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

#include <bits/stdc++.h>
using namespace std;
int main() {
  cin >> int r;
  cout << r*r << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   cin >> int r;
      |          ^~~
a.cc:5:11: error: 'r' was not declared in this scope
    5 |   cout << r*r << endl;
      |           ^
Language: C++

#include <bits/stdc+.h>
using namespace std;
int main() {
  cin >> int r;
  cout << r*r << endl;
}

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

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin >> r;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:6:5: error: 'cout' was not declared in this scope
    6 |     cout << r * r << endl;
      |     ^~~~
a.cc:6:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:22: error: 'endl' was not declared in this scope
    6 |     cout << r * r << endl;
      |                      ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin >> r;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:6:3: error: 'cout' was not declared in this scope
    6 |   cout << r * r << endl;
      |   ^~~~
a.cc:6:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:20: error: 'endl' was not declared in this scope
    6 |   cout << r * r << endl;
      |                    ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

#include<bits/stdc++.h>
using namepace std;
int main()
{
  int r;
  cin>>r;
  cout<<r*r;
  return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namepace'
    2 | using namepace std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin>>r;
      |   ^~~
      |   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:7:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   cout<<r*r;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.Scanner;

public class Hankei {

	public static void main(String[] args)
	{

		Scanner scan = new Scanner(System.in);
		int r=scan.nextInt();
		double a,b,c;
		a=r*r*Math.PI;
		b=Math.PI;
		c=a/b;
		System.out.print((int)c);
		scan.close();
	}
}

Compiler output:
Main.java:3: error: class Hankei is public, should be declared in a file named Hankei.java
public class Hankei {
       ^
1 error
Language: Java

public class Hankei {

	public static void main(String[] args)
	{
		double r=2;
		double a,b,c;
		a=r*r*Math.PI;
		b=Math.PI;
		c=a/b;
		System.out.print((int)c);

	}
}


Compiler output:
Main.java:1: error: class Hankei is public, should be declared in a file named Hankei.java
public class Hankei {
       ^
1 error
Language: Java

import java.util.*;

public class Solution{
  public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
    	int radius = sc.nextInt();
    	System.out.println(3.1415 * radius * radius);
  }
}

Compiler output:
Main.java:3: error: class Solution is public, should be declared in a file named Solution.java
public class Solution{
       ^
1 error
Language: C++

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

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)   FOR(i,0,n)
#define ALL(a)     (a).begin(),(a).end()
#define PRINT(a)   cout << (a) << endl
#define RALL(v) rbegin(v), rend(v)

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define Fi first
#define Se second

#define debug(x) cerr << x << " " << "(L:" << __LINE__ << ")" << '\n';

using ll = long long int;
using P = pair<int,int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using pii = pair<int, int>;

template <typename T> using PQ = priority_queue<T>;
template <typename T> using minPQ = priority_queue<T, vector<T>, greater<T>>;

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

const int INF = 1001001001;
const ll LINF = 1001001001001001001ll;
const int MOD = 1e9 + 7;

int main(){
  int r;
  cin >> r;
  PRINT(c*c);
}



Compiler output:
a.cc: In function 'int main()':
a.cc:38:9: error: 'c' was not declared in this scope
   38 |   PRINT(c*c);
      |         ^
a.cc:7:29: note: in definition of macro 'PRINT'
    7 | #define PRINT(a)   cout << (a) << endl
      |                             ^
Language: C++

using namespace std;

int main() {
	int r;
	cin >> r;
	cout << r * r <<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin >> r;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:6:9: error: 'cout' was not declared in this scope
    6 |         cout << r * r <<"\n";
      |         ^~~~
a.cc:6:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C

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

int main() {
  int r;
  cin >> r;
  
  cout << r*r << endl;
}


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

int main() {
  int r;
  cin >> r;
  
  cout << r * r << endl;
}


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<bits.stdc++.h>
using namespace std;
int main(){
	int a;
  cin >> a;
  cout << a * a <<endl;
}

Compiler output:
a.cc:1:9: fatal error: bits.stdc++.h: No such file or directory
    1 | #include<bits.stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
int main()
{ 
  long long a;
  cin>> a;
  cout <<a*a;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin>> a;
      |   ^~~
      |   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:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout <<a*a;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int r = scanner.nextInt();
        System.out.println((int) Math.pow(r, 2));
    }
}


