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

#include <iostream>
using namespace std;

int main() {
	__int64 a, b, c;
	int x;
	bool flg = true;

	while (1) {
		cin>>a;
		if (a==EOF)
			break;

		c=a+b;

		x = 1;
		flg = true;
		while (flg) {
			if ((c=c/10)>0)
				x++;
			else
				flg = false;
		}
		cout<<x<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: '__int64' was not declared in this scope; did you mean '__int64_t'?
    5 |         __int64 a, b, c;
      |         ^~~~~~~
      |         __int64_t
a.cc:10:22: error: 'a' was not declared in this scope
   10 |                 cin>>a;
      |                      ^
a.cc:14:17: error: 'c' was not declared in this scope
   14 |                 c=a+b;
      |                 ^
a.cc:14:21: error: 'b' was not declared in this scope
   14 |                 c=a+b;
      |                     ^
Language: C++

c[];main(a,b){for(;~scanf("%d%d",&a,&b);printf("%d",sprintf(c,"%d",a+b)));}

Compiler output:
a.cc:1:1: error: 'c' does not name a type
    1 | c[];main(a,b){for(;~scanf("%d%d",&a,&b);printf("%d",sprintf(c,"%d",a+b)));}
      | ^
a.cc:1:9: error: expected constructor, destructor, or type conversion before '(' token
    1 | c[];main(a,b){for(;~scanf("%d%d",&a,&b);printf("%d",sprintf(c,"%d",a+b)));}
      |         ^
Language: C++

main(a,b){for(;~scanf("%d%d",&a,&b);printf("%d\n",sprintf(&a,"%d",a+b)));}

Compiler output:
a.cc:1:5: error: expected constructor, destructor, or type conversion before '(' token
    1 | main(a,b){for(;~scanf("%d%d",&a,&b);printf("%d\n",sprintf(&a,"%d",a+b)));}
      |     ^
Language: C++

a;main(b){for(;~scanf("%d%d",&a,&b);printf("%d\n",log10(a+b)+1));}

Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a;main(b){for(;~scanf("%d%d",&a,&b);printf("%d\n",log10(a+b)+1));}
      | ^
a.cc:1:7: error: expected constructor, destructor, or type conversion before '(' token
    1 | a;main(b){for(;~scanf("%d%d",&a,&b);printf("%d\n",log10(a+b)+1));}
      |       ^
Language: C++

#include <iostream>
#include <cstdio>

using namespace std;

int digit(int num){
	if((num / 10) > 0){
		return (digit(num/10))+1;
	}
	else return 1;
}

int main(){
	int num1,num2,result=0;
	char buf[256];
	while(1){
		gets(buf);
		if(buf[0] == '\0')break;
		num1 = 0;
		num2 = 0;
		sprintf(buf,"%d %d",num1,num2);
		result += digit(num1);
		result += digit(num2);
		cout << result << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:17: error: 'gets' was not declared in this scope; did you mean 'getw'?
   17 |                 gets(buf);
      |                 ^~~~
      |                 getw
Language: C++

#include <stdio.h>
int ketasu(int atai){
	int result = 0;
	for(atai != 0){
		result++;
		atai = atai / 10;
	}
	return result;
}
int main(){
	int a, b;
	while(scanf("%d %d",&a, &b) != EOF) printf("%d\n", ketasu(a + b));
	return 0;
}

Compiler output:
a.cc: In function 'int ketasu(int)':
a.cc:4:22: error: expected ';' before ')' token
    4 |         for(atai != 0){
      |                      ^
      |                      ;
a.cc:8:9: error: expected primary-expression before 'return'
    8 |         return result;
      |         ^~~~~~
a.cc:7:10: error: expected ';' before 'return'
    7 |         }
      |          ^
      |          ;
    8 |         return result;
      |         ~~~~~~
a.cc:8:9: error: expected primary-expression before 'return'
    8 |         return result;
      |         ^~~~~~
a.cc:7:10: error: expected ')' before 'return'
    7 |         }
      |          ^
      |          )
    8 |         return result;
      |         ~~~~~~
a.cc:4:12: note: to match this '('
    4 |         for(atai != 0){
      |            ^
a.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
    9 | }
      | ^
Language: C++

#include <stdio.h>
int ketasu(int atai){
	int result = 0;
	for(atai != 0){
		result++;
		atai = atai / 10;
	}
	return result;
}
int main(){
	int a, b;
	while(scanf("%d %d",&a, &b) != -1) printf("%d\n", ketasu(a + b));
	return 0;
}

Compiler output:
a.cc: In function 'int ketasu(int)':
a.cc:4:22: error: expected ';' before ')' token
    4 |         for(atai != 0){
      |                      ^
      |                      ;
a.cc:8:9: error: expected primary-expression before 'return'
    8 |         return result;
      |         ^~~~~~
a.cc:7:10: error: expected ';' before 'return'
    7 |         }
      |          ^
      |          ;
    8 |         return result;
      |         ~~~~~~
a.cc:8:9: error: expected primary-expression before 'return'
    8 |         return result;
      |         ^~~~~~
a.cc:7:10: error: expected ')' before 'return'
    7 |         }
      |          ^
      |          )
    8 |         return result;
      |         ~~~~~~
a.cc:4:12: note: to match this '('
    4 |         for(atai != 0){
      |            ^
a.cc:9:1: warning: control reaches end of non-void function [-Wreturn-type]
    9 | }
      | ^
Language: C++

