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

using System;
public class Program {
	public static void Main() {
		for(int i = 1; i <= 9; i++) {
			for(int j = 1; j <= 9; j++) {
				Console.WriteLine(i + "x" + j + "=" + (i * j));
			}
		}
	}
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:2:1: error: expected unqualified-id before 'public'
    2 | public class Program {
      | ^~~~~~
Language: C++

#include<iostream>
const int X99 9
const int Y99 9
int main()
{
for(int x=1;x<=X99;x++){
 for(int y=1;y<=Y99;y++){
   cout << x << 'x' << y << '='<< x*y << '\n';
  }
 }
}

Compiler output:
a.cc:2:15: error: expected initializer before numeric constant
    2 | const int X99 9
      |               ^
Language: C++

#include<iostream>
const int X99 9
const int Y99 9
int main()
{
for(int x=1;x<=X99;x++){
??for(int y=1;y<=Y99;y++){
??????std::cout << x << 'x' << y << '='<< x*y << '\n';
????}
??}
return 0;
}

Compiler output:
a.cc:2:15: error: expected initializer before numeric constant
    2 | const int X99 9
      |               ^
Language: C++

#include<iostream>
const int X99 9
const int Y99 9
int main()
{
for(int x=1;x<=X99;x++){
for(int y=1;y<=Y99;y++){
std::cout << x << 'x' << y << '='<< x*y << '\n';
}
}
return 0;
}

Compiler output:
a.cc:2:15: error: expected initializer before numeric constant
    2 | const int X99 9
      |               ^
Language: C++

#include <iostream>

int main(){
for(int i = 1; i < 10; i++){
for(int j = 1; j < 10; j++){
cout << i << "x" << j << "=" << i*j << endl;
}
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    6 | cout << i << "x" << j << "=" << i*j << endl;
      | ^~~~
      | std::cout
In file included from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:6:40: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    6 | cout << i << "x" << j << "=" << i*j << 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(){

for(i=1;i<9;i++){
  for(j=1;j<9;j++){
    cout << i << "x" << j << "=" << i*j << endl; 
  }
}



    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:5: error: 'i' was not declared in this scope
    6 | for(i=1;i<9;i++){
      |     ^
a.cc:7:7: error: 'j' was not declared in this scope
    7 |   for(j=1;j<9;j++){
      |       ^
Language: C++

#include <iostream>
using namespace std;

int main()
{
    int multiplier,multiplicand;

    for( multiplicand = 1; multiplicand < 10 ; multiplicand++)
    {
       for(multiplier = 1; multiplier < 10 ; multiplier++)
           cout << multiplicand << "x" << multiplier << "=" multiplicand * multiplier << endl;
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:60: error: expected ';' before 'multiplicand'
   11 |            cout << multiplicand << "x" << multiplier << "=" multiplicand * multiplier << endl;
      |                                                            ^~~~~~~~~~~~~
      |                                                            ;
Language: C++

int main(){
    int a,b;
    for(a=1;a<=9;a++)
        for(b=1;b<=9;b++)
            printf("%dx%d=%d\n",a,b,a*b);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: 'printf' was not declared in this scope
    5 |             printf("%dx%d=%d\n",a,b,a*b);
      |             ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(){
Language: C++

class Main{
    public static void main(String[] a){
    
    int[] x = new int[9];
    int x[] = {1,2,3,4,5,6,7,8,9};
    int[] y = new int[9];
    int y[] = {1,2,3,4,5,6,7,8,9};
     for(int i=0;i<10;i++){
     for(int j=0;j<10;j++){
       System.out.println{x[i]+"x"+y[j]+"="+x[i]*y[j]};
     }
    }
   }
  }

Compiler output:
a.cc:2:11: error: expected ':' before 'static'
    2 |     public static void main(String[] a){
      |           ^~~~~~~
      |           :
a.cc:2:29: error: 'String' has not been declared
    2 |     public static void main(String[] a){
      |                             ^~~~~~
a.cc:2:38: error: expected ',' or '...' before 'a'
    2 |     public static void main(String[] a){
      |                                      ^
a.cc:14:4: error: expected ';' after class definition
   14 |   }
      |    ^
      |    ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:4:8: error: structured binding declaration cannot have type 'int'
    4 |     int[] x = new int[9];
      |        ^~
a.cc:4:8: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:4:8: error: empty structured binding declaration
a.cc:4:11: error: expected initializer before 'x'
    4 |     int[] x = new int[9];
      |           ^
a.cc:6:8: error: structured binding declaration cannot have type 'int'
    6 |     int[] y = new int[9];
      |        ^~
a.cc:6:8: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:6:8: error: empty structured binding declaration
a.cc:6:11: error: expected initializer before 'y'
    6 |     int[] y = new int[9];
      |           ^
a.cc:10:8: error: 'System' was not declared in this scope
   10 |        System.out.println{x[i]+"x"+y[j]+"="+x[i]*y[j]};
      |        ^~~~~~
Language: C++

package volume0;

public class Main{
	public static void main(String[] args) {
		for(int i=1;i<10;i++){
			for(int j=1; j<10;j++){
				System.out.println(i+"x"+j+"="+i*j);
			}
		}
	}