Compiler output:
Main.java:3: error: class Test is public, should be declared in a file named Test.java
public class Test {
       ^
1 error
Language: C++

#incldue<bits/stdc++.h>
using namespace std;
int main()
{
  int n;
  cin>>n;
  cout<<pow(n,2);
  return 0;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue<bits/stdc++.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin>>n;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incldue<bits/stdc++.h>
a.cc:7:3: error: 'cout' was not declared in this scope
    7 |   cout<<pow(n,2);
      |   ^~~~
a.cc:7:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:9: error: 'pow' was not declared in this scope
    7 |   cout<<pow(n,2);
      |         ^~~
Language: C

#include<stdio.h>

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

Compiler output:
main.c: In function 'main':
main.c:5:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    5 |         scanf_s("%d",&r);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
using namespace std;
int main() {
	cin >> r;
    cout << r * r << "\n";
  	return 0;
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:4:16: error: 'r' was not declared in this scope
    4 |         cin >> r;
      |                ^
Language: Java

public class Calc
{
    public static void main(String[] args) throws IOException
    {
        int ans = 0;
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);

        String str = null;

        str = br.readLine();

        int r = Integer.parseInt(str);

        ans = r*r;

        System.out.println(ans);
    }

}

Compiler output:
Main.java:1: error: class Calc is public, should be declared in a file named Calc.java
public class Calc
       ^
Main.java:3: error: cannot find symbol
    public static void main(String[] args) throws IOException
                                                  ^
  symbol:   class IOException
  location: class Calc
Main.java:6: error: cannot find symbol
        InputStreamReader isr = new InputStreamReader(System.in);
        ^
  symbol:   class InputStreamReader
  location: class Calc
Main.java:6: error: cannot find symbol
        InputStreamReader isr = new InputStreamReader(System.in);
                                    ^
  symbol:   class InputStreamReader
  location: class Calc
Main.java:7: error: cannot find symbol
        BufferedReader br = new BufferedReader(isr);
        ^
  symbol:   class BufferedReader
  location: class Calc
Main.java:7: error: cannot find symbol
        BufferedReader br = new BufferedReader(isr);
                                ^
  symbol:   class BufferedReader
  location: class Calc
6 errors
Language: C++

#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
#define rep(i ,n) for(int i = 0 ; i < (n) ; i ++ )
#define mp(x,y) make_pair(x,y)
#define all(x) (x).begin(),(x).end()
using namespace std;
using ll = long long;
using vin=vector<int>;
using P = pair<int, int>;
const int inf=1e9+7;
const ll INF=1e18;

int main() {
  int r;
  cin>>>r;
  cout<<r*r<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:8: error: expected primary-expression before '>' token
   15 |   cin>>>r;
      |        ^
Language: C

#include<stdio.h>
using namespace std;

int main() {
  int r;
  int circle = 0;
  scanf("%d",&r);
  circle = r * r;
  printf("%d",circle);
  return 0;
}

Compiler output:
main.c:2:1: error: unknown type name 'using'
    2 | using namespace std;
      | ^~~~~
main.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    2 | using namespace std;
      |                 ^~~
Language: C

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

int main() {
  int r;
  int circle = 0;
  scanf("%d",&r);
  circle = r * r;
  printf("%d",circle);
  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 <vector>
#include <cstdlib>  
#include <algorithm>
#include <string>

using namespace std;
 
int main() {
   int a:
  cin >>a;
  cout<<a*a;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: found ':' in nested-name-specifier, expected '::'
   10 |    int a:
      |         ^
      |         ::
a.cc:10:8: error: 'a' has not been declared
   10 |    int a:
      |        ^
a.cc:11:7: error: qualified-id in declaration before '>>' token
   11 |   cin >>a;
      |       ^~
a.cc:12:9: error: 'a' was not declared in this scope
   12 |   cout<<a*a;
      |         ^
Language: C++

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
	//半径
	int r;
	cin >> r;
	cout << r*r;
    return 0;
}


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

#include <bits.stdc++.h>
using namespace std;
int main() {
  int r;
  cin >> r;
  cout << r*r << endl;
}

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

    int r;
    cin >> r;
    cout << r * r << endl;
    return 0;