// aoj-1002.c

#include <stdio.h>

int main() {
	int a, b, temp;
	
	while(scanf("%d %d", &a, &b) != EOF) {
		printf("%d\n", sprintf(temp, "%d", a+b));
	}
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:40: error: invalid conversion from 'int' to 'char*' [-fpermissive]
    9 |                 printf("%d\n", sprintf(temp, "%d", a+b));
      |                                        ^~~~
      |                                        |
      |                                        int
In file included from a.cc:3:
/usr/include/stdio.h:365:38: note:   initializing argument 1 of 'int sprintf(char*, const char*, ...)'
  365 | extern int sprintf (char *__restrict __s,
      |                     ~~~~~~~~~~~~~~~~~^~~
Language: C++

import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()){
			int n= sc.nextInt();
			int o= sc.nextInt();
			int wa = n+o;
			System.out.println(sum(wa));
			}
		sc.close();



	}
	static int sum(int n){
		int i=1;
		int t=10;
		while(n>=t){
			t=t*10;
			i++;
			}
		return i;
	}
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.*;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:15: error: expected ':' before 'static'
    4 |         public static void main(String args[]){
      |               ^~~~~~~
      |               :
a.cc:4:33: error: 'String' has not been declared
    4 |         public static void main(String args[]){
      |                                 ^~~~~~
a.cc:26:2: error: expected ';' after class definition
   26 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:5:17: error: 'Scanner' was not declared in this scope
    5 |                 Scanner sc = new Scanner(System.in);
      |                 ^~~~~~~
a.cc:6:23: error: 'sc' was not declared in this scope
    6 |                 while(sc.hasNext()){
      |                       ^~
a.cc:10:25: error: 'System' was not declared in this scope
   10 |                         System.out.println(sum(wa));
      |                         ^~~~~~
a.cc:12:17: error: 'sc' was not declared in this scope
   12 |                 sc.close();
      |                 ^~
Language: C++

include <iostream>
using namespace std;

int main(){ 
    int a,b,cnt=1,i,j=10;

    while(cin>>a>>b){
        int add=a+b;
        while(1){
            i = add - j;
            if(i>=0)cnt++;
            else break;
            j *= 10;
        }       
        cout << cnt << endl;
    }
    return 0;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <iostream>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:7:11: error: 'cin' was not declared in this scope
    7 |     while(cin>>a>>b){
      |           ^~~
a.cc:15:9: error: 'cout' was not declared in this scope
   15 |         cout << cnt << endl;
      |         ^~~~
a.cc:15:24: error: 'endl' was not declared in this scope
   15 |         cout << cnt << endl;
      |                        ^~~~
Language: C++

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

int main()
{
	long long int m,n;
	int i;
	while(scanf("%lld %lld",&m,&n != EOF))
	{
		m += n;
		i = 0;
		while(m)
		{
			i++;
			m /= 10;
		}
		printf("%d\n",i);
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:39: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    8 |         while(scanf("%lld %lld",&m,&n != EOF))
      |                                       ^
Language: C++

#include<cstdio>
#include<cmath>

int main(){
	int a,b;
	while(scanf_s("%d %d",&a,&b) != EOF)
		printf_s("%d\n",(int)log10((double)a+b)+1);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    6 |         while(scanf_s("%d %d",&a,&b) != EOF)
      |               ^~~~~~~
      |               scanf
a.cc:7:17: error: 'printf_s' was not declared in this scope; did you mean 'printf'?
    7 |                 printf_s("%d\n",(int)log10((double)a+b)+1);
      |                 ^~~~~~~~
      |                 printf
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
{
	char buf[2000];
	int a,b,c;

	while(fgets(buf,sizeof(buf),stdin)!=NULL){
		c=1;
		a=atoi(strtok(buf," ")); b=atoi(strtok(NULL,"\n"));
		a+=b; while(a/=10) c++;

		cout<<c<<endl;

	}

}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:24: error: 'strtok' was not declared in this scope; did you mean 'strtoq'?
   18 |                 a=atoi(strtok(buf," ")); b=atoi(strtok(NULL,"\n"));
      |                        ^~~~~~
      |                        strtoq
Language: C++

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
  int a, b;
  char s[100];
  while(cin >> a >> b){
    a += b;
    sprintf(s, "%d", a);
    cout << strlen(s) << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: 'strlen' was not declared in this scope
   10 |     cout << strlen(s) << endl;
      |             ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;
Language: C++

#include <iostream>

int main(void){
while (!std::cin.eof()){
int a,b,c,i;
std::cin >> a >> b;
c=a+b;

while(!(c/=10))
i++;

std::cout << i << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:2: error: expected '}' at end of input
   13 | }
      |  ^
a.cc:3:15: note: to match this '{'
    3 | int main(void){
      |               ^
Language: C++

#include<cstdio>
#include<vector>
using namespace std;
int main(){
	int a,b;
	while(scanf("%d %d",&a,&b)!=EOF){
		vector<char> c(255);
		printf("%d\n",sprintf(c,"%d",a+b));
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:39: error: cannot convert 'std::vector<char>' to 'char*'
    8 |                 printf("%d\n",sprintf(c,"%d",a+b));
      |                                       ^
      |                                       |
      |                                       std::vector<char>
In file included from /usr/include/c++/14/cstdio:42,
                 from a.cc:1:
/usr/include/stdio.h:365:38: note:   initializing argument 1 of 'int sprintf(char*, const char*, ...)'
  365 | extern int sprintf (char *__restrict __s,
      |                     ~~~~~~~~~~~~~~~~~^~~
Language: C++

#include<cstdio>
#include<string>
using namespace std;
int main(){
	int a,b;
	while(scanf("%d %d",&a,&b)!=EOF){
		string c[255];
		printf("%d\n",sprintf(c,"%d",a+b));
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:39: error: cannot convert 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'char*'
    8 |                 printf("%d\n",sprintf(c,"%d",a+b));
      |                                       ^
      |                                       |
      |                                       std::string* {aka std::__cxx11::basic_string<char>*}
In file included from /usr/include/c++/14/cstdio:42,
                 from a.cc:1:
/usr/include/stdio.h:365:38: note:   initializing argument 1 of 'int sprintf(char*, const char*, ...)'
  365 | extern int sprintf (char *__restrict __s,
      |                     ~~~~~~~~~~~~~~~~~^~~
Language: C++

