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

int main()
{
  int a,b;
  int count1=0,count2=0;
  int sum;
  while(scanf("%d%d",&a,&b)!= EOF)
  {
   while(a < 1000000 && a>0)
    {
     a /= 10;
     count1++;
    }
   while(b < 1000000 && b>0)
    {
     b /= 10;
     count2++;
    }
   sum = count1+count2;
   printf("%d\n",sum);
   count1=0;
   count2=0;
   sum=0;

  }
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:6:9: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    6 |   while(scanf("%d%d",&a,&b)!= EOF)
      |         ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main()
main.c:6:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    6 |   while(scanf("%d%d",&a,&b)!= EOF)
      |         ^~~~~
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:6:31: error: 'EOF' undeclared (first use in this function)
    6 |   while(scanf("%d%d",&a,&b)!= EOF)
      |                               ^~~
main.c:6:31: note: 'EOF' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:6:31: note: each undeclared identifier is reported only once for each function it appears in
main.c:19:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   19 |    printf("%d\n",sum);
      |    ^~~~~~
main.c:19:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:19:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:19:4: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

int main()
{
  int a,b;
  int count1=0,count2=0;
  int sum;
  while(scanf("%d%d", &a, &b)!=EOF)
  {
   while(a < 1000000 && a>0)
    {
     a /= 10;
     count1++;
    }
   while(b < 1000000 && b>0)
    {
     b /= 10;
     count2++;
    }
   sum = count1+count2;
   printf("%d\n",sum);
   count1=0;
   count2=0;
   sum=0;

  }
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:6:9: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    6 |   while(scanf("%d%d", &a, &b)!=EOF)
      |         ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main()
main.c:6:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    6 |   while(scanf("%d%d", &a, &b)!=EOF)
      |         ^~~~~
main.c:6:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:6:32: error: 'EOF' undeclared (first use in this function)
    6 |   while(scanf("%d%d", &a, &b)!=EOF)
      |                                ^~~
main.c:6:32: note: 'EOF' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:6:32: note: each undeclared identifier is reported only once for each function it appears in
main.c:19:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   19 |    printf("%d\n",sum);
      |    ^~~~~~
main.c:19:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:19:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:19:4: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

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

int main()
{
    int a,b;
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        if(a>=0&&b>=0&&a<=1000000&&b<=1000000)
        {
            int n=a+b,count=0;
            while(n)
            {
                count++;
                n/=10;
            }
            printf("%d\n",count);
        }
    }
   


Compiler output:
main.c: In function 'main':
main.c:19:5: error: expected declaration or statement at end of input
   19 |     }
      |     ^
Language: C

/*林承謙 107000108 不分系22*/ 

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

int main(int argc, char *argv[]) {
	
	int a1,b1,sum1,tenpower1,i1,digit1;
	
	while(scanf("%d %d", &a1, &b1)!=EOF) {
		
	sum1=a1+b1;i1=0;digit1=-1;

	
	do{
		
		tenpower1=pow(10,i1);
		digit1=digit1+1;
		i1++;
		
	}while(sum1/tenpower1>=1);
	
	printf("%d\n",digit1);
	

    
}
	

	
return(0);	


Compiler output:
main.c: In function 'main':
main.c:32:1: error: expected declaration or statement at end of input
   32 | return(0);
      | ^~~~~~
Language: C

/* 1.Ask the user to enter two numbers and calculate the sum of the two number
   2.Divide sum by 10 , if the result is bigger than 10 , number of digits increase by 1  */
   
#include <stdio.h>
#include <stdlib.h>

int main()
{
    /* 1.Ask the user to enter two numbers and calculate the sum of the two number */
    int a=0 , b=0;
    float sum=0 , sumDivided=0; /* Sum be divided by 10 repeatedly */
    int numberOfDigits=0; /* number of digits of sum */
    int i=0; /* for for loop */

    printf("Please enter two numbers\n");
    while(scanf("%d%d" ,&a ,&b)!=EOF)
    {

    /* 2.Divide sum by 10 , then increase the number of digits by 1 , and if the result is bigger than 10 ,
         repeat this action again */
    sum = a + b;
    sumDivided = sum;

    if(sum<10)
    {
        numberOfDigits = 1;
    }
    else
    {
        for(i=1 ; sumDivided>10 ; i++)
        {
            sumDivided = sumDivided / 10.0;
        }

        numberOfDigits = i;
    }

    printf("Digits of numbers is %d\n" ,numberOfDigits);

    }
    return 0;
}
 @WendyUsingGithub
   
 