}

Compiler output:
a.cc:1:1: error: 'package' does not name a type
    1 | package volume0;
      | ^~~~~~~
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main{
      | ^~~~~~
Language: C++

public class Main{
	public static void main(String[] args) {
		for(int i=1;i<10;i++){
			for(int j=1; j<10;j++){
				System.out.println(i+"x"+j+"="+i*j);
			}
		}
	}

}

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

using System;

namespace mul
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int cntX = 1; cntX < 10; cntX++)
            {
                for (int cntY = 1; cntY < 10; cntY++)
                    Console.WriteLine("{0}x{1}={2}", cntX, cntY, cntX * cntY);
            }
        }
    }
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:7:26: error: 'string' has not been declared
    7 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:7:35: error: expected ',' or '...' before 'args'
    7 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:15:6: error: expected ';' after class definition
   15 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void mul::Program::Main(int*)':
a.cc:12:21: error: 'Console' was not declared in this scope
   12 |                     Console.WriteLine("{0}x{1}={2}", cntX, cntY, cntX * cntY);
      |                     ^~~~~~~
Language: C++

namespace mul
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int cntX = 1; cntX < 10; cntX++)
            {
                for (int cntY = 1; cntY < 10; cntY++)
                    System.Console.WriteLine("{0}x{1}={2}", cntX, cntY, cntX * cntY);
            }
        }
    }
}

Compiler output:
a.cc:5:26: error: 'string' has not been declared
    5 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:5:35: error: expected ',' or '...' before 'args'
    5 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:13:6: error: expected ';' after class definition
   13 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void mul::Program::Main(int*)':
a.cc:10:21: error: 'System' was not declared in this scope
   10 |                     System.Console.WriteLine("{0}x{1}={2}", cntX, cntY, cntX * cntY);
      |                     ^~~~~~
Language: C++

#incldue <stdio.h>

int main(void)
{
    int i, j;
    for (i = 1; i <= 9; i++){
        for (j = 1; j <= 9; j++) printf("%dx%d=%d\n", i, j, i * j);
    }
    return(0);
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue <stdio.h>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:7:34: error: 'printf' was not declared in this scope
    7 |         for (j = 1; j <= 9; j++) printf("%dx%d=%d\n", i, j, i * j);
      |                                  ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | #incldue <stdio.h>
Language: C++

#include <iostream>
#include <assert.h>
#include <list>
#include <vector>
#include <cmath>

void ff( std::list< std::vector< std::string > > & c )
{
    // ??¢???
    std::for_each( c.begin(), c.end(),
        []( std::vector< std::string> & elem )
        { }
    ) ;

    // ?°????
    std::for_each( c.begin(), c.end(),
        []( auto & elem )
        {  }
    ) ;
}

template < typename Printer >
void f( Printer && p )
{
    p( 123 ) ;
    p( 1.23 ) ;
    p( "123" ) ;
}


void operator delete( void *, std::size_t ) noexcept ;
void operator delete[]( void *, std::size_t ) noexcept ;

template < typename T >
constexpr T sqrt( T s )
{
    T x = s / 2.0 ; // ??????????????????
    T prev = 0.0 ;

    while ( x != prev )
    { // ???????????????????????????????????§????????????2?????°?????????
        prev = x ;
        x = (x + s / x ) / 2.0 ; // ????????????2
    }
    return x ;
}


// 1927426???1927428???WA???????????????????????????????????§???
auto dodo() {

  assert(std::abs(sqrt(2.0) - std::sqrt(2)) < 1e-9);

    f( []( auto && elem ){ assert(1 && elem) ; } ) ;
  auto x = 0b101;
  assert(x == 5);
  auto k = 1.2'3'4'5'6'789;
  assert(![ x = 0 ](){ return x ; }()) ;

  auto f = []( auto x ) { return x ; } ;

  f( 0 ) ;
  f( 0.0 ) ;
  f( 'A' ) ;
  f( "hello" ) ;

  int i = 10;
  decltype(auto) a = i ;



  assert(1.23456789==k);
  for(auto i=0; i<9; i++)
    for(auto j=0; j<9; j++)
      std::cout << i+1 << 'x' << j+1 << '=' << (i+1)*(j+1) << std::endl;
}

int main() {
  dodo();
  return 0;
}

Compiler output:
a.cc: In function 'void ff(std::__cxx11::list<std::vector<std::__cxx11::basic_string<char> > >&)':
a.cc:10:10: error: 'for_each' is not a member of 'std'
   10 |     std::for_each( c.begin(), c.end(),
      |          ^~~~~~~~
a.cc:16:10: error: 'for_each' is not a member of 'std'
   16 |     std::for_each( c.begin(), c.end(),
      |          ^~~~~~~~
Language: C++