Compiler output:
a.cc:2:5: error: 'cin' does not name a type
    2 |     cin >> r;
      |     ^~~
a.cc:3:5: error: 'cout' does not name a type
    3 |     cout << r * r << endl;
      |     ^~~~
a.cc:4:5: error: expected unqualified-id before 'return'
    4 |     return 0;
      |     ^~~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <numeric>

using namespace std;


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


Compiler output:
a.cc: In function 'int main()':
a.cc:15:13: error: 'pow' was not declared in this scope
   15 |     cout << pow(r, 2) << endl;
      |             ^~~
Language: C++

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin >> r;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:6:9: error: 'cout' was not declared in this scope
    6 |         cout << r * r << endl;
      |         ^~~~
a.cc:6:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:26: error: 'endl' was not declared in this scope
    6 |         cout << r * r << endl;
      |                          ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: C++

#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define pii pair<int,int>
const long long MOD=1e9+7;

int main() {
  itn r;
  cin>>r;
  cout<<r*r<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'itn' was not declared in this scope; did you mean 'int'?
    9 |   itn r;
      |   ^~~
      |   int
a.cc:10:8: error: 'r' was not declared in this scope
   10 |   cin>>r;
      |        ^
Language: C++

#include <iostream>
using namespace std;

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


Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: expected ';' before 'cout'
    6 |   cin >> r
      |           ^
      |           ;
    7 |     cout << r*r << endl;
      |     ~~~~
Language: C++

#include <iostream>

int main(){
	int r;
  cin << r
    return r*r;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin << r
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
Language: C++

#include <iostream>

int main()
 {
   int r;
   cin >> r;
   cout << r*r;
   
   return 0;
 }

Compiler output:
a.cc: In function 'int main()':
a.cc:6:4: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |    cin >> r;
      |    ^~~
      |    std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:4: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |    cout << r*r;
      |    ^~~~
      |    std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int r = sc.nextInt();
    System.out.println(problem145a(r));
}

private static int problem145a(int r) {
    return r * r;
}

Compiler output:
Main.java:13: error: reached end of file while parsing
}
 ^
1 error
Language: Java

import java.util.Scanner;

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int r = sc.nextInt();
    System.out.println(problem145a(r));
}

private static int problem145a(int r) {
    return r * r;
}

Compiler output:
Main.java:3: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String[] args) {
              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: Java

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int r = sc.nextInt();
    System.out.println(problem145a(r));
}

private static int problem145a(int r) {
    return r * r;
}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String[] args) {
              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: C++

#include <iostream>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:21: error: expected primary-expression before ',' token
    7 |         cout << r*r<,endl;
      |                     ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

using lint = long long;

#define MOD_NUMBER 1000000007

template <class T> void vector_print(vector<T> vec) {
  for (unsigned int i = 0; i < vec.size(); i++) {
    cout << vec.at(i);
    if (i < vec.size()-1) {
      cout << " ";
    } else if (i == vec.size()-1) {
      cout << endl;
    }
  }
}

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


Compiler output:
a.cc: In function 'int main()':
a.cc:21:3: error: 'll' was not declared in this scope
   21 |   ll r;
      |   ^~
a.cc:22:10: error: 'r' was not declared in this scope
   22 |   cin >> r;
      |          ^
Language: C

#include <stdio.h>

int mian(void){
    int r;
    r*r;
    return 0;

}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C

#include<stdio.h>

int main(void)
}
int r;
printf("%d\n",r / r);

return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:1: error: expected declaration specifiers before '}' token
    4 | }
      | ^
main.c:6:1: error: expected declaration specifiers before 'printf'
    6 | printf("%d\n",r / r);
      | ^~~~~~
main.c:8:1: error: expected declaration specifiers before 'return'
    8 | return 0;
      | ^~~~~~
main.c:9:1: error: expected declaration specifiers before '}' token
    9 | }
      | ^
main.c:3:5: error: old-style parameter declarations in prototyped function definition
    3 | int main(void)
      |     ^~~~
main.c:10: error: expected '{' at end of input
Language: C