Compiler output:
main.c:43:2: error: stray '@' in program
   43 |  @WendyUsingGithub
      |  ^
main.c:43:2: error: expected '=', ',', ';', 'asm' or '__attribute__' at end of input
Language: C

int main(int argc, char *argv[]) {
	 int num1,num2,i,num3;
	 while(scanf("%d%d",&num1, &num2)!=EOF){
	 i = 0;
			num3 = num1 + num2; 
			while (num3 >= 1){
			num3 /= 10 ; 
		 	i++;
	}
		printf ("%d",i);
}
	return 0;

}


Compiler output:
main.c: In function 'main':
main.c:3:16: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    3 |          while(scanf("%d%d",&num1, &num2)!=EOF){
      |                ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main(int argc, char *argv[]) {
main.c:3:16: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    3 |          while(scanf("%d%d",&num1, &num2)!=EOF){
      |                ^~~~~
main.c:3:16: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:3:44: error: 'EOF' undeclared (first use in this function)
    3 |          while(scanf("%d%d",&num1, &num2)!=EOF){
      |                                            ^~~
main.c:3:44: note: 'EOF' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:3:44: note: each undeclared identifier is reported only once for each function it appears in
main.c:10:17: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   10 |                 printf ("%d",i);
      |                 ^~~~~~
main.c:10:17: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:10:17: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:10:17: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <stdio.h>

int main(int argc, const char * argv[]) {
    // insert code here...
    int a=0,b=0;
    printf("請輸入兩個數字(並用空白鍵隔開）：");
    scanf("%d %d",&a,&b);
    int sum=0;
    sum = a+b;
    double i =0.0;
    int pow_result1=0;
    int pow_result2=0;
    for(i=0;i<6;i++){
        pow_result1 = 10^i;
        pow_result2 = 10^(i+1);
        if(sum>pow_result1&& sum<pow_result2)
            printf("number of digits of a + b is %f\n",i+1);
        if(sum == pow(10,i+1))
            printf("number of digits of a + b is %f\n",i+2);
    }
}


Compiler output:
main.c: In function 'main':
main.c:14:25: error: invalid operands to binary ^ (have 'int' and 'double')
   14 |         pow_result1 = 10^i;
      |                         ^
main.c:15:25: error: invalid operands to binary ^ (have 'int' and 'double')
   15 |         pow_result2 = 10^(i+1);
      |                         ^~~~~~
      |                            |
      |                            double
main.c:18:19: error: implicit declaration of function 'pow' [-Wimplicit-function-declaration]
   18 |         if(sum == pow(10,i+1))
      |                   ^~~
main.c:2:1: note: include '<math.h>' or provide a declaration of 'pow'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
main.c:18:19: warning: incompatible implicit declaration of built-in function 'pow' [-Wbuiltin-declaration-mismatch]
   18 |         if(sum == pow(10,i+1))
      |                   ^~~
main.c:18:19: note: include '<math.h>' or provide a declaration of 'pow'
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:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#pragma comment (linker,"/STACK:102400000,102400000")
#include <iostream>
#include <cstdio>
#include <cstring>
#include <vector>
#include <set>
#include <map>
#include <algorithm>

using namespace std;
const int INF = 1e9;
int f[5050][5050];
int b[5050],a[5050];
#define LL long long
int calc(int L,int R)
{
	if(L>R) return 0;
	if(L==R) return f[L][R] = a[1];
	if(f[L][R]!=-1) return f[L][R];
	f[L][R] = a[R-L+1];
	int i = L,j = R;
	LL sum = 0;
	LL  sum1 = 0;
	for(;i<=R;i++)
	{
		sum1+=b[i];
		while(j>i&&sum<sum1) { sum+=b[j];j--;}
		if(j<i) break;
		if(sum!=sum1) continue;
		f[L][R] = min(f[L][R],calc(i+1,j)+a[i-L+1]+a[R-j]);
	}
	return f[L][R];
}
int main() {
	int n;
	while(~scanf("%d",&n))
	{
		if(!n) break;
		memset(f,-1,sizeof(f));
		for(int i=1;i<=n;i++) scanf("%d",&b[i]);
		for(int i=1;i<=n;i++) scanf("%d",&a[i]);
		printf("%d\n",calc(1,n));
	}
}

Compiler output:
main.c:2:10: fatal error: iostream: No such file or directory
    2 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>

int main(void){
	int a,b,sum,keta,count,answer[200]={'0'};
	
	for(count=0;count<200;count++){
		keta=1;
		scanf("%d %d",&a,&b);
		sum=a+b;
		if(sum/10!=0){
			keta++;
			if(sum/100!=0){
				keta++;
				if(sum/1000!=0){
					keta++;
					if(sum/10000!=0){
						keta++;
						if(sum/100000!=0){
							keta++;
							if(sum/1000000!=0){
								keta++;
							}
						}
					}
				}
			}
		}
		answer[count]=keta;
	}
	for(sum=0;sum<count;sum++){
		printf("%d\n",answer[sum]);
	}1 1
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:32:11: error: expected ';' before numeric constant
   32 |         }1 1
      |           ^~
      |           ;
Language: C