#include<iostream>
using namespace std;

int main(){

for (int i =1; i < 10; i++){
 for (int i2 = 1; i2 < 10; i2++{
  
 cout << i << "x" << i2 << "=" << i * i2;
 }
}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:32: error: expected ')' before '{' token
    7 |  for (int i2 = 1; i2 < 10; i2++{
      |      ~                         ^
      |                                )
Language: C++

using System;

class AOJ{
  static void Main(string[] args)
  {
    for(int i=1; i<=9; i++){
      for(int j=1; j<=9; j++)
        Console.WriteLine(i+"x"+j+"="+i*j);
    }
  }
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:4:20: error: 'string' has not been declared
    4 |   static void Main(string[] args)
      |                    ^~~~~~
a.cc:4:29: error: expected ',' or '...' before 'args'
    4 |   static void Main(string[] args)
      |                             ^~~~
a.cc:11:2: error: expected ';' after class definition
   11 | }
      |  ^
      |  ;
a.cc: In static member function 'static void AOJ::Main(int*)':
a.cc:8:9: error: 'Console' was not declared in this scope
    8 |         Console.WriteLine(i+"x"+j+"="+i*j);
      |         ^~~~~~~
a.cc:8:34: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    8 |         Console.WriteLine(i+"x"+j+"="+i*j);
      |                           ~~~~~~~^~~~
      |                                |  |
      |                                |  const char [2]
      |                                const char*
Language: C++

for i in 1...9for j in 1...9 print i,"x",j,"=",i*j,"\n"

Compiler output:
a.cc:1:10: error: too many decimal points in number
    1 | for i in 1...9for j in 1...9 print i,"x",j,"=",i*j,"\n"
      |          ^~~~~~~~
a.cc:1:24: error: too many decimal points in number
    1 | for i in 1...9for j in 1...9 print i,"x",j,"=",i*j,"\n"
      |                        ^~~~~
a.cc:1:1: error: expected unqualified-id before 'for'
    1 | for i in 1...9for j in 1...9 print i,"x",j,"=",i*j,"\n"
      | ^~~
Language: C++

for i in 1..9for j in 1..9 print i,"x",j,"=",i*j,"\n"end end

Compiler output:
a.cc:1:10: error: too many decimal points in number
    1 | for i in 1..9for j in 1..9 print i,"x",j,"=",i*j,"\n"end end
      |          ^~~~~~~
a.cc:1:23: error: too many decimal points in number
    1 | for i in 1..9for j in 1..9 print i,"x",j,"=",i*j,"\n"end end
      |                       ^~~~
a.cc:1:1: error: expected unqualified-id before 'for'
    1 | for i in 1..9for j in 1..9 print i,"x",j,"=",i*j,"\n"end end
      | ^~~
Language: C++

using System;

class Program
{
  static void Main()
  { 
    int i, j;
    for (i = 1; i < 10; i++){
      for (j = 1; j < 10; j++){
        Console.WriteLine(i+"x"+j+"="+i*j);  
      }
    }
  }
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:14:2: error: expected ';' after class definition
   14 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Program::Main()':
a.cc:10:9: error: 'Console' was not declared in this scope
   10 |         Console.WriteLine(i+"x"+j+"="+i*j);
      |         ^~~~~~~
a.cc:10:34: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
   10 |         Console.WriteLine(i+"x"+j+"="+i*j);
      |                           ~~~~~~~^~~~
      |                                |  |
      |                                |  const char [2]
      |                                const char*
Language: C++

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

int main(void)
{
    int i, j;

    for (i = 1; i <= 9; i++; ) {
        for (j = 1; j <=9; j++) {
            printf("%dx%d=%d\n", i, j, i*j);
        }
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:28: error: expected ')' before ';' token
    9 |     for (i = 1; i <= 9; i++; ) {
      |         ~                  ^
      |                            )
a.cc:9:30: error: expected primary-expression before ')' token
    9 |     for (i = 1; i <= 9; i++; ) {
      |                              ^
Language: C++

#include<stdio.h>
int main(void)
{
	int i,j;
	for(i=1;i<=9;i++){
		for(j=1;j<=9;j++){
			print("%dx%d=%d",i,j,i*j);
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:25: error: 'print' was not declared in this scope; did you mean 'printf'?
    7 |                         print("%dx%d=%d",i,j,i*j);
      |                         ^~~~~
      |                         printf
Language: C++

include<stdio.h>
int main(){
  int i,j;
  for(i=1;i<=9;i++){
    for(j=1;j<=9;j++){
      printf("%d×%d=%d\n",i,j,i*j);
    }
  }
  return 0;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<stdio.h>
      | ^~~~~~~
Language: C++

using System;

namespace _0000_QQ {

	public static class Program {

		public static void Main() {
			for (int i = 1; i <= 9; i++) {
				for (int j = 1; j <= 9; j++) {
					Console.WriteLine("{0}x{1}={2}", i, j, i * j);
				}
			}
		}

	}

}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:5:9: error: expected unqualified-id before 'public'
    5 |         public static class Program {
      |         ^~~~~~
Language: C++

class Main{
    public static void main(String[] a){
int d;
for(int x = 0,x < 10,x++){
for(int y = 0,y < 10,y++){
d = x * y;
System.out.print(x + "x" + y = d);
            }
        }

