = min(abs(thetaA - thetaB), abs(thetaA - thetaB));
      |                           ^~~
a.cc:16:30: error: 'pow' was not declared in this scope
   16 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                              ^~~
a.cc:16:42: error: 'pow' was not declared in this scope
   16 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                          ^~~
a.cc:16:68: error: 'cos' was not declared in this scope
   16 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                                                                    ^~~
a.cc:16:25: error: 'sqrt' was not declared in this scope
   16 |         double result = sqrt(pow(A, 2) + pow(B, 2) - 2.0 * A * B * cos(rad));
      |                         ^~~~
a.cc:18:9: error: 'cout' does not name a type
   18 |         cout << result;
      |         ^~~~
Language: C

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
 
void solve() {
	int a,b,h,m;
	cin>>a>>b>>h>>m;
	double hd,md;
	double pi=4*atan(1.0);
	hd=(double)((h*60+m)%720)/720*2*pi;
	md=(double)m/60*2*pi;
	double ddeg=abs(hd-md);
	double c=a*a+b*b-2*a*b*cos(ddeg);
	c=sqrt(c);
	cout<<setprecision(16)<<c<<"\n";
}
 
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	solve();
	return 0;
}

Compiler output:
main.c:1:10: fatal error: bits/stdc++.h: No such file or directory
    1 | #include <bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
#include <cmath>
#include <stdio.h>
 
long double LoC(long double a, long double b, double C) {
  //余弦定理 a^2+b^2-2abcosC = c^2
  static const double pi = 3.141592653589793;
  //std::cout << C / 180 << std::endl; 
  //std::cout << cos(pi*(C / 180)) << std::endl;
  return sqrtl(a * a + b * b - 2 * a*b*cos(pi*(C / 180.0)));
}
 
void funcC() {
  double a, b;
  double int h, m;
  std::cin >> a >> b >> h >> m;
  double temp = abs(m * 6 - (h * 30 + m * 0.5));
  double theta = temp > 180 ? 360 - temp : temp;
  //std::cout << theta << std::endl;
  printf("%.15Lf",LoC(a, b, theta));
 
}
 
int main(void) {
  funcC();
  return 0;
} 

Compiler output:
a.cc: In function 'void funcC()':
a.cc:15:3: error: two or more data types in declaration of 'h'
   15 |   double int h, m;
      |   ^~~~~~
a.cc:15:3: error: two or more data types in declaration of 'm'
a.cc:16:25: error: 'h' was not declared in this scope
   16 |   std::cin >> a >> b >> h >> m;
      |                         ^
a.cc:16:30: error: 'm' was not declared in this scope
   16 |   std::cin >> a >> b >> h >> m;
      |                              ^
Language: C++

#include<iostream>
#include<math>
#include<iomanip>
#define ll long long int
using namespace std;

int main()
{
  int a,b,h,m;
  cin >> a >> b >> h >> m;
  int ang;
  if(m == 0)
    ang = (12-h)*30;
  else
    ang = (abs(h-(m/5))*30)+(m/2);
  double c = (pow(a,2) + pow(b,2) - (2*a*b*cos(ang)));
  cout << fixed << setprecision(21) << sqrt(c);
}

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

/* ex4_2
   offNaria */
#include <stdio.h>
#include <math.h>
#include <stdlib.h>

double cosFormula(int a, int b, double c);

int main(void){
  int lengthOfMinuteHand, lengthOfHourHand, hour, minute;
  scanf("%d %d %d %d", &lengthOfMinuteHand, &lengthOfHourHand, &hour, &minute);
  pdouble angle = fabs((double)30 * hour + minute / 2 - 6 * minute); //時針は60分で30度＝1分で0.5度，分針は1分で6度動く
  if(angle - 180 > 0){
    angle = 360 - angle; //なす角は180度以下
  }
  angle = angle * M_PI / 180; //ラジアンに変換
  printf("%.10lf\n", cosFormula(lengthOfMinuteHand, lengthOfHourHand, angle)); //余弦定理
  return 0;
}

double cosFormula(int a, int b, double c){
  return sqrt(pow(a, 2) + pow(b, 2) - 2 * a * b * cos(c)); //余弦定理
}