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

int main(){

	int a = 0;
	int b = 0;
	int c = 0;
	int e = 0;
	int r = 0;

	srand((unsigned)time(NULL));

	r = rand() % 200;

	for (int i = 0; i < r; i++)
	{
		a = rand() % 1000000;
		b = rand() % 1000000;

		c = a + b;

		for (e = 0; c != 0; e++)
		{
			c /= 10;
		}

		printf("%d\n", e);
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:9: error: implicit declaration of function 'srand' [-Wimplicit-function-declaration]
   13 |         srand((unsigned)time(NULL));
      |         ^~~~~
main.c:15:13: error: implicit declaration of function 'rand' [-Wimplicit-function-declaration]
   15 |         r = rand() % 200;
      |             ^~~~
Language: C

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

int main(){

	int a = 0;
	int b = 0;
	int c = 0;
	int e = 0;

	for (int i = 0; i < 200; i++)
	{
		scanf_s("%d", &a);
		scanf_s("%d", &b);

		if (a > 1000000)
		{
			a = 999999;
		}
		if (b > 1000000)
		{
			b = 999999;
		}

		c = a + b;

		for (e = 0; c != 0; e++)
		{
			c /= 10;
		}

		printf("%d\n", e);
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:17: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
   13 |                 scanf_s("%d", &a);
      |                 ^~~~~~~
      |                 scanf
Language: C

#include <stdio.h>

int main(){
int a,b,c,d.i;
while () {scanf("%d %d\n",&a,&b);
c=a+b;
d=1
if (c=0) {printf("1\n");}
else {for (i=1;i<=7;i++) {
if (c<d*10 && c>=d) {printf("%d\n",i);}
d*=10;
}
}
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    4 | int a,b,c,d.i;
      |            ^
main.c:5:8: error: expected expression before ')' token
    5 | while () {scanf("%d %d\n",&a,&b);
      |        ^
main.c:7:1: error: 'd' undeclared (first use in this function)
    7 | d=1
      | ^
main.c:7:1: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:4: error: expected ';' before 'if'
    7 | d=1
      |    ^
      |    ;
    8 | if (c=0) {printf("1\n");}
      | ~~
Language: C

#include <stdio.h>

int main(){
int a,b,c,d.i;
while () {scanf("%d %d\n",&a,&b);
c=a+b;
d=1;
if (c=0) {printf("1\n");}
else {for (i=1;i<=7;i++) {
if (c<d*10 && c>=d) {printf("%d\n",i);}
d*=10;
}
}
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    4 | int a,b,c,d.i;
      |            ^
main.c:5:8: error: expected expression before ')' token
    5 | while () {scanf("%d %d\n",&a,&b);
      |        ^
main.c:7:1: error: 'd' undeclared (first use in this function)
    7 | d=1;
      | ^
main.c:7:1: note: each undeclared identifier is reported only once for each function it appears in
main.c:9:12: error: 'i' undeclared (first use in this function)
    9 | else {for (i=1;i<=7;i++) {
      |            ^
Language: C

#include <stdio.h>

int main(){
    int a,b,c,d,i;
    while (scanf("%d %d\n",&a,&b); !=EOF){
        c=a+b;
        d=1;
        if (c==0) {printf("1\n");}
        else {for (i=1;i<=7;i++) {
            if (c<d*10 && c>=d) {printf("%d\n",i);}
            d*=10;
        }
        }
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:34: error: expected ')' before ';' token
    5 |     while (scanf("%d %d\n",&a,&b); !=EOF){
      |           ~                      ^
      |                                  )
Language: C

#include<stdio.h>

int main(){
        int a,b;
        int ab;
        int s;
        int count=0;

        scanf("%d",&a);
        scanf("%d",&b);
        //puts("あいうえお");
        ab = a + b;

        for(s = 1;1 ; s*=10){
                //printf("%d\n", ab/s);
                //getchar();
                if(ab / s > 0){
                        count ++;
                }else{
                        break;
                }
        }

        printf("%d",count);

        return 0;

Compiler output:
main.c: In function 'main':
main.c:26:9: error: expected declaration or statement at end of input
   26 |         return 0;
      |         ^~~~~~
Language: C

include<stdio.h>

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

        while(scanf("%d",&a) != EOF){
                int count = 0;
                int ab = 0;
                scanf("%d",&b);

                ab = a + b;

                for(s = 1;1 ; s*=10){
                        if(ab / s > 0){
                                count ++;
                        }else{
                                break;
                        }
                }

                printf("%d\n",count);   
        }               

        return 0;
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C

#include<stdio.h>
#include<string.h>
int main(){
  int a,b,total=1,i=10,j,ab;
  whlie(1){
    scanf("%d %d",&a,&b);
    ab=a+b;
    for(j=0;j<6;j++){
      if(ab/i>=1){
	total++;
      }
      i=10*i;
    }
    printf("%d\n",total);
  }  
  return(0);
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'whlie' [-Wimplicit-function-declaration]
    5 |   whlie(1){
      |   ^~~~~
main.c:5:11: error: expected ';' before '{' token
    5 |   whlie(1){
      |           ^
      |           ;
Language: C