    }
}

Compiler output:
a.cc:2:11: error: expected ':' before 'static'
    2 |     public static void main(String[] a){
      |           ^~~~~~~
      |           :
a.cc:2:29: error: 'String' has not been declared
    2 |     public static void main(String[] a){
      |                             ^~~~~~
a.cc:2:38: error: expected ',' or '...' before 'a'
    2 |     public static void main(String[] a){
      |                                      ^
a.cc:12:2: error: expected ';' after class definition
   12 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:4:17: error: expected ';' before '<' token
    4 | for(int x = 0,x < 10,x++){
      |                 ^
a.cc:4:17: error: expected primary-expression before '<' token
a.cc:4:25: error: expected ';' before ')' token
    4 | for(int x = 0,x < 10,x++){
      |                         ^
a.cc:5:17: error: expected ';' before '<' token
    5 | for(int y = 0,y < 10,y++){
      |                 ^
a.cc:5:17: error: expected primary-expression before '<' token
a.cc:5:25: error: expected ';' before ')' token
    5 | for(int y = 0,y < 10,y++){
      |                         ^
a.cc:7:1: error: 'System' was not declared in this scope
    7 | System.out.print(x + "x" + y = d);
      | ^~~~~~
a.cc:7:26: error: lvalue required as left operand of assignment
    7 | System.out.print(x + "x" + y = d);
      |                  ~~~~~~~~^~~
Language: C++

class Main{
    public static void main(String[] a){
        for(int i=1;i<=9;i++){
             for(int j=1;j<=9;j++){
    		System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
    	     }
    	}
    }
}

Compiler output:
a.cc:5:63: error: stray '\' in program
    5 |                 System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
      |                                                               ^
a.cc:5:64: error: stray '\' in program
    5 |                 System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
      |                                                                ^
a.cc:2:11: error: expected ':' before 'static'
    2 |     public static void main(String[] a){
      |           ^~~~~~~
      |           :
a.cc:2:29: error: 'String' has not been declared
    2 |     public static void main(String[] a){
      |                             ^~~~~~
a.cc:2:38: error: expected ',' or '...' before 'a'
    2 |     public static void main(String[] a){
      |                                      ^
a.cc:9:2: error: expected ';' after class definition
    9 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:5:17: error: 'System' was not declared in this scope
    5 |                 System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
      |                 ^~~~~~
a.cc:5:48: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    5 |                 System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
      |                                    ~~~~~~~~~~~ ^ ~~~
      |                                            |     |
      |                                            |     const char [2]
      |                                            const char*
a.cc:5:65: error: 'n' was not declared in this scope
    5 |                 System.out.println(i + "x" + j + "=" + (i*j)+ \\n);
      |                                                                 ^
Language: C++

#include<iostream>
using namespace std;

int main(){
		for(i = 1; i < 10; i++)
			for(j = 1; j < 10; i++)
    		cout << i "x" j "=" i*j << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:21: error: 'i' was not declared in this scope
    5 |                 for(i = 1; i < 10; i++)
      |                     ^
a.cc:6:29: error: 'j' was not declared in this scope
    6 |                         for(j = 1; j < 10; i++)
      |                             ^
Language: C++

#include<iostream>
using namespace std;

int main(){
		int i;
		int j;
		for(i = 1; i < 10; i++){
			for(j = 1; j < 10; i++){
    		cout << i "x" j "=" i*j << endl;
			}
		}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: expected ';' before string constant
    9 |                 cout << i "x" j "=" i*j << endl;
      |                          ^~~~
      |                          ;
Language: C++

#include<iostream>
using namespace std;

int main(){
		QQ(9,9);
    return 0;
}

void QQ(int i,int j){
	if(1 <= i){ QQ(i - 1, j)};
	if(1 <= j){ QQ(i, j - 1);
	cout << i << "x" << j << "=" << i*j << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:17: error: 'QQ' was not declared in this scope
    5 |                 QQ(9,9);
      |                 ^~
a.cc: In function 'void QQ(int, int)':
a.cc:10:33: error: expected ';' before '}' token
   10 |         if(1 <= i){ QQ(i - 1, j)};
      |                                 ^
      |                                 ;
a.cc:13:2: error: expected '}' at end of input
   13 | }
      |  ^
a.cc:9:21: note: to match this '{'
    9 | void QQ(int i,int j){
      |                     ^
Language: C++

#include<iostream>
using namespace std;

void QQ(int i,int j){
	if(1 <= i){ QQ(i - 1, j)};
	if(1 <= j){ QQ(i, j - 1)};
	cout << i << "x" << j << "=" << i*j << endl;
}

int main(){
    QQ(9,9);
    return 0;
}

Compiler output:
a.cc: In function 'void QQ(int, int)':
a.cc:5:33: error: expected ';' before '}' token
    5 |         if(1 <= i){ QQ(i - 1, j)};
      |                                 ^
      |                                 ;
a.cc:6:33: error: expected ';' before '}' token
    6 |         if(1 <= j){ QQ(i, j - 1)};
      |                                 ^
      |                                 ;
Language: C++