Compiler output:
main.c: In function 'main':
main.c:12:3: error: unknown type name 'pdouble'; did you mean 'double'?
   12 |   pdouble angle = fabs((double)30 * hour + minute / 2 - 6 * minute); //時針は60分で30度＝1分で0.5度，分針は1分で6度動く
      |   ^~~~~~~
      |   double
Language: C

/* ex 4-2
    kas056 */
#include <stdio.h>
#include <math.h>

int main(void){
    int a,b,hour,minute;
    double omega1,omega2,omega,length;

    scanf("%d %d %d %d", &a,&b,&hour,&minute);//入力読み取り

    omega1 = 2*M_PI * (hour+ minute / 60.0) / 12;//短針が動いた角度
    omega2 = 2*M_PI *minute / 60.0;//長針が動いた角度
    omega = fabs(omega1-omega2);//角の差の絶対値を取り、成す角を求める

    //余弦定理の適応
    //長針と短針のなす角を、180゜を境に、余弦定理に用いる角の表し方を変える
    
    length = sqrt(pow(a,2) + pow(b,2) - 2*A*B*cos(omega));
    
    //10^-10まで出力
    printf("%.10lf",length);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:19:43: error: 'A' undeclared (first use in this function)
   19 |     length = sqrt(pow(a,2) + pow(b,2) - 2*A*B*cos(omega));
      |                                           ^
main.c:19:43: note: each undeclared identifier is reported only once for each function it appears in
main.c:19:45: error: 'B' undeclared (first use in this function)
   19 |     length = sqrt(pow(a,2) + pow(b,2) - 2*A*B*cos(omega));
      |                                             ^
Language: C

/* ex 4-2
    kas056 */
#include <stdio.h>
#include <math.h>

int main(void){
    int a,b,hour,minute;
    double omega1,omega2,omega,length;

    scanf("%d %d %d %d", &a,&b,&hour,&minute);//入力読み取り

    omega1 = 2*M_PI * (hour+ minute / 60.0) / 12;//短針が動いた角度
    omega2 = 2*M_PI *minute / 60.0;//長針が動いた角度
    omega = fabs(omega1-omega2);//角の差の絶対値を取り、成す角を求める

    //余弦定理の適応
    //長針と短針のなす角を、180゜を境に、余弦定理に用いる角の表し方を変える
    
    length = sqrt(pow(A,2) + pow(B,2) - 2*A*B*cos(omega));
    
    //10^-10まで出力
    printf("%.10lf",length);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:19:23: error: 'A' undeclared (first use in this function)
   19 |     length = sqrt(pow(A,2) + pow(B,2) - 2*A*B*cos(omega));
      |                       ^
main.c:19:23: note: each undeclared identifier is reported only once for each function it appears in
main.c:19:34: error: 'B' undeclared (first use in this function)
   19 |     length = sqrt(pow(A,2) + pow(B,2) - 2*A*B*cos(omega));
      |                                  ^
Language: C

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

int main(void){
  int len_hour_hand,len_minute_hand,hour,minute;
  double diff_rad,distance;
  scanf("%d %d %d %d",&len_hour_hand,&len_minute_hand,&hour,&minute);
  diff_rad = 11*M_PI*(60*hour+minute)/360;
  distance = sqrt(pow(len_hour_hand,2)+pow(len_minute_hand,2)
                  -2*len_hour_hand*len_minute_hand*cos(diff_rad));
  printf("%f\n",distance);
  return 0;
}

Compiler output:
/usr/bin/ld: /tmp/ccvlUaLw.o: in function `main':
main.c:(.text+0x84): undefined reference to `pow'
/usr/bin/ld: main.c:(.text+0xaf): undefined reference to `pow'
/usr/bin/ld: main.c:(.text+0xe3): undefined reference to `cos'
/usr/bin/ld: main.c:(.text+0x100): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
Language: C