#include<cstdio.h>
int main()
{
while(true)
	{
		int a,b;
		scanf("%d %d",&a,&b);
		if(a==EOF || b==EOF)
			break;

		int temp=a+b;
		int ans=1;
		while((temp/=10)>=10)
		{
			ans++;
		}
	printf("%d\n",ans);
	}
}

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

#include<iostream>

int main()
{
	int a, b;
	while( std::cin >> a >> b ){
	 	std::cout << 1 + (int)log10( a + b ) << std::endl;
	}
	
 	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:39: error: 'log10' was not declared in this scope
    7 |                 std::cout << 1 + (int)log10( a + b ) << std::endl;
      |                                       ^~~~~
Language: C++

#include <iostream>
using namespace std;

int main()
{
int a,b,c=0,d;
while(cin>>a>>b)
{
a+=b;
while(a)
{
c++;
a/=b;
}
cout<<c<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:2: error: expected '}' at end of input
   17 | }
      |  ^
a.cc:5:1: note: to match this '{'
    5 | {
      | ^
Language: C++

a,b=gets.split.map(&:to_i);p (a+b).to_s.length

Compiler output:
a.cc:1:1: error: 'a' does not name a type
    1 | a,b=gets.split.map(&:to_i);p (a+b).to_s.length
      | ^
a.cc:1:30: error: expected constructor, destructor, or type conversion before '(' token
    1 | a,b=gets.split.map(&:to_i);p (a+b).to_s.length
      |                              ^
Language: C++

#include<iostream>
using namespace std;

int main(){
const int INF=10000000;
int a,b,c,ans;
while(cin>>a>>b){
ans=1;
a+=b;
for(i=0;i<INF;i++){
c=a%10
a-=c
if(a=0){break;}
if(a!=0){
ans++;
a/=10;}}
cout<<ans;}}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'i' was not declared in this scope
   10 | for(i=0;i<INF;i++){
      |     ^
a.cc:11:7: error: expected ';' before 'a'
   11 | c=a%10
      |       ^
      |       ;
   12 | a-=c
      | ~
Language: C++

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

int main()
{
    int IsB = 0,i = 0;
    char a[20],b[20],*digits;
    while(1){
        char str;
        scanf("%c",&str);
        if(str == EOF)break;
        if(str == ' '){
            i = 0;
            IsB = 1;
        }else if(str == '\n'){
            sprintf(digits,"%d",atoi(a) + atoi(b));
            printf("%d\n",strlen(digits));
        }else if(IsB == 0){
            a[i++] = str;
        }else{
            b[i++] = str;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:33: error: 'atoi' was not declared in this scope
   16 |             sprintf(digits,"%d",atoi(a) + atoi(b));
      |                                 ^~~~
Language: C++

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

int main()
{
    int IsB = 0,i = 0;
    char a[100],b[100],*digits;
    while(1){
        char str = '\0';
        scanf("%c",&str);
        if(str == '\0')break;
        if(str == ' '){
            i = 0;
            IsB = 1;
        }else if(str == '\n'){
            sprintf(digits,"%d",atoi(a) + atoi(b));
            printf("%d\n",strlen(digits));
            i = 0;
            IsB = 0;
        }else if(IsB == 0){
            a[i++] = str;
        }else{
            b[i++] = str;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:33: error: 'atoi' was not declared in this scope
   16 |             sprintf(digits,"%d",atoi(a) + atoi(b));
      |                                 ^~~~
Language: C++

int a;
  int b;
  int ans;
  while(cin >> a >> b){
    ans = a + b;
    if(ans>=0 && ans<=99){
      cout << "2" <<endl;
    }
    else if(ans>=100 && ans<=999){
      cout << "3" <<endl;
    }
    else if(ans>=1000 && ans<=1999){
      cout << "4" <<endl;
    }
  }
  return 0;
}

Compiler output:
a.cc:4:3: error: expected unqualified-id before 'while'
    4 |   while(cin >> a >> b){
      |   ^~~~~
a.cc:16:3: error: expected unqualified-id before 'return'
   16 |   return 0;
      |   ^~~~~~
a.cc:17:1: error: expected declaration before '}' token
   17 | }
      | ^
Language: C++

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

int main() {
  int a, b;
  while(cin >> a >> b) {
    char buff[100];
    sprintf(buff, "%d", a+b);
    cout << strlen(buff) << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: 'strlen' was not declared in this scope
   11 |     cout << strlen(buff) << endl;
      |             ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <cstdio>
  +++ |+#include <cstring>
    3 | #include <string>
Language: C++

#include<iostream>
#include<cmath>

int main(){
int a,b;
while(cin >> a >> b){
std::cout << log10(a+b)+1<< std::endl;
}
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 | while(cin >> a >> b){
      |       ^~~
      |       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++

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
class ListOfTopThreeHills
{
	static void Main(string[] args)
	{
		do
		{
			string input = Console.ReadLine();
			if (string.IsNullOrEmpty(input))
			{
				break;
			}
                 string[] inputArr = input.Split(' ');
                 int a = int.Parse(inputArr[0]);
                 int b = int.Parse(inputArr[1]);
                 int sum = a + b;
                 Console.WriteLine(sum.ToString().Length);
		} while (true);
	}
}