#include<iostream>
using namespace std;

int main(){
??????int i, j;
    for(i = 1; i <=9; i++){
        for(j = 1; j <=9; j++){
            cout << i << "x" << j << "=" << i*j << endl;
        }
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      | ^
a.cc:5:2: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      |  ^
a.cc:5:3: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      |   ^
a.cc:5:4: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      |    ^
a.cc:5:5: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      |     ^
a.cc:5:6: error: expected primary-expression before '?' token
    5 | ??????int i, j;
      |      ^
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:5:7: error: expected ':' before 'int'
    5 | ??????int i, j;
      |       ^~~
      |       :
a.cc:5:7: error: expected primary-expression before 'int'
    5 | ??????int i, j;
      |       ^~~
a.cc:6:9: error: 'i' was not declared in this scope
    6 |     for(i = 1; i <=9; i++){
      |         ^
a.cc:7:13: error: 'j' was not declared in this scope
    7 |         for(j = 1; j <=9; j++){
      |             ^
Language: C++

#include <stdio.h>

int main(void)
{
	int i,j;

	for(i=1;i<=9;i++)
	{
		for(j=1;j<=9;j++)
		{
			printf("%d ",ixj);
		}

		printf("\n");
	}

 	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:38: error: 'ixj' was not declared in this scope
   11 |                         printf("%d ",ixj);
      |                                      ^~~
Language: C++

#include <stdio.h>

int main(void)
{
	int i,j;

	for(i=1;i<=9;i++)
	{
		for(j=1;j<=9;j++)
		{
			printf("%d ",i???j);
		}

		printf("\n");
	}

 	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:40: error: expected primary-expression before '?' token
   11 |                         printf("%d ",i???j);
      |                                        ^
a.cc:11:41: error: expected primary-expression before '?' token
   11 |                         printf("%d ",i???j);
      |                                         ^
a.cc:11:43: error: expected ':' before ')' token
   11 |                         printf("%d ",i???j);
      |                                           ^
      |                                           :
a.cc:11:43: error: expected primary-expression before ')' token
a.cc:11:43: error: expected ':' before ')' token
   11 |                         printf("%d ",i???j);
      |                                           ^
      |                                           :
a.cc:11:43: error: expected primary-expression before ')' token
a.cc:11:43: error: expected ':' before ')' token
   11 |                         printf("%d ",i???j);
      |                                           ^
      |                                           :
a.cc:11:43: error: expected primary-expression before ')' token
Language: C++

#include<iostream>


int main(){
for(int j=1;j<10;j++){
for(int i=1;i<10;i++){
cout<<j<<"x"<<i<<"="<<i*j<<endl;
}
}
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 | cout<<j<<"x"<<i<<"="<<i*j<<endl;
      | ^~~~
      | std::cout
In file included from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:28: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 | cout<<j<<"x"<<i<<"="<<i*j<<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 <stdio.h>
int main(void) {
	int a, b;
	for(a=1;a<10;a++){
	for (b=1;b<10;b++) {
	c= a * b;
	printf("%dx%d=%d\n", a, b, c);
	}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'c' was not declared in this scope
    6 |         c= a * b;
      |         ^
Language: C++

#include<stdio.h>
int main(void){
	int a,b,c;
	for(a=1;a>10;a++){
	 for(b=1;b>10;a++){
	 c=a*b;
	printf("%dx%d=%d\n",a,b,c);
    {
 }
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:2: error: expected '}' at end of input
   11 | }
      |  ^
a.cc:4:26: note: to match this '{'
    4 |         for(a=1;a>10;a++){
      |                          ^
a.cc:11:2: error: expected '}' at end of input
   11 | }
      |  ^
a.cc:2:15: note: to match this '{'
    2 | int main(void){
      |               ^
Language: C++

#include <stdio.h>

int main(void)
{
int i,j;
for(i=1;i<=9;i++)
for(j=1;j<=9;j++)
printf("%dx%d=%d\n",i,j,i*j)

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:29: error: expected ';' before 'return'
    8 | printf("%dx%d=%d\n",i,j,i*j)
      |                             ^
      |                             ;
    9 | 
   10 | return 0;
      | ~~~~~~
Language: C++

using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;

class Program
{
    static void Main()
    {
        for(int i = 1; i < 10 ; ++i)
        {
            for(int j = 1; j < 10 ; ++j)
            {
                Console.WriteLine("{0}x{1}={2}",i,j,i*j);
            }
        }
    }
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:19:2: error: expected ';' after class definition
   19 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Program::Main()':
a.cc:15:17: error: 'Console' was not declared in this scope
   15 |                 Console.WriteLine("{0}x{1}={2}",i,j,i*j);
      |                 ^~~~~~~
Language: C++

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static void Main()
    {
        for(int i = 1; i < 10 ; ++i)
        {
            for(int j = 1; j < 10 ; ++j)
            {
                Console.WriteLine("{0}x{1}={2}",i,j,i*j);
            }
        }
    }
}