#include<stdio.h>

int main(void)
}
int r;
printf("%d\n",r/r);

return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:1: error: expected declaration specifiers before '}' token
    4 | }
      | ^
main.c:6:1: error: expected declaration specifiers before 'printf'
    6 | printf("%d\n",r/r);
      | ^~~~~~
main.c:8:1: error: expected declaration specifiers before 'return'
    8 | return 0;
      | ^~~~~~
main.c:9:1: error: expected declaration specifiers before '}' token
    9 | }
      | ^
main.c:3:5: error: old-style parameter declarations in prototyped function definition
    3 | int main(void)
      |     ^~~~
main.c:10: error: expected '{' at end of input
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int r;
  cin>>r;
  cout<<r*r;
  return 0
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: expected ';' before '}' token
    7 |   return 0
      |           ^
      |           ;
    8 | }
      | ~
Language: C++

using namespace std;
int main(){
	int r;
  	cin >> r;
  	cout << r*r << endl;
  	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'cin' was not declared in this scope
    4 |         cin >> r;
      |         ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:5:9: error: 'cout' was not declared in this scope
    5 |         cout << r*r << endl;
      |         ^~~~
a.cc:5:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:5:24: error: 'endl' was not declared in this scope
    5 |         cout << r*r << endl;
      |                        ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | using namespace std;
Language: Java

package app;

import java.util.Scanner;

public class SampleA {
    public static void main(String[] args) {
    // 入力された値をすべてスキャン
    Scanner sc = new Scanner(System.in);

    // 一行目の値を得る
    String line = sc.nextLine();

    // 半径を取得
    int r = Integer.parseInt(line);

    // 出力
    System.out.println(r * r);

    // Scannerを閉じる
    sc.close();
    }
}

Compiler output:
Main.java:5: error: class SampleA is public, should be declared in a file named SampleA.java
public class SampleA {
       ^
1 error
Language: Java

    // 入力された値をすべてスキャン
    Scanner sc = new Scanner(System.in);

    // 一行目の値を得る
    String line = sc.nextLine();

    // 半径を取得
    int r = Integer.parseInt(line);

    // 出力
    System.out.println(r * r);

Compiler output:
Main.java:2: error: unnamed classes are a preview feature and are disabled by default.
    Scanner sc = new Scanner(System.in);
    ^
  (use --enable-preview to enable unnamed classes)
Main.java:11: error: class, interface, enum, or record expected
    System.out.println(r * r);
    ^
2 errors
Language: Java

public static void main(String[] args) {
  // 入力された値をすべてスキャン
  Scanner sc = new Scanner(System.in);

  // 一行目の値を得る
  String line = sc.nextLine();

  // 半径rを取得
  int r = Integer.parseInt(line);

  // r*r(答え)を出力
  System.out.println(r * r);

  // Scannerを閉じる
  sc.close();
}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String[] args) {
              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: C++

#include<string>
#include<iostream>
#include<cmath>
#define MIN 1e13
typedef long long ll;
using namespace std;

int
main(void)
{
  int n; cin >> n;
  int ans = n * n;
  cout << ans << endl;
  return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:14:12: error: expected '}' at end of input
   14 |   return 0;
      |            ^
a.cc:10:1: note: to match this '{'
   10 | {
      | ^
Language: C++

#include <iostream>
using namespace std;

int main() {
    int r;
    cin >> r;
    cout << r * r << end1
        return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: 'end1' was not declared in this scope
    7 |     cout << r * r << end1
      |                      ^~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
    int r;
    cin >> r;
    cout << r*r << end1
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:20: error: 'end1' was not declared in this scope
    7 |     cout << r*r << end1
      |                    ^~~~
Language: C++

using namespace std;

int main(){
    int r;
    cin >> r;
    cout << r*r << end1
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin >> r;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:6:5: error: 'cout' was not declared in this scope
    6 |     cout << r*r << end1
      |     ^~~~
a.cc:6:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:20: error: 'end1' was not declared in this scope
    6 |     cout << r*r << end1
      |                    ^~~~
Language: Java

import java.util.Sccaner;

class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int r = sc.nextInt();
            System.out.print(r*r);
    }
}

Compiler output:
Main.java:1: error: cannot find symbol
import java.util.Sccaner;
                ^
  symbol:   class Sccaner
  location: package java.util
Main.java:5: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class Main
3 errors
Language: C++