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;
      |       ^~~~~~
a.cc:3:7: error: expected nested-name-specifier before 'System'
    3 | using System.Collections.Generic;
      |       ^~~~~~
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.IO;
      |       ^~~~~~
a.cc:8:26: error: 'string' has not been declared
    8 |         static void Main(string[] args)
      |                          ^~~~~~
a.cc:8:35: error: expected ',' or '...' before 'args'
    8 |         static void Main(string[] args)
      |                                   ^~~~
a.cc:24:2: error: expected ';' after class definition
   24 | }
      |  ^
      |  ;
a.cc: In static member function 'static void ListOfTopThreeHills::Main(int*)':
a.cc:12:25: error: 'string' was not declared in this scope
   12 |                         string input = Console.ReadLine();
      |                         ^~~~~~
a.cc:13:50: error: 'input' was not declared in this scope; did you mean 'int'?
   13 |                         if (string.IsNullOrEmpty(input))
      |                                                  ^~~~~
      |                                                  int
a.cc:17:25: error: expected primary-expression before ']' token
   17 |                  string[] inputArr = input.Split(' ');
      |                         ^
a.cc:18:26: error: expected primary-expression before 'int'
   18 |                  int a = int.Parse(inputArr[0]);
      |                          ^~~
a.cc:19:26: error: expected primary-expression before 'int'
   19 |                  int b = int.Parse(inputArr[1]);
      |                          ^~~
a.cc:21:18: error: 'Console' was not declared in this scope
   21 |                  Console.WriteLine(sum.ToString().Length);
      |                  ^~~~~~~
a.cc:21:40: error: request for member 'ToString' in 'sum', which is of non-class type 'int'
   21 |                  Console.WriteLine(sum.ToString().Length);
      |                                        ^~~~~~~~
Language: C++

#include <math>
#include <cstdio>

using namespace std;

int main() {
	int a, b;
	while(scanf("%d %d", &a, &b) != EOF){
		printf("%d\n", log10(a+b));
	}
	return 0;
}

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

#include <cstdio>
#include <string>

int main() {
    int ch;
    int a, b;
    char str[255];
    ch = 0;
    while (ch != EOF) {
          scanf("%d %d", &a, &b);
          sprintf(str, "%d", a + b);          
          printf("%d\n", strlen(str));   
          ch = getchar();
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:26: error: 'strlen' was not declared in this scope
   12 |           printf("%d\n", strlen(str));
      |                          ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <string>
  +++ |+#include <cstring>
    3 |
Language: C++

#include <cstdio>
#include <string>

int main() {
    int ch;
    int a, b;
    char str[255];
    ch = 0;
    while (ch != EOF) {
          scanf("%d %d", &a, &b);
          sprintf(str, "%d", a + b);          
          b = strlen(str);
          printf("%d\n", b);   
          ch = getchar();
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:15: error: 'strlen' was not declared in this scope
   12 |           b = strlen(str);
      |               ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <string>
  +++ |+#include <cstring>
    3 |
Language: C++

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

int main(){
    int a,b;
    char s1[20];
    while(gets(s1))!=EOF{
        int len=strlen(s1)-1;
        printf("%d\n",len);
        fflush(stdin);
        fflush(stdout);
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:11: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |     while(gets(s1))!=EOF{
      |           ^~~~
      |           getw
a.cc:9:20: error: expected primary-expression before '!=' token
    9 |     while(gets(s1))!=EOF{
      |                    ^~
Language: C++

#include <iostream>
using namespace std;
int main(){
cin>> a b;
int c = a + b;
int d = 0;
while(c!=0){
c/=10;
d++;
}
cout<<d<<endl;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:7: error: 'a' was not declared in this scope
    4 | cin>> a b;
      |       ^
a.cc:5:13: error: 'b' was not declared in this scope
    5 | int c = a + b;
      |             ^
Language: C++

while line = gets do
    p ->(l){(l[0]+l[1]).to_s.size}.call line.split(' ').map(&:to_i)
end

Compiler output:
a.cc:1:1: error: expected unqualified-id before 'while'
    1 | while line = gets do
      | ^~~~~
a.cc:2:35: error: expected unqualified-id before '.' token
    2 |     p ->(l){(l[0]+l[1]).to_s.size}.call line.split(' ').map(&:to_i)
      |                                   ^
Language: C++

#include <iostream>
using namespace std;

void main(){
int a,b,c,d=0;
cin>>a>>b;
c=a+b;
while(c>0){
c/=10;
d++;
}
cout<<d;
}

Compiler output:
a.cc:4:1: error: '::main' must return 'int'
    4 | void main(){
      | ^~~~
Language: C++

#include <iostream>
using namespace std;
 
int main(){
int a,b,c=0;
while(cin>>a>>b)
a+=b;c=0;
while(a>0){
a/=10;c++;
}
cout<<c<<endl;
}
return 0;
}

Compiler output:
a.cc:13:1: error: expected unqualified-id before 'return'
   13 | return 0;
      | ^~~~~~
a.cc:14:1: error: expected declaration before '}' token
   14 | }
      | ^
Language: C++

#include <iostream>
#include <iomanip>
#include <stdio.h>
using namespace std;

double* solve_equations(int *a)
{
	// クラメルの公式を用いる
	int data_size=sizeof(a[0]);
	/*cout << "data_size=" << data_size << endl;
	cout << "a=" << a << endl;
	cout << "*(a + data_size*1)=" << *(a + 1) << endl;
	cout << "*(a + data_size*0) * *(a + data_size*4)" << *(a + data_size*0) * *(a + data_size*4) << endl; */
	int z = *(a + 0) * *(a + 4) 
		  - *(a + 1) * *(a + 3);
	int x = *(a + 2) * *(a + 4)
		  -	*(a + 1) * *(a + 5);
	int y = *(a + 0) * *(a + 5)
		  - *(a + 2) * *(a + 3);  
	double ax,ay;
	/*cout << "x=" << x << endl;
	cout << "y=" << y << endl;*/
	ax = pow(z,-1)*x;
	ay = pow(z,-1)*y;
	