/* kadai4_2
   Saikyo_Kazune
*/
#include <stdio.h>
#include<math.h>

int main(void){
    //πを定数として宣言
    const double PI = 3.14159265358;
   //int型　hour_hand_length,min_hand_length,hour,min宣言
   int hour_hand_length,min_hand_length,hour,min;
   //標準入力から受け取り
   scanf("%d %d %d %d",&hour_hand_length,&min_hand_length,&hour,&min);
   //hour時min分のとき時針は度数法で(hour*30+min*0.5)分針は(min*6)度 真上より時計回りに動いている
   //余弦定理で時針分針の間の角の対辺の長さの二乗を求め、平方根を取る
   //ただしcosは偶関数であるから間の角度の正負は無視してよい
   printf("%.10lf\n",sqrt(pow(hour_hand_length,2.0)+pow(min_hand_length,2.0)-2*hour_hand_length*min_hand_length*cos(PI*(hour*30+min*0.5-min*6)/180)) );
   return 0;

Compiler output:
main.c: In function 'main':
main.c:18:4: error: expected declaration or statement at end of input
   18 |    return 0;
      |    ^~~~~~
Language: C

/*ex4_2
ryo_1129*/
#include<stdio.h>
#include<math.h>
//プロトタイプ宣言
double distance(int length_hour,int length_minute,double rad);

int main(void){
    //変数宣言
    int A,B,H,M;
    double radhour,radminute,rad,length;
    //入力
    scanf("%d %d %d %d",&A,&B,&H,&M);
    //演習率πを決める。
    const double pi = 3.14159265358979;
    //時針、分針を求める。
    radlong = 2*pi*M/60;
    radshort = 2*pi*(H*60+M)/720;
    //角度の差を求める。cos(θ)=cos(-θ)に注意
    rad = radhour - radminute;
    //長さを求める。関数の呼び出し
    length = distance(A,B,rad);
    //出力
    printf("%.9f\n",length);
    return 0;
}
//時針と分針の長さと角度から端点間の長さを求める。引数、時針の長さ、分針の長さ、それらのなす角度
double distance(int length_hour,int length_minute,double rad){
    double length;//変数宣言
    //余弦定理を用いて端点間の長さを求める
    length = sqrt(pow(length_hour,2)+pow(length_minute,2)-2*length_hour*length_minute*cos(rad));
    // 端点間の長さを返す
    return length;
}

Compiler output:
main.c: In function 'main':
main.c:17:5: error: 'radlong' undeclared (first use in this function)
   17 |     radlong = 2*pi*M/60;
      |     ^~~~~~~
main.c:17:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:5: error: 'radshort' undeclared (first use in this function)
   18 |     radshort = 2*pi*(H*60+M)/720;
      |     ^~~~~~~~
Language: C

/* ex4_1
   YSK722 */

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

int main(void){
    double short_hand, long_hand, hour, minute, ans, angle_diff;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    
    angle_diff = 2 * M_PI * ((hour + minute/60.0) / 12 - minute / 60)
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(
              pow(short_hand, 2) + pow(long_hand, 2) \
              - 2 * short_hand * long_hand * cos(angle_diff)
          );
    printf("%lf", ans);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:70: error: expected ';' before 'ans'
   11 |     angle_diff = 2 * M_PI * ((hour + minute/60.0) / 12 - minute / 60)
      |                                                                      ^
      |                                                                      ;
......
   14 |     ans = sqrt(
      |     ~~~
Language: C

/* ex4_1
   YSK722 */

#include <math.h>
#include <stdio.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = double sqrt(
              pow(short_hand, 2) + pow(long_hand, 2) \
              - 2 * short_hand * long_hand * cos(PI*(hour/6 - minute/30))
          );
    printf("%lf", ans);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:11: error: expected expression before 'double'
   13 |     ans = double sqrt(
      |           ^~~~~~
Language: C