# include <iostream>
using nmespace std;
int main(){
  int a;
  cin >> a;
  cout << a*a;
  return 0;
}
  

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'nmespace'
    2 | using nmespace std;
      |       ^~~~~~~~
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin >> a;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 |   cout << a*a;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <iostream>
using namespcae std;

int main(void)
{
  int r;
  cin >> r;
  cout << r * r << endl;
  return 0;
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespcae'
    2 | using namespcae std;
      |       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin >> r;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout << r * r << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |   cout << r * r << endl;
      |                    ^~~~
      |                    std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
using namespace std:
int main() {
  int r;
  cin >> r;
  cout << r * r << endl;
  return 0;
}

Compiler output:
a.cc:2:20: error: expected ';' before ':' token
    2 | using namespace std:
      |                    ^
      |                    ;
a.cc:2:20: error: expected unqualified-id before ':' token
Language: C++

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include<set>
#include<map>
using namespace std;


int main() {
    int a;
    cin >> a;
    cout << r*r;
    cout << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:13: error: 'r' was not declared in this scope
   14 |     cout << r*r;
      |             ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> r;
      |     ^~~
a.cc:4:5: error: 'cout' was not declared in this scope
    4 |     cout << r * r * r << endl;
      |     ^~~~
a.cc:4:26: error: 'endl' was not declared in this scope
    4 |     cout << r * r * r << endl;
      |                          ^~~~
Language: C++

int main() {
    int r;
    cin >> r;
    cout << r *4 << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> r;
      |     ^~~
a.cc:4:5: error: 'cout' was not declared in this scope
    4 |     cout << r *4 << endl;
      |     ^~~~
a.cc:4:21: error: 'endl' was not declared in this scope
    4 |     cout << r *4 << endl;
      |                     ^~~~
Language: C++

#include <bits/stdc++.h>

using namespace;std;

int main(){
int r;
  cin>>r;
  cout<<r*r;
  return 0;

}

Compiler output:
a.cc:3:16: error: expected identifier before ';' token
    3 | using namespace;std;
      |                ^
a.cc:3:17: error: 'std' does not name a type
    3 | using namespace;std;
      |                 ^~~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>r;
      |   ^~~
      |   std::cin
In file included from /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:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout<<r*r;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
    int r;
    cin >> r;
    cout << r^2;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:14: error: no match for 'operator^' (operand types are 'std::basic_ostream<char>' and 'int')
    7 |     cout << r^2;
      |     ~~~~~~~~~^~
      |          |    |
      |          |    int
      |          std::basic_ostream<char>
a.cc:7:14: note: candidate: 'operator^(int, int)' (built-in)
    7 |     cout << r^2;
      |     ~~~~~~~~~^~
a.cc:7:14: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'int'
In file included from /usr/include/c++/14/bits/memory_resource.h:38,
                 from /usr/include/c++/14/string:68,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/cstddef:146:3: note: candidate: 'constexpr std::byte std::operator^(byte, byte)'
  146 |   operator^(byte __l, byte __r) noexcept
      |   ^~~~~~~~
/usr/include/c++/14/cstddef:146:18: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'std::byte'
  146 |   operator^(byte __l, byte __r) noexcept
      |             ~~~~~^~~
/usr/include/c++/14/bits/ios_base.h:94:3: note: candidate: 'constexpr std::_Ios_Fmtflags std::operator^(_Ios_Fmtflags, _Ios_Fmtflags)'
   94 |   operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:94:27: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'std::_Ios_Fmtflags'
   94 |   operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b) _GLIBCXX_NOTHROW
      |             ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/ios_base.h:144:3: note: candidate: 'constexpr std::_Ios_Openmode std::operator^(_Ios_Openmode, _Ios_Openmode)'
  144 |   operator^(_Ios_Openmode __a, _Ios_Openmode __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:144:27: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'std::_Ios_Openmode'
  144 |   operator^(_Ios_Openmode __a, _Ios_Openmode __b) _GLIBCXX_NOTHROW
      |             ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/ios_base.h:191:3: note: candidate: 'constexpr std::_Ios_Iostate std::operator^(_Ios_Iostate, _Ios_Iostate)'
  191 |   operator^(_Ios_Iostate __a, _Ios_Iostate __b) _GLIBCXX_NOTHROW
      |   ^~~~~~~~
/usr/include/c++/14/bits/ios_base.h:191:26: note:   no known conversion for argument 1 from 'std::basic_ostream<char>' to 'std::_Ios_Iostate'
  191 |   operator^(_Ios_Iostate __a, _Ios_Iostate __b) _GLIBCXX_NOTHROW
      |             ~~~~~~~~~~~~~^~~
Language: C++