	/* cout << ax << endl;
	cout << ay << endl; */
	double ans[2] = {ax,ay};
	return ans;
}

int main()
{
	int n[6];
	int s;
	int i=0;
	while (cin >> s){
		if (i == 5){
			n[i]=s;
			for (int j=0;j<=5;j++)
			{
				cout << "n[" << j << "]=" << n[j] << endl;
			}
			double* an;
			an = solve_equations(n);
			/* printf("%.3lf",*(an+0));
			cout << " " << endl;
			printf("%.3lf",*(an+1)); */
			cout << fixed << setprecision(3) << an[1] << " " << an[0] << endl;

			i = 0;}
		else{
			n[i]=s;
			i++;
		}
	}
	return 0;
			// cout << l[0]  endl;
}

Compiler output:
a.cc: In function 'double* solve_equations(int*)':
a.cc:23:14: error: 'pow' was not declared in this scope
   23 |         ax = pow(z,-1)*x;
      |              ^~~
a.cc:29:16: warning: address of local variable 'ans' returned [-Wreturn-local-addr]
   29 |         return ans;
      |                ^~~
a.cc:28:16: note: declared here
   28 |         double ans[2] = {ax,ay};
      |                ^~~
Language: C++

#include <iostream>
#include <cstring>
#include <cstdlib>

using namespace std;


int main(){
	int a,b;
	while (cin >>  a >>  b){
		int l = a+b;
		char n[50];
		itoa(l,n,10);
		cout << strlen(n) << endl;
	
	}
	return 0;
	}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:17: error: 'itoa' was not declared in this scope
   13 |                 itoa(l,n,10);
      |                 ^~~~
Language: C++

#include <iostream>
//#include <cstring>
#include <cstdio>

using namespace std;


int main(){
	int a,b;
	while (cin >>  a >>  b){
		int l = a+b;
		char n[50];
		l=sprintf (n,"%d",a+b);
		cout << l << endl;
	
	}
	return 0;
	}
	}

Compiler output:
a.cc:19:9: error: expected declaration before '}' token
   19 |         }
      |         ^
Language: C++

#include <iostream>

using namespace std;

int main(){
	int n, m, dig;
    while(cin >> n >> m){
        n += m;
        while(n){
            sum /= 10;
            dig++;
        }
        cout << dig << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: error: 'sum' was not declared in this scope
   10 |             sum /= 10;
      |             ^~~
Language: C++

#include <stdio.h>

int digit( x );

int main(){
  int a, b;
  int x;

  while( scanf("%d %d", &a, &b) != EOF){
    x = digit( a+b );
    printf("%d\n", x);
  }
  return 0;
}

int digit( x ){
  int c=1;
  while( (x / 10) != 0){
    x /= 10;
    c++;
  }
  return c;
}

Compiler output:
a.cc:3:12: error: 'x' was not declared in this scope
    3 | int digit( x );
      |            ^
a.cc: In function 'int main()':
a.cc:10:14: error: 'digit' cannot be used as a function
   10 |     x = digit( a+b );
      |         ~~~~~^~~~~~~
a.cc: At global scope:
a.cc:16:5: error: redefinition of 'int digit'
   16 | int digit( x ){
      |     ^~~~~
a.cc:3:5: note: 'int digit' previously defined here
    3 | int digit( x );
      |     ^~~~~
a.cc:16:12: error: 'x' was not declared in this scope
   16 | int digit( x ){
      |            ^
Language: C++

#include <stdio.h>

//int digit( x );
int digit( x ){
  int c=1;
  while( (x / 10) != 0){
    x /= 10;
    c++;
  }
  return c;
}
int main(){
  int a, b;
  int x;

  while( scanf("%d %d", &a, &b) != EOF){
    x = digit( a+b );
    printf("%d\n", x);
  }
  return 0;
}

Compiler output:
a.cc:4:12: error: 'x' was not declared in this scope
    4 | int digit( x ){
      |            ^
a.cc: In function 'int main()':
a.cc:17:14: error: 'digit' cannot be used as a function
   17 |     x = digit( a+b );
      |         ~~~~~^~~~~~~
Language: C++

#include<iostream>
int main(){
	int a,b;
	std::cin>>a>>b;
	int c=a+b;
	if(c/1000000>=1)std::cout<<7<<std::endl;
	else if(c/100000>=1)std::cout<<6<<std::endl;
	else if(c/10000>=1)std::cout<<5<<std::endl;
	else if(c/1000>=1)std::cout<<4<<std::endl;
	else if(c/100>=1)std::cout<<3<<std::endl;
	else if(c/10>=1)std::cout<<2<<std::endl
	else std::cout<<1<<std::endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:48: error: expected ';' before 'else'
   11 |         else if(c/10>=1)std::cout<<2<<std::endl
      |                                                ^
      |                                                ;
   12 |         else std::cout<<1<<std::endl;
      |         ~~~~
Language: C++

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



int main() {

//変数の宣言

	int a,b,sum,i=0;



/////メイン処理/////


	while(cin>>a>>b){ 
//入力
		sum = a + b;
//桁数の計算
	
		while(1){
			if (pow(10,i)<=sum && pow(10,i+1) > sum){
				cout << i+1 <<endl;
				break;
			}
			i++;
		}
		
		i = 0
	}
	
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:22: error: expected ';' before '}' token
   31 |                 i = 0
      |                      ^
      |                      ;
   32 |         }
      |         ~
Language: C++

#include<iostream>
#include<stdio.h>

using namespace std;

int main(){
	int num1,num2;
	char str[10];
	int i;

	// 値の入力
	cin >> num1 >> num2;

	//整形
	sprintf_s(str,"%d\0",(num1 + num2));

	// 文字数計測
	for(i=0;str[i] != '\0';i++){
	}

	// 文字数表示
	cout << i << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'sprintf_s' was not declared in this scope; did you mean 'sprintf'?
   15 |         sprintf_s(str,"%d\0",(num1 + num2));
      |         ^~~~~~~~~
      |         sprintf
Language: C++