/* ex4_1
   YSK722 */

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

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    const double PI = 3.14159265358979;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:14:44: error: called object 'PI' is not a function or function pointer
   14 |         - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
      |                                            ^~
main.c:9:18: note: declared here
    9 |     const double PI = 3.14159265358979;
      |                  ^~
Language: C

/* ex4_1
   YSK722 */

#define PI 3.14159265358979
#include <math.h>
#include <stdio.h>

int main(void){
    double short_hand, long_hand, hour, minute, ans, PI;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:12: error: expected identifier or '(' before numeric constant
    4 | #define PI 3.14159265358979
      |            ^~~~~~~~~~~~~~~~
main.c:9:54: note: in expansion of macro 'PI'
    9 |     double short_hand, long_hand, hour, minute, ans, PI;
      |                                                      ^~
main.c:4:12: error: called object is not a function or function pointer
    4 | #define PI 3.14159265358979
      |            ^~~~~~~~~~~~~~~~
main.c:14:44: note: in expansion of macro 'PI'
   14 |         - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
      |                                            ^~
Language: C

/* ex4_1
   YSK722 */

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

int main(void){
    double short_hand, long_hand, hour, minute, ans, M_PI;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
    printf("%lf", ans);
    return 0;
}

Compiler output:
In file included from main.c:4:
main.c: In function 'main':
main.c:8:54: error: expected identifier or '(' before numeric constant
    8 |     double short_hand, long_hand, hour, minute, ans, M_PI;
      |                                                      ^~~~
main.c:13:44: error: called object is not a function or function pointer
   13 |         - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
      |                                            ^~~~
Language: C

/* ex4_1
   YSK722 */

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

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
    printf("%lf", ans);
    return 0;
}

Compiler output:
In file included from main.c:5:
main.c: In function 'main':
main.c:14:44: error: called object is not a function or function pointer
   14 |         - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
      |                                            ^~~~
Language: C

/* ex4_1
   YSK722 */

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

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
    printf("%lf", ans);
    return 0;
}

Compiler output:
In file included from main.c:5:
main.c: In function 'main':
main.c:13:44: error: called object is not a function or function pointer
   13 |         - 2 * short_hand * long_hand * cos(M_PI(hour/6 - minute/30)));
      |                                            ^~~~
Language: C

/* ex4_1
   YSK722 */

#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
}

Compiler output:
main.c: In function 'main':
main.c:6:12: error: called object is not a function or function pointer
    6 | #define PI 3.14159265358979
      |            ^~~~~~~~~~~~~~~~
main.c:14:44: note: in expansion of macro 'PI'
   14 |         - 2 * short_hand * long_hand * cos(PI(hour/6 - minute/30)));
      |                                            ^~
Language: C

/* ex4_1
   YSK722 */

#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * double cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
}

Compiler output:
main.c: In function 'main':
main.c:14:40: error: expected expression before 'double'
   14 |         - 2 * short_hand * long_hand * double cos(PI(hour/6 - minute/30)));
      |                                        ^~~~~~
Language: C

/* ex4_1
   YSK722 */

#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%lf %lf %lf %lf", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * double cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
}

Compiler output:
main.c: In function 'main':
main.c:13:11: error: expected expression before 'double'
   13 |     ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
      |           ^~~~~~
Language: C

/* ex4_1
   YSK722 */

#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%d %d %d %d", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * double cos(PI(hour/6 - minute/30)));
    printf("%lf", ans);
}

Compiler output:
main.c: In function 'main':
main.c:13:11: error: expected expression before 'double'
   13 |     ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
      |           ^~~~~~
Language: C

/* ex4_1
   YSK722 */

#include <stdio.h>
#include <math.h>
#define PI 3.14159265358979

int main(void){
    double short_hand, long_hand, hour, minute, ans;
    scanf("%d %d %d %d", &short_hand, &long_hand, &hour, &minute);
    /* 余弦定理を用いる
       cos(-x) = cos(x)より、回転角の大小は考えない */
    ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
        - 2 * short_hand * long_hand * double cos(PI(hour/6 - minute/30)))
    printf("%lf", ans);
}