Compiler output:
a.cc:1:7: error: expected nested-name-specifier before 'System'
    1 | using System;
      |       ^~~~~~
a.cc:2:7: error: expected nested-name-specifier before 'System'
    2 | using System.Collections.Generic;
      |       ^~~~~~
a.cc:3:7: error: expected nested-name-specifier before 'System'
    3 | using System.Linq;
      |       ^~~~~~
a.cc:4:7: error: expected nested-name-specifier before 'System'
    4 | using System.Text;
      |       ^~~~~~
a.cc:5:7: error: expected nested-name-specifier before 'System'
    5 | using System.Threading.Tasks;
      |       ^~~~~~
a.cc:19:2: error: expected ';' after class definition
   19 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Program::Main()':
a.cc:15:17: error: 'Console' was not declared in this scope
   15 |                 Console.WriteLine("{0}x{1}={2}",i,j,i*j);
      |                 ^~~~~~~
Language: C++

#include<iostream>

int main(){

    int i,j;
    for(i=0;i<9;i++)
        for(j=0;j<9;j++)
            cout<<(i+1)<<"??"<<(j+1)<<"="<<(i+1)*(j+1)<<endl;


    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |             cout<<(i+1)<<"??"<<(j+1)<<"="<<(i+1)*(j+1)<<endl;
      |             ^~~~
      |             std::cout
In file included from a.cc:1:
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:8:57: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |             cout<<(i+1)<<"??"<<(j+1)<<"="<<(i+1)*(j+1)<<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>

int main(){

    int i,j;
    for(i=0;i<9;i++)
        for(j=0;j<9;j++)
            std::cout<<(i+1)<<"??"<<(j+1)<<"="<<(i+1)*(j+1)<<endl;


    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:62: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    8 |             std::cout<<(i+1)<<"??"<<(j+1)<<"="<<(i+1)*(j+1)<<endl;
      |                                                              ^~~~
      |                                                              std::endl
In file included from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/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 m1, m2;
        m1 = 1;
        m2 = 1;
        for (m1; m1 < 10; m1++) {
                for (m2; m2 < 10; m2++) {
                        cout << m1 << "x" << m2 << "=" << m1*m2 << endl;
                }
m2 = 1
        }
        return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:7: error: expected ';' before '}' token
   12 | m2 = 1
      |       ^
      |       ;
   13 |         }
      |         ~
Language: C++

#include?? <cstdio>
int main()
{
for(int i=1;i<=9;i++)
for(int j=1;j<=9;j++)
printf("%dx%d=%d\n",i,j,i*j);
}

Compiler output:
a.cc:1:9: error: #include expects "FILENAME" or <FILENAME>
    1 | #include?? <cstdio>
      |         ^
a.cc: In function 'int main()':
a.cc:6:1: error: 'printf' was not declared in this scope
    6 | printf("%dx%d=%d\n",i,j,i*j);
      | ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | #include?? <cstdio>
Language: C++

#include<iostream>
using namespace std;
??
int main()
{
????????for(int i = 1 ; i <= 9 ; i++){
????????????????for(int j = 1 ; j <= 9 ; j++){
????????????????????????printf("%dx%d=%d\n",i,j,i*j);
????????????????}
????????}
????????return 0;
}

Compiler output:
a.cc:3:1: error: expected unqualified-id before '?' token
    3 | ??
      | ^
Language: C++

#include<iostream>
using namespace std;
??
int main(){
????????for(int i = 1; i <= 9; i++)
????????{
????????????????for(int j = 1; j <= 9; j++)
????????????????{
????????????????????????cout << i << "x" << j << "=" << i*j << endl;
????????????????}
????????}
????????return 0;
}

Compiler output:
a.cc:3:1: error: expected unqualified-id before '?' token
    3 | ??
      | ^
Language: C++

int main(){
    int i,j;
    for(i = 1; i < 10; i++)
        for(j = 1; j < 10; j++)
            printf("%dx%d=%d\n",i,j,i*j);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: error: 'printf' was not declared in this scope
    5 |             printf("%dx%d=%d\n",i,j,i*j);
      |             ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(){
Language: C++

class Main{
    public static void main(String[] a){
      for(int i=1;i<9;i++){
        for(int x=1;x<9;x++){
        
        System.out.println(i+"x"+x+"="+i*x);
      }

      }

      
    }
}

Compiler output:
a.cc:2:11: error: expected ':' before 'static'
    2 |     public static void main(String[] a){
      |           ^~~~~~~
      |           :
a.cc:2:29: error: 'String' has not been declared
    2 |     public static void main(String[] a){
      |                             ^~~~~~
a.cc:2:38: error: expected ',' or '...' before 'a'
    2 |     public static void main(String[] a){
      |                                      ^
a.cc:13:2: error: expected ';' after class definition
   13 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:6:9: error: 'System' was not declared in this scope
    6 |         System.out.println(i+"x"+x+"="+i*x);
      |         ^~~~~~
a.cc:6:35: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    6 |         System.out.println(i+"x"+x+"="+i*x);
      |                            ~~~~~~~^~~~
      |                                 |  |
      |                                 |  const char [2]
      |                                 const char*
Language: C++

class Main
{
    public static void main(String[] args)
    {
        for (int i = 1; i <= 9; i ++)
        {
            for (int j = 1; j <= 9; j ++)
            {
                System.out.println(i+"x"+j+"="+i*j);
            }
        }
    }
}