#include<iostream>
#include<stdio.h>

using namespace std;

int main(){
	int num1,num2;
	char str[10];
	int i;

while(1){

	// 値の入力
	cin >> num1 >> num2;

	//整形
	sprintf_s(str,"%d\0",(num1 + num2));

	// 文字数計測
	for(i=0;str[i] != '\0';i++){
	}

	// 文字数表示
	cout << i << endl;

}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'sprintf_s' was not declared in this scope; did you mean 'sprintf'?
   17 |         sprintf_s(str,"%d\0",(num1 + num2));
      |         ^~~~~~~~~
      |         sprintf
Language: C++

#include<iostream>
#include<stdio.h>

#define     MAX_NUMBER     200

using namespace std;

int main(){
	int num1,num2;
	char str[10];
	int i;

	while(cin >> num1 >> num2){
		//整形
		sprintf_s(str,"%d\0",(num1 + num2));

		// 文字数計測
		for(i=0;str[i] != '\0';i++){
		}

		// 文字数表示
		cout << i << endl;
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:17: error: 'sprintf_s' was not declared in this scope; did you mean 'sprintf'?
   15 |                 sprintf_s(str,"%d\0",(num1 + num2));
      |                 ^~~~~~~~~
      |                 sprintf
Language: C++

#include <iostream>

using namespace std;
	int main() {
		int a,b,c,d;
		c=a+b;
		if(a<=1000000&&b<=1000000){
			for(int i=0;i<200;i++){
				for(int j=0;j<8;j++){
				d=c/10;
				if(d<1){
					cout<<j+1<<endl;}
				else {
					break;
				}
			}
		}
		return 0;
	}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:10: error: expected '}' at end of input
   19 |         }
      |          ^
a.cc:4:20: note: to match this '{'
    4 |         int main() {
      |                    ^
Language: C++

#include<cstdio>
int main(){for(int a,b;~scanf("%d%d",&a,&b);printf("%d\n",sprintf(char* &a,"%d",a+b)));}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:67: error: expected primary-expression before 'char'
    2 | int main(){for(int a,b;~scanf("%d%d",&a,&b);printf("%d\n",sprintf(char* &a,"%d",a+b)));}
      |                                                                   ^~~~
Language: C++

#include <iostream>
#include <cmath>
using namespace std;
 
int main()
{
    int a,b;
    while(cin >> a >> b)
        cout << log10(a+b) + 1; << '\n';
 
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:33: error: expected primary-expression before '<<' token
    9 |         cout << log10(a+b) + 1; << '\n';
      |                                 ^~
Language: C++

#include<stdioi.h>
int main(void)
{
	int a,b,i,sum;
	
	while(scanf("%d %d",&a,&b)!=EOF) {
		sum=a+b;

		i=0;
		while(sum>0)	{
			sum=sum/10;
			i++;
		}
		printf("%d\n",i);
	}
	return 0;
}

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

#include <iostream>

int main(){
	int cnt;
	while(std::cin>>a>>b){
		for(int i=10,cnt=0;;i*=10,cnt++){
			if((a+b)/i==0){
				std::cout<<cnt<<'\n';
				break;
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:25: error: 'a' was not declared in this scope
    5 |         while(std::cin>>a>>b){
      |                         ^
a.cc:5:28: error: 'b' was not declared in this scope
    5 |         while(std::cin>>a>>b){
      |                            ^
Language: C++

main(a,b,i=1,x){for(scanf("%d%d",&a,&b),x=a+b;x/=10;i++);printf("%d\n",i);}

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

main(a,b,i=1,x){for(scanf("%d%d",&a,&b),x=a+b;x=x/10;i++);printf("%d\n",i);}

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

main(a,b,i,x){for(;scanf("%d%d",&a,&b)!=-1;){for(x=a+b,i=1;x=x/10;i++);printf("%d\n",i);}}

Compiler output:
a.cc:1:5: error: expected constructor, destructor, or type conversion before '(' token
    1 | main(a,b,i,x){for(;scanf("%d%d",&a,&b)!=-1;){for(x=a+b,i=1;x=x/10;i++);printf("%d\n",i);}}
      |     ^
Language: C++

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

int main()
{
    long long int num,a,b,sum,i,j,k,len;
    char str[1000],ch[1000];
    while(scanf("%lld %lld",&a,&b)==2)
    {
        sum=a+b;
        itoa(sum,str,10);
        len=strlen(str);
        printf("%lld\n",len);
    }
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:9: error: 'itoa' was not declared in this scope
   12 |         itoa(sum,str,10);
      |         ^~~~
Language: C++

package aoj.q0002; // 投稿時に削除

public class Main {
	public static void Main(String[] args) {
	
		int a =342;
		int b =652;
		int X =a+b;
		int keta = Integer.toString(X).length();

		while(0<X){
			X/= 10;
			}
     System.out.println(keta+1);


	}
}

Compiler output:
a.cc:1:1: error: 'package' does not name a type
    1 | package aoj.q0002; // 投稿時に削除
      | ^~~~~~~
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

#include<iostream>
int main(){

for(int k=0;k<200;k++){
int i,j;
cin >> i >> j;
cout << i+j << endl;
}

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 | cin >> i >> j;
      | ^~~
      | 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:7:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 | cout << i+j << 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:7:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 | cout << 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>
#include <conio.h>
using namespace std ;

int datas[2][200] ;
int datanum ;

int sum[200] ;
int solve[200] ;

int main()
{
	cin >> datanum ;

	for( int i = 0 ; i < datanum ; i ++ )
	{
		cin >> datas[0][i] ;
		cin >> datas[1][i] ;

		sum[i] = datas[0][i] + datas[1][i] ;
	}

	for( int i = 0 ; i < datanum ; i ++ )
	{
		for( int j = 1 ; j < 7 ; j ++ )
		{
			if( (sum[i] / 10*j) < 10 )
			{
				solve[i] = j+1 ;
				j = 10 ;

				cout << solve[i] << "\n" ;
			}
		}
	}

	_getch() ;
	return 0 ;
}

Compiler output:
a.cc:2:10: fatal error: conio.h: No such file or directory
    2 | #include <conio.h>
      |          ^~~~~~~~~
compilation terminated.
Language: C++