Compiler output:
main.c: In function 'main':
main.c:13:11: error: expected expression before 'double'
   13 |     ans = double sqrt(pow(short_hand, 2) + pow(long_hand, 2) \
      |           ^~~~~~
Language: C++

/*
*  Problem Link: https://atcoder.jp/contests/abc168/tasks/abc168_c
*  Author: Raunak Sett
*/
#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long 
#define vi vector<int>
int main() {
    IOS
    // Code Here
    int a,b,h,m;
    cin>>a>>b>>h>>m;

    long double mh = m / 5.0;
    long double hh = h + (m/60.0);
    long double angle = PI * 2 * ((long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
    long double ans = 0.0;
    ans = (long double) (a*a + b*b) - (long double) (2.0*a*b*cosf(angle));
    ans = sqrtf(ans);
    
    printf("%20.20Lf\n", ans);

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:25: error: 'PI' was not declared in this scope
   18 |     long double angle = PI * 2 * ((long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long double)m / 60.0);
      |                         ^~
Language: C

1 #include <stdio.h>
2 #include <math.h>
3
4 #define PI 3.14159265358979323846264338327950L
5
6 int main(void) {
7 int a, b, h, m;
8 scanf("%d%d%d%d", &a, &b, &h, &m);
9
10 long double rad = PI * 2 * (
11 (long double)h / 12.0 + ((long double)m / 60.0) / 12.0 - (long
double)m / 60.0);
12
13 long double rsq = (long double)(a * a + b * b) - (long double)(2 * a *
b) * cosl(rad);
14
15 printf("%20.20Lf\n", sqrtl(rsq));
16
17 return 0;
18 }


Compiler output:
main.c:1:1: error: expected identifier or '(' before numeric constant
    1 | 1 #include <stdio.h>
      | ^
main.c:1:3: error: stray '#' in program
    1 | 1 #include <stdio.h>
      |   ^
main.c:2:3: error: stray '#' in program
    2 | 2 #include <math.h>
      |   ^
main.c:4:3: error: stray '#' in program
    4 | 4 #define PI 3.14159265358979323846264338327950L
      |   ^
Language: C++

/*
*  Problem Link: https://atcoder.jp/contests/abc168/tasks/abc168_c
*  Author: Raunak Sett
*/
#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long 
#define vi vector<int>
int main() {
    IOS
    // Code Here
    int a,b,h,m;
    cin>>a>>b>>h>>m;

    double mh = m / 5.0;
    double hh = h + (m/60.0);
    double angle = abs(hh - mh)*30.0;

    cout<<"angle"<<angle<<endl;
    if (angle > 180) angle = 360 - angle;
    double ans == 0.0;
    if (angle === 0 || angle == 180) {
        printf("%.20f", ans);
    } else {
        angle = angle * M_PI / 180.0;
        ans = a*a + b*b - 2.0*a*b*cosf(angle);
        ans = sqrtf(ans);
        printf("%.20f\n", ans);
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:16: error: expected initializer before '==' token
   22 |     double ans == 0.0;
      |                ^~
a.cc:23:17: error: expected primary-expression before '=' token
   23 |     if (angle === 0 || angle == 180) {
      |                 ^
a.cc:24:25: error: 'ans' was not declared in this scope; did you mean 'abs'?
   24 |         printf("%.20f", ans);
      |                         ^~~
      |                         abs
a.cc:27:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   27 |         ans = a*a + b*b - 2.0*a*b*cosf(angle);
      |         ^~~
      |         abs
Language: Java

import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
  		int A = sc.nextInt();
  		int B = sc.nextInt();
  		int H = sc.nextInt();
  		int M = sc.nextInt();
  
  		double kakudoTansin = 30 * H + 0.5 * M;
  		double kakudoTyousin = 6 * M;
  		double kakudo = Math.abs(kakudoTansin - kakudoTyousin);
  		if(kakudo > 180){
        		kakudo -= 180;
        }
  		double cnizyou = A * A + B * B - 2 * A * B * Math.cos(kakudo * (Math.pi/180));
        double c = Math.sqrt(cnizyou);
  		System.out.println(c);
	}
}