Compiler output:
a.cc:3:11: error: expected ':' before 'static'
    3 |     public static void main(String[] args)
      |           ^~~~~~~
      |           :
a.cc:3:29: error: 'String' has not been declared
    3 |     public static void main(String[] args)
      |                             ^~~~~~
a.cc:3:38: error: expected ',' or '...' before 'args'
    3 |     public static void main(String[] args)
      |                                      ^~~~
a.cc:13:2: error: expected ';' after class definition
   13 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:9:17: error: 'System' was not declared in this scope
    9 |                 System.out.println(i+"x"+j+"="+i*j);
      |                 ^~~~~~
a.cc:9:43: error: invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
    9 |                 System.out.println(i+"x"+j+"="+i*j);
      |                                    ~~~~~~~^~~~
      |                                         |  |
      |                                         |  const char [2]
      |                                         const char*
Language: C++

#include<iostream>
using namespace std;

int main(){
  for (int i=0; i<=9; ++i){
    for (int j=0; j<=9; ++j){
      cout << i << "x" << j << "=" << i*j endl; 
    }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:42: error: expected ';' before 'endl'
    7 |       cout << i << "x" << j << "=" << i*j endl;
      |                                          ^~~~~
      |                                          ;
Language: C++

#include<stdio.h>

int main(){
    int i, j;
    for(i=1; i<=9; i++)
        for(j=1;j<=9;j++)
            cout << i << "x" << j << "=" << i * j << endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:13: error: 'cout' was not declared in this scope
    7 |             cout << i << "x" << j << "=" << i * j << endl;
      |             ^~~~
a.cc:7:54: error: 'endl' was not declared in this scope
    7 |             cout << i << "x" << j << "=" << i * j << endl;
      |                                                      ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
for(i=1;i<10;i++){
 for(j=1;j<10;i++){
std::cout << i << 'x' << j << '=' i*j <<std::endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'i' was not declared in this scope
    5 | for(i=1;i<10;i++){
      |     ^
a.cc:6:6: error: 'j' was not declared in this scope
    6 |  for(j=1;j<10;i++){
      |      ^
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:5:18: note: to match this '{'
    5 | for(i=1;i<10;i++){
      |                  ^
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include<iostream>
using namespace std;

int main(){
for(int i=1;i<10;i++){
 for(int j=1;j<10;i++){
std::cout << i << 'x' << j << '=' i*j <<std::endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:34: error: expected ';' before 'i'
    7 | std::cout << i << 'x' << j << '=' i*j <<std::endl;
      |                                  ^~
      |                                  ;
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:5:22: note: to match this '{'
    5 | for(int i=1;i<10;i++){
      |                      ^
a.cc:9:2: error: expected '}' at end of input
    9 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include<iostream>
using namespace std;

int main(){
for(int i=1;i<10;i++){
 for(int j=1;j<10;i++){
std::cout << i << 'x' << j << '=' i*j <<std::endl;
}
}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:34: error: expected ';' before 'i'
    7 | std::cout << i << 'x' << j << '=' i*j <<std::endl;
      |                                  ^~
      |                                  ;
Language: C++

int main()
{
	int a, b;
	
	
	for (int i = 1; i < 10; i++)
	{
		for (int j = 1; j < 10; j++)
		{
			cout << i << "x" << j << "=" << i*j << endl;
		
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:25: error: 'cout' was not declared in this scope
   10 |                         cout << i << "x" << j << "=" << i*j << endl;
      |                         ^~~~
a.cc:10:64: error: 'endl' was not declared in this scope
   10 |                         cout << i << "x" << j << "=" << i*j << endl;
      |                                                                ^~~~
Language: C++

import itertools

for x, y in itertools.product(range(1, 10), range(1, 10)):
    print("%dx%d=%d" % (x, y, x * y))

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

int main() {
	int a, b;
	for (a = 1; a <= 9; a++) {
		for (b = 1; b <= 9;b++) {
			cout << a << "x" << b << "=" << a*b << "\n";
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:25: error: 'cout' was not declared in this scope
    5 |                         cout << a << "x" << b << "=" << a*b << "\n";
      |                         ^~~~
Language: C++

#include<iostream>

int main(){
  for(int i=1; i<=9; i++){
    for(int j=1; j<=9; j++){
      std::cout << i << "x" << j << "=" << i*j << std::endl
    }
  }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:60: error: expected ';' before '}' token
    6 |       std::cout << i << "x" << j << "=" << i*j << std::endl
      |                                                            ^
      |                                                            ;
    7 |     }
      |     ~
Language: C++