#include<iostream> 
#include<cstdio> using namespace std; int main() { int a,b; while(scanf("%d%d",&a,&b)!=EOF) { int x=a+b; int cnt=0; while(x) { cnt++; x/=10; } printf("%d\n",cnt); } return 0; }

Compiler output:
a.cc:2:18: warning: extra tokens at end of #include directive
    2 | #include<cstdio> using namespace std; int main() { int a,b; while(scanf("%d%d",&a,&b)!=EOF) { int x=a+b; int cnt=0; while(x) { cnt++; x/=10; } printf("%d\n",cnt); } return 0; }
      |                  ^~~~~
/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<iostream>
int main(){
	int a,b;
	while(std::cin>>a>>b)
		a=log10(a+b)+1,std::cout<<a<<std::endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:19: error: 'log10' was not declared in this scope
    5 |                 a=log10(a+b)+1,std::cout<<a<<std::endl;
      |                   ^~~~~
Language: C++

#include<iostream>
int main(){
	int a,b;
	while(std::cin>>a>>b){
               a=log10(a+b)+1;
               std::cout<<a<<std::endl;
             }
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:18: error: 'log10' was not declared in this scope
    5 |                a=log10(a+b)+1;
      |                  ^~~~~
Language: C++

#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <string>
#include <cstdio>
using namespace std;
int main()
{
	int m,n;
	while(cin>>m>>n)
		cout<<ceil(log10((double)(m+n+1)))<<endl;
	getchar();
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:28: error: 'log10' was not declared in this scope
   12 |                 cout<<ceil(log10((double)(m+n+1)))<<endl;
      |                            ^~~~~
a.cc:12:23: error: 'ceil' was not declared in this scope
   12 |                 cout<<ceil(log10((double)(m+n+1)))<<endl;
      |                       ^~~~
Language: C++

#include <iostream>  
  
using namespace std;  
   
  
int main()   
{  
    int n1,n2;
     cin>> n1;
     cin>> n2;
      int sum;
       sum= n1 + n2;
       while(sum)
{
        int d;
        int count= 0;
        d= sum % 10;
        count++;
        sum= sum / 10;
}
     cout<<count<<endl;
}   

Compiler output:
a.cc: In function 'int main()':
a.cc:21:12: error: 'count' was not declared in this scope
   21 |      cout<<count<<endl;
      |            ^~~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
	int a, b;
	while (cin >> a >> b){
		cout << (int)(log10((double)(a + b)) + 1)<< '\n';
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:31: error: 'log10' was not declared in this scope
    7 |                 cout << (int)(log10((double)(a + b)) + 1)<< '\n';
      |                               ^~~~~
Language: C++

#include<cstdio>
using namespace std;
int main()
{
int a,b;
while(scanf("%d%d",&a,&b)!=EOF){
int x=a+b;
for(int i=0;i<8;i++){
if(x<(1ei) printf("%d\n",i);
}
}
return 0;
}

Compiler output:
a.cc:9:7: error: exponent has no digits
    9 | if(x<(1ei) printf("%d\n",i);
      |       ^~~
a.cc: In function 'int main()':
a.cc:10:1: error: expected primary-expression before '}' token
   10 | }
      | ^
a.cc:9:29: error: expected ')' before '}' token
    9 | if(x<(1ei) printf("%d\n",i);
      |   ~                         ^
      |                             )
   10 | }
      | ~                            
a.cc:10:1: error: expected primary-expression before '}' token
   10 | }
      | ^
Language: C++

#include<cstdio>
using namespace std;
int main()
{
int a,b;
while(scanf("%d%d",&a,&b)!=EOF){
int x=a+b;
for(int i=0;i<8;i++){
if(x<(1ei)){ printf("%d\n",i);}
}
}
return 0;
}

Compiler output:
a.cc:9:7: error: exponent has no digits
    9 | if(x<(1ei)){ printf("%d\n",i);}
      |       ^~~
Language: C++

#include<cstdio>
using namespace std;
int main()
{
int a,b;
while(scanf("%d%d",&a,&b)!=EOF){
int x=a+b;
for(int i=0;i<8;i++){
if(x<(1ei))printf("%d\n",i);
}
}
return 0;
}

Compiler output:
a.cc:9:7: error: exponent has no digits
    9 | if(x<(1ei))printf("%d\n",i);
      |       ^~~
Language: C++

#include<iostream>
using namespace std;
int main()
{
	int a, b;
	while (scanf_s("%d%d",&a,&b)!= EOF)
	{
		int l=1;
		int k = a + b;
		while (k / 10)
		{
			l++;
			k /= 10;
		}
	cout << l << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:16: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
    6 |         while (scanf_s("%d%d",&a,&b)!= EOF)
      |                ^~~~~~~
      |                scanf
Language: C++

#include<iostream>
#include<cstdlib>
#include<string>

using namespace std;

int main()
{
	int a, b;
	string s;
	char sp[8];
	while(cin >> a >> b)
	{
		itoa(a + b, sp, 10);
		s = sp;
		cout << s.size() << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:17: error: 'itoa' was not declared in this scope
   14 |                 itoa(a + b, sp, 10);
      |                 ^~~~
Language: C++

#include <stdio.h>

int main( void ){
    int a,b;
    scanf( "%d %d",&a,&b );
    a = a + b;

    int n = 1;
    int j = 0;
    while( a / n > 0 ){
        n *= 10;
        j++;
    }

    printf( "%d",j );
    