#include<iostream>
#include<string>
#include<math>
using namespace std;

int main(){
    int r;
    cin >> r;
    cout << r^2;
    return 0;
}

Compiler output:
a.cc:3:9: fatal error: math: No such file or directory
    3 | #include<math>
      |         ^~~~~~
compilation terminated.
Language: C++

int main() {
    int r;
    cin >> r;
    cout << r*r; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> r;
      |     ^~~
a.cc:4:5: error: 'cout' was not declared in this scope
    4 |     cout << r*r;
      |     ^~~~
Language: Java

import java.util.*;
public class Main{
    public static void main(String[] args){

        Scanner sc = new Scanne(System.in);
        int r = sc.nextInt();
        System.out.println(r*r);
    }
}

Compiler output:
Main.java:5: error: cannot find symbol
        Scanner sc = new Scanne(System.in);
                         ^
  symbol:   class Scanne
  location: class Main
1 error
Language: Java

import java.util.Scanner;
class ABC145_A {
  { public　static void main(String[] args){
  Scanner r = new Scanner(System.in);
    System.out.println(r*r);
  } 
}

Compiler output:
Main.java:3: error: illegal start of expression
  { public?static void main(String[] args){
    ^
Main.java:3: error: illegal character: '\u3000'
  { public?static void main(String[] args){
          ^
2 errors
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){int a;cin>>a;cout<<r*r;return 0;}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:31: error: 'r' was not declared in this scope
    3 | int main(){int a;cin>>a;cout<<r*r;return 0;}
      |                               ^
Language: C++

#include<iostream>

using namespace std;

void Main() {
	int r;
 
	cin >> r;
 
	cout << r * r;
}

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

     
    using namespace std;
     
    #define ll long long
    #define endl '\n'
    #define pb push_back
    #define loop(i, a, b) for (int i = a; i < b; i++)
     
    const ll mod = 1e9+7;
     
    ll expo_mod(ll x, ll n) //Exponenciação rápida com módulo
    {
        if (n == 1)
            return x%mod;
        ll t = expo_mod(x, n/2); //O resultado já é em módulo
        ll resul = ((t%mod) * (t%mod))%mod;
        if (n%2 == 1) //Se n é ímpar
            resul = ((resul%mod)*x%mod)%mod;
        return resul;
    }
     
    ll f(ll x){
      ll res = 1;
      for(int i = 2; i<=x; ++i) res = ((res%mod)*(i%mod))%mod;
      return res;
    }
     
    ll modulo(ll x)
    {
        ll r = x%mod;
        if (r < 0)
            r += mod;
        return r;
    }
     
    int main ()
    {
     
        ll x, y; cin >> x >> y;
     
        if ((x+y)%3 != 0 && 2*x-y<0 && 2*y-x < 0)
        { //Não há solução
            cout << 0 << endl;
            return 0;
        }
     
     
        ll n = (x+y)/3;
     
        ll a = (2 * y - x)/3;
        ll b = (2 * x - y)/3;
     
        ll result = modulo( f(n) * expo_mod(f(n - a), mod - 2) * expo_mod(f(a), mod - 2));
     
        cout << result << endl;
     
        return 0;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:39:18: error: 'cin' was not declared in this scope
   39 |         ll x, y; cin >> x >> y;
      |                  ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | 
a.cc:43:13: error: 'cout' was not declared in this scope
   43 |             cout << 0 << endl;
      |             ^~~~
a.cc:43:13: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:55:9: error: 'cout' was not declared in this scope
   55 |         cout << result << endl;
      |         ^~~~
a.cc:55:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

int main(void)
{
  int r;
  scanf("%d"&r);
  printf("%d"r*r);
  return 0
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:13: error: invalid operands of types 'const char [3]' and 'int' to binary 'operator&'
    4 |   scanf("%d"&r);
      |         ~~~~^~
      |         |    |
      |         |    int
      |         const char [3]
a.cc:4:3: error: 'scanf' was not declared in this scope
    4 |   scanf("%d"&r);
      |   ^~~~~
a.cc:5:10: error: unable to find string literal operator 'operator""r' with 'const char [3]', 'long unsigned int' arguments
    5 |   printf("%d"r*r);
      |          ^~~~~
a.cc:5:3: error: 'printf' was not declared in this scope
    5 |   printf("%d"r*r);
      |   ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(void)
a.cc:6:11: error: expected ';' before '}' token
    6 |   return 0
      |           ^
      |           ;
    7 | }
      | ~
Language: C++