Compiler output:
Main.java:17: error: cannot find symbol
  		double cnizyou = A * A + B * B - 2 * A * B * Math.cos(kakudo * (Math.pi/180));
  		                                                                    ^
  symbol:   variable pi
  location: class Math
1 error
Language: C

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
int main()
{
	int a,b,h,m;
	double ans,kon;
	scanf("%d%d%d%d",&a,&b,&h,&m);
	h=h*30;
	dpuble g;
	
	g=h+m/2.0;
	m=m*6;
	kon=abs(g-m);
	kon=kon*3.14159265/180.0;
	
	
	ans=a*a+b*b-2*a*b*cos(kon);
	ans=sqrt(ans);
	printf("%lf\n",ans);
	return 0;
}
	
	

Compiler output:
main.c: In function 'main':
main.c:10:9: error: unknown type name 'dpuble'; did you mean 'double'?
   10 |         dpuble g;
      |         ^~~~~~
      |         double
Language: C++

#include <bits/stdc++.h>
using namespace std;
// clang-format off
const double PI=3.14159265358979323846;
using LL = long long;
#define COUT(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << endl

#define REP(i,x) for(int i=0;i<(int)(x);i++)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();i++)
#define RFOR(i,c) for(__typeof((c).rbegin())i=(c).rbegin();i!=(c).rend();i++)
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
 
template<class T> ostream& operator<<(ostream &os, const vector<T> &t) {
os<<"["; FOR(it,t) {if(it!=t.begin()) os<<","; os<<*it;} os<<"]"; return os;
}
template<class T> ostream& operator<<(ostream &os, const set<T> &t) {
os<<"{"; FOR(it,t) {if(it!=t.begin()) os<<","; os<<*it;} os<<"}"; return os;
}
template<class S, class T> ostream& operator<<(ostream &os, const pair<S,T> &t) { return os<<"("<<t.first<<","<<t.second<<")";}
// clang-format on

void solve(long long A, long long B, long long H, long long M) {
  // solver code

  double angle_H = (double)H / 12.0 * 360.0 + 30.0 * (M / 60.0);
  double angle_M = (double)M / 60.0 * 360.0;

  double angle_diff = abs(angle_H - angle_M);

  // COUT(angle_diff);
  // COUT(A);
  // COUT(B);
  //
  double distance = sqrt(A * A + B * B - 2 * A * B * cos(angle_diff / 180 * PI));

  cout << fixed << setprecision(10);
  cout << distance << endl;
}

int main() {
  cout << std::fixed << std::setprecision(15) << y << endl;
  long long A;
  scanf("%lld", &A);
  long long B;
  scanf("%lld", &B);
  long long H;
  scanf("%lld", &H);
  long long M;
  scanf("%lld", &M);
  solve(A, B, H, M);
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:41:50: error: 'y' was not declared in this scope; did you mean 'yn'?
   41 |   cout << std::fixed << std::setprecision(15) << y << endl;
      |                                                  ^
      |                                                  yn
Language: C++

#include<iostream>
#include<cstring>
#include<iomanip>
#define _USE_MATH_DEFINES
#include<cmath>
using namespace std;
int main()
{
	int a,b,hour,min;
	cin>>a>>b>>hour>>min;
	double hd=30*hour+min*0.5;
	double md=6*min;
	double du=fbs(hd-md);
	if(du>180)
	du=360-180;
	double ans=sqrt(a*a+b*b-2*a*b*cos(M_PI*du/180));
	cout<<fixed<<setprecision(20)<<ans;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:13:19: error: 'fbs' was not declared in this scope; did you mean 'ffs'?
   13 |         double du=fbs(hd-md);
      |                   ^~~
      |                   ffs