#include<stdio.h>

int main(void)
{
for(i=1,i<=10,i++)
{
for(j=1,i<=10,i++)
{
printf("%d",i*j);
}
}

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'i' was not declared in this scope
    5 | for(i=1,i<=10,i++)
      |     ^
a.cc:13:5: error: expected primary-expression before 'return'
   13 |     return 0;
      |     ^~~~~~
a.cc:11:2: error: expected ';' before 'return'
   11 | }
      |  ^
      |  ;
   12 | 
   13 |     return 0;
      |     ~~~~~~
a.cc:13:5: error: expected primary-expression before 'return'
   13 |     return 0;
      |     ^~~~~~
a.cc:11:2: error: expected ')' before 'return'
   11 | }
      |  ^
      |  )
   12 | 
   13 |     return 0;
      |     ~~~~~~
a.cc:5:4: note: to match this '('
    5 | for(i=1,i<=10,i++)
      |    ^
Language: C++

#include<stdio.h>

int main(void)
{
for(i=1,i<=9,i++)
for(j=1,i<=9,i++)
printf("%dx%d=%d\n",i,j,i*j);
}

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'i' was not declared in this scope
    5 | for(i=1,i<=9,i++)
      |     ^
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
a.cc:7:30: error: expected ';' before '}' token
    7 | printf("%dx%d=%d\n",i,j,i*j);
      |                              ^
      |                              ;
    8 | }
      | ~                             
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
a.cc:7:30: error: expected ')' before '}' token
    7 | printf("%dx%d=%d\n",i,j,i*j);
      |                              ^
      |                              )
    8 | }
      | ~                             
a.cc:5:4: note: to match this '('
    5 | for(i=1,i<=9,i++)
      |    ^
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
a.cc: At global scope:
a.cc:10:5: error: expected unqualified-id before 'return'
   10 |     return 0;
      |     ^~~~~~
a.cc:11:1: error: expected declaration before '}' token
   11 | }
      | ^
Language: C++

#include<stdio.h>

int main(void)
{
	int i,j;
	for(i=1,i<=9,i++)
	{
		for(j=1,j<=9,j++)
		{
			printf("%dx%d=%d",i,j,i*j)
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:25: error: expected ';' before ')' token
    6 |         for(i=1,i<=9,i++)
      |                         ^
      |                         ;
a.cc:13:9: error: expected primary-expression before 'return'
   13 |         return 0;
      |         ^~~~~~
a.cc:12:10: error: expected ';' before 'return'
   12 |         }
      |          ^
      |          ;
   13 |         return 0;
      |         ~~~~~~
a.cc:13:9: error: expected primary-expression before 'return'
   13 |         return 0;
      |         ^~~~~~
a.cc:12:10: error: expected ')' before 'return'
   12 |         }
      |          ^
      |          )
   13 |         return 0;
      |         ~~~~~~
a.cc:6:12: note: to match this '('
    6 |         for(i=1,i<=9,i++)
      |            ^
Language: C++

#include<stdio.h>

int main(){
    for(num1=0;num1<10;num1++){
       for(num2=0;num2<10;num2++){
           printf("%dx%d=%d",num1,num2,num1*num2)
        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: 'num1' was not declared in this scope
    4 |     for(num1=0;num1<10;num1++){
      |         ^~~~
a.cc:5:12: error: 'num2' was not declared in this scope
    5 |        for(num2=0;num2<10;num2++){
      |            ^~~~
Language: C++

#include<stdio.h>

main() {
	for(int i=1;i<=9;i++)
	for(int j=1;j<=9;j++)
	printf("%dx%d=%d",i,j,i*j):
}

Compiler output:
a.cc:3:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    3 | main() {
      | ^~~~
a.cc: In function 'int main()':
a.cc:6:35: error: expected ';' before ':' token
    6 |         printf("%dx%d=%d",i,j,i*j):
      |                                   ^
      |                                   ;
Language: C++

main(a,b){for(;a<10;a++){for(b=1;b<10;){printf("%dx%d=%d\n",a,b++,a*b);}}exit(0);}

Compiler output:
a.cc:1:5: error: expected constructor, destructor, or type conversion before '(' token
    1 | main(a,b){for(;a<10;a++){for(b=1;b<10;){printf("%dx%d=%d\n",a,b++,a*b);}}exit(0);}
      |     ^
Language: C++

#include<iostream>
using namespace std;

int main(){
for(int i=1;i<=9;i++){
for(int i=j;j<=9;j++){
if(i>=j){
cout << i << "x" << j << "=" << i*j << endl;
}
else
{
break;
}
}
}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: 'j' was not declared in this scope
    6 | for(int i=j;j<=9;j++){
      |           ^
Language: C++

#include<iostream>
using namespace std;
 
int main(){
for(int i=1;i<=9;i++){
for(int i=j;j<=9;j++){

cout << i << "x" << j << "=" << i*j << endl;

}
}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:11: error: 'j' was not declared in this scope
    6 | for(int i=j;j<=9;j++){
      |           ^
Language: C++

main() {
	for (int i = 1; i <= 9; i++)for (int j = 1; j <= 9; j++)printf("%dx%d=%d\n", i, j, i*j);
}

Compiler output:
a.cc:1:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    1 | main() {
      | ^~~~
a.cc: In function 'int main()':
a.cc:2:65: error: 'printf' was not declared in this scope
    2 |         for (int i = 1; i <= 9; i++)for (int j = 1; j <= 9; j++)printf("%dx%d=%d\n", i, j, i*j);
      |                                                                 ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | main() {