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

int main() {
  int r;
  cin r;
  cout << r*r << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:6: error: expected ';' before 'r'
    6 |   cin r;
      |      ^~
      |      ;
Language: Java

package Programdornovato7.java;

import java.util.Scanner;

public class Programdornovato7 {

    public static void main(String[] args) {
Scanner sc1=new Scanner(System.in);

int a=sc1.nextInt();
if(a>=1&&a<=100){
        System.out.println(a*a);}

    }
    
}

Compiler output:
Main.java:5: error: class Programdornovato7 is public, should be declared in a file named Programdornovato7.java
public class Programdornovato7 {
       ^
1 error
Language: Java

package miniexamenes;

import java.util.Scanner;

public class Programdornovato7 {

    public static void main(String[] args) {
Scanner sc1=new Scanner(System.in);

int a=sc1.nextInt();
if(a>=1&&a<=100){
        System.out.println(a*a);}

    }
    
}

Compiler output:
Main.java:5: error: class Programdornovato7 is public, should be declared in a file named Programdornovato7.java
public class Programdornovato7 {
       ^
1 error
Language: C++

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

int main() {
  int a;
  ll s;
  cin >>a;
  ll s =a*a;
  cout <<s<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:6: error: redeclaration of 'll s'
   12 |   ll s =a*a;
      |      ^
a.cc:10:6: note: 'll s' previously declared here
   10 |   ll s;
      |      ^
Language: C++

#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;
const int INF = 1e9;

int main() {
  int n, ans;
  cin >> n;
  ans = n * n;
  cout << ans << endl;
  return 0;
}
#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;
const int INF = 1e9;

int main() {
  int n, ans;
  cin >> n;
  ans = n * n;
  cout << ans << endl;
  return 0;
}


Compiler output:
a.cc:20:11: error: redefinition of 'const int INF'
   20 | const int INF = 1e9;
      |           ^~~
a.cc:6:11: note: 'const int INF' previously defined here
    6 | const int INF = 1e9;
      |           ^~~
a.cc:22:5: error: redefinition of 'int main()'
   22 | int main() {
      |     ^~~~
a.cc:8:5: note: 'int main()' previously defined here
    8 | int main() {
      |     ^~~~
Language: C++

#include<stdio.h>
int main(void)
{
  int r;
  scanf("%d"&r);
  printf("%d",r*r);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: invalid operands of types 'const char [3]' and 'int' to binary 'operator&'
    5 |   scanf("%d"&r);
      |         ~~~~^~
      |         |    |
      |         |    int
      |         const char [3]
Language: C++

#include<bits/stdc++.h>
 using namespace std;
 int main()
{
  int r; 
 double pi= 3.14159;
  cin>>r>>pi;
 pi=(r*r)/(1*1);
 cout<<value<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: 'value' was not declared in this scope
    9 |  cout<<value<<endl;
      |        ^~~~~
Language: C++

#include<bits/stdc++.h>
 using namespace std;
 int main()
{
  int r; 
 double pi= 3.14159;
  cin>>r>>pi;
 double area=pi*(r*r)/(1*1);
 cout<<value<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: 'value' was not declared in this scope
    9 |  cout<<value<<endl;
      |        ^~~~~
Language: C

#include<stdio.h>
#define pi 3.14159
int main()
{
  int r;
  scanf("%d",&r);
  double area = pi*(r*r);
 int value=ceil(area/pi);
 printf("%d"\n",value);   
 return 0; 
}