Compiler output:
a.cc: In function 'int main()':
a.cc:15:22: error: expected '}' at end of input
   15 |     printf( "%d",j );
      |                      ^
a.cc:3:17: note: to match this '{'
    3 | int main( void ){
      |                 ^
Language: C++

#include <stdio.h>
int main( void ){
do{
	int a,b;
	scanf( "%d %d",&a,&b );  
	a = a + b;   
	int n = 1;  
	int j = 0;  
	while( true ){    
		if( a / n >= 1 ) n *= 10;    
		else               break;  
		j++;  
		}  
	printf( "%d",j ); 
}while( l < 200;l++ );
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'l' was not declared in this scope
   15 | }while( l < 200;l++ );
      |         ^
a.cc:15:16: error: expected ')' before ';' token
   15 | }while( l < 200;l++ );
      |       ~        ^
      |                )
Language: C++

#include <stdio.h>int main( void ){
    int l = 0;
do{    int a,b;    scanf( "%d %d",&a,&b );      a = a + b;       int n = 1;      int j = 0;      while( true ){            if( a / n >= 1 ) n *= 10;            else               break;          j++;          }      printf( "%d",j ); }while( l < 200;l++ );    return 0;}

Compiler output:
a.cc:1:23: warning: extra tokens at end of #include directive
    1 | #include <stdio.h>int main( void ){
      |                       ^~~~
a.cc:1:10: fatal error: stdio.h>in: No such file or directory
    1 | #include <stdio.h>int main( void ){
      |          ^~~~~~~~~~~~
compilation terminated.
Language: C++

#include <stdio.h>int main( void ){
   int l = 0;
while( l < 200 )    int a,b;    scanf( "%d %d",&a,&b );      a = a + b;       int n = 1;      int j = 0;      while( true ){            if( a / n >= 1 ) n *= 10;            else               break;          j++;          }      printf( "%d",j );
 l++;
 }return 0;}

Compiler output:
a.cc:1:23: warning: extra tokens at end of #include directive
    1 | #include <stdio.h>int main( void ){
      |                       ^~~~
a.cc:1:10: fatal error: stdio.h>in: No such file or directory
    1 | #include <stdio.h>int main( void ){
      |          ^~~~~~~~~~~~
compilation terminated.
Language: C++

#include<stdio.h>
#include<string.h>
int main(void)
{
    long int a,b,c,d;
    char bb[7];
    while((scanf("%d %d",&a,&b))==2)
    {
        c= a+b;
        itoa(c,bb,10);
       d = strlen(bb);
      printf("%d\n",d);
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'itoa' was not declared in this scope
   10 |         itoa(c,bb,10);
      |         ^~~~
Language: C++

#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>

using namespace std;

int main(){
	int a, b, c, s;
	while(cin >> a >> b){
		c = 1;
		s = a + b;
		while(s = s / 10, s){
			c++;
		}
		cout << c << "\n";
	}
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:18:18: error: expected '}' at end of input
   18 |         return 0;
      |                  ^
a.cc:8:11: note: to match this '{'
    8 | int main(){
      |           ^
Language: C++

mergesort(A[],B[])
{
   i=0,j=0;
   while i<=l1 && j<=l2
   {
   	  if A[i]<B[j] then C.push(A[i]);i++;
		           else C.push(B[j]);j++; 
   }	
   if (i<l1) while(i<=l1) C.push(A[i++]);
   if (j<l2) while(j<=l2) C.push(B[j++]);
}

Compiler output:
a.cc:1:10: error: expected constructor, destructor, or type conversion before '(' token
    1 | mergesort(A[],B[])
      |          ^
Language: C++

#include <stdio.h>

int main(){

	int a=0,b=0;

	while (scanf("%d%d", &a, &b)!=EOF){
		
		if (a + b < 1000000){
			printf("6\n");
		}else if(a + b < 100000){
			printf("5\n");
		}else if (a + b < 10000){
			printf("4\n");
		}else if (a + b < 1000){
			printf("3\n");
		}else if (a + b < 100){
			printf("2\n"); 
		}else if (a + b < 10){
			printf("1\n",x);
		}
	}
	return 0;
｝

Compiler output:
a.cc: In function 'int main()':
a.cc:20:38: error: 'x' was not declared in this scope
   20 |                         printf("1\n",x);
      |                                      ^
a.cc:24:1: error: '\U0000ff5d' was not declared in this scope
   24 | ｝
      | ^~
a.cc:24:3: error: expected '}' at end of input
   24 | ｝
      |   ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

#include <stdio.h>

int main(){

	int a=0,b=0;

	while (scanf("%d%d", &a, &b)!=EOF){
		
		if (a + b < 1000000){
			printf("6\n");
		}else if(a + b < 100000){
			printf("5\n");
		}else if (a + b < 10000){
			printf("4\n");
		}else if (a + b < 1000){
			printf("3\n");
		}else if (a + b < 100){
			printf("2\n"); 
		}else if (a + b < 10){
			printf("1\n",x);
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:38: error: 'x' was not declared in this scope
   20 |                         printf("1\n",x);
      |                                      ^
Language: C++

#include <stdio.h>

int main(){

	int a=0,b=0,x=0;

	while (scanf("%d%d", &a, &b)!=EOF){
		
		if (a + b < 1000000){
			x=6;
		}else if(a + b < 100000){
			x=5;
		}else if (a + b < 10000){
			x=4;
		}else if (a + b < 1000){
			x=3;
		}else if (a + b < 100){
			x=2; 
		}else(a + b < 10){
			x=1;
		}printf("%d\n", x);
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:34: error: expected ';' before '{' token
   19 |                 }else(a + b < 10){
      |                                  ^
      |                                  ;