Compiler output:
main.c: In function 'main':
main.c:8:12: error: implicit declaration of function 'ceil' [-Wimplicit-function-declaration]
    8 |  int value=ceil(area/pi);
      |            ^~~~
main.c:2:1: note: include '<math.h>' or provide a declaration of 'ceil'
    1 | #include<stdio.h>
  +++ |+#include <math.h>
    2 | #define pi 3.14159
main.c:8:12: warning: incompatible implicit declaration of built-in function 'ceil' [-Wbuiltin-declaration-mismatch]
    8 |  int value=ceil(area/pi);
      |            ^~~~
main.c:8:12: note: include '<math.h>' or provide a declaration of 'ceil'
main.c:9:13: error: stray '\' in program
    9 |  printf("%d"\n",value);
      |             ^
main.c:9:13: error: expected ')' before 'n'
    9 |  printf("%d"\n",value);
      |        ~    ^~
      |             )
main.c:9:15: warning: missing terminating " character
    9 |  printf("%d"\n",value);
      |               ^
main.c:9:15: error: missing terminating " character
    9 |  printf("%d"\n",value);
      |               ^~~~~~~~~   
main.c:10:11: error: expected ';' before '}' token
   10 |  return 0;
      |           ^
      |           ;
   11 | }
      | ~
Language: C++

#include<iostream>
using namespace std;
int main()
    int r,s;
    cin>>r;
    s=r*r;
    cout<<s<<endl;
   
}


Compiler output:
a.cc:4:5: error: expected initializer before 'int'
    4 |     int r,s;
      |     ^~~
a.cc:5:5: error: 'cin' does not name a type
    5 |     cin>>r;
      |     ^~~
a.cc:6:5: error: 's' does not name a type
    6 |     s=r*r;
      |     ^
a.cc:7:5: error: 'cout' does not name a type
    7 |     cout<<s<<endl;
      |     ^~~~
a.cc:9:1: error: expected declaration before '}' token
    9 | }
      | ^
Language: C++

#include<iostream>
using namespace std;
int main()
    int r;
    cin>>r;
    cout<<r*r<<endl;
    return 0;
}


Compiler output:
a.cc:4:5: error: expected initializer before 'int'
    4 |     int r;
      |     ^~~
a.cc:5:5: error: 'cin' does not name a type
    5 |     cin>>r;
      |     ^~~
a.cc:6:5: error: 'cout' does not name a type
    6 |     cout<<r*r<<endl;
      |     ^~~~
a.cc:7:5: error: expected unqualified-id before 'return'
    7 |     return 0;
      |     ^~~~~~
a.cc:8:1: error: expected declaration before '}' token
    8 | }
      | ^
Language: C++

#include<stdio.h>
int main()
{
    int r,area;
    cin>>r;
    area=(r*r)/(1*1);
    cout<<area<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'cin' was not declared in this scope
    5 |     cin>>r;
      |     ^~~
a.cc:7:5: error: 'cout' was not declared in this scope
    7 |     cout<<area<<endl;
      |     ^~~~
a.cc:7:17: error: 'endl' was not declared in this scope
    7 |     cout<<area<<endl;
      |                 ^~~~
Language: C++

<?php
  
  list($r) = explode(" ", trim(fgets(STDIN)));

  echo $r*$r;

Compiler output:
a.cc:1:1: error: expected unqualified-id before '<' token
    1 | <?php
      | ^
a.cc:5:3: error: 'echo' does not name a type
    5 |   echo $r*$r;
      |   ^~~~
Language: Java

package aaaa;
 
import java.util.Scanner;
 
public class E {
	  public static void main(String[] args) {
		    Scanner sc = new Scanner(System.in);
		    int N = sc.nextInt();
		    int x[] = new int[N];
		    int y[] = new int[N];
		    
		    for (int i = 0; i < N; i++) {
		      x[N] = sc.nextInt();
		      y[N] = sc.nextInt();
		    }
        	double sum = 0.0;
 			for(int i = 0; i < N; i++){
      			for(int j = i + 1; j < N; j++){
            	  sum += Math.sqrt((x[j] - x[i]) * (x[j] - x[i]) + (y[j] - y[i]) * (y[j] - y[i]));
                }
            }
	        System.out.print(sum * 2/ n);
	  }
}

Compiler output:
Main.java:5: error: class E is public, should be declared in a file named E.java
public class E {
       ^
Main.java:22: error: cannot find symbol
	        System.out.print(sum * 2/ n);
	                                  ^
  symbol:   variable n
  location: class E
2 errors
Language: Java

public static void main(String[] args){

int r  = 100;
int Circle = r*r*3.14;
System.out.print(Circle+"倍です");
}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
public static void main(String[] args){
              ^
  (use --enable-preview to enable unnamed classes)
1 error