#include<stdio.h>
#include<string.h>
int main(){
  int a,b,total=1,i=10,j,ab;
  whlie(1){
    scanf("%d",&a);
    scanf("%d",&b);
    ab=a+b;
    for(j=0;j<6;j++){
      if(ab/i>=1){
	total++;
      }
      i=10*i;
    }
    printf("%d\n",total);
  }  
  return(0);
}
  

Compiler output:
main.c: In function 'main':
main.c:5:3: error: implicit declaration of function 'whlie' [-Wimplicit-function-declaration]
    5 |   whlie(1){
      |   ^~~~~
main.c:5:11: error: expected ';' before '{' token
    5 |   whlie(1){
      |           ^
      |           ;
Language: C

#include<stdio.h>
#include<string.h>
int main(){
	char a[1000001];
	char b[1000001];
	char c;
	int len;
	scanf("%s %s",a,b);
	c=a+b;
	len = strlen(c);
	printf("%d\n",len);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:12: error: invalid operands to binary + (have 'char *' and 'char *')
    9 |         c=a+b;
      |           ~^
      |           ||
      |           |char *
      |           char *
main.c:10:22: error: passing argument 1 of 'strlen' makes pointer from integer without a cast [-Wint-conversion]
   10 |         len = strlen(c);
      |                      ^
      |                      |
      |                      char
In file included from main.c:2:
/usr/include/string.h:407:35: note: expected 'const char *' but argument is of type 'char'
  407 | extern size_t strlen (const char *__s)
      |                       ~~~~~~~~~~~~^~~
Language: C

#include<stdio.h>
int main(void){
Int i,a,b,c;
scanf("%d %d",&a,&b);
c=a+b;
for(i=0;c<10;i++){
c=c/10;
}
printf("%d\n",i);
return(0);
}

Compiler output:
main.c: In function 'main':
main.c:3:1: error: unknown type name 'Int'; did you mean 'int'?
    3 | Int i,a,b,c;
      | ^~~
      | int
Language: C

#include<stdio.h>
int main(void){
int i,a,b,c;
while(0){
scanf("%d %d",&a,&b);
If(a==EOF)
break;
c=a+b;
for(i=1;c>10;i++){
c=c/10;
}
printf("%d\n",i);
}
return(0);
}

Compiler output:
main.c: In function 'main':
main.c:6:1: error: implicit declaration of function 'If' [-Wimplicit-function-declaration]
    6 | If(a==EOF)
      | ^~
main.c:6:11: error: expected ';' before 'break'
    6 | If(a==EOF)
      |           ^
      |           ;
    7 | break;
      | ~~~~~
Language: C

#include<stdio.h>
int main(void){
int i,a,b,c;
while(0){
scanf("%d %d",&a,&b);
If(a==EOF)
return(0);
c=a+b;
for(i=1;c>10;i++){
c=c/10;
}
printf("%d\n",i);
}
return(0);
}

Compiler output:
main.c: In function 'main':
main.c:6:1: error: implicit declaration of function 'If' [-Wimplicit-function-declaration]
    6 | If(a==EOF)
      | ^~
main.c:6:11: error: expected ';' before 'return'
    6 | If(a==EOF)
      |           ^
      |           ;
    7 | return(0);
      | ~~~~~~
Language: C

#include<stdio.h>
int main(void){
int i,a,b,c;
while(0){
scanf("%d %d",&a,&b);
If(a==EOF){
break;
}
c=a+b;
for(i=1;c>10;i++){
c=c/10;
}
printf("%d\n",i);
}
return(0);
}

Compiler output:
main.c: In function 'main':
main.c:6:1: error: implicit declaration of function 'If' [-Wimplicit-function-declaration]
    6 | If(a==EOF){
      | ^~
main.c:6:11: error: expected ';' before '{' token
    6 | If(a==EOF){
      |           ^
      |           ;
Language: C

#include <stdio.h>

int main(void){
    int a,b,n,i;
    printf("\n")
    while(scanf("%d",&a) != EOF){
        scanf("%d",&b);
        n = a + b;
        i = 0;
        while (n != 0){
            i = i + 1;
            n = n/10;
        }
        printf("%d\n",i);
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:17: error: expected ';' before 'while'
    5 |     printf("\n")
      |                 ^
      |                 ;
    6 |     while(scanf("%d",&a) != EOF){
      |     ~~~~~
Language: C

#include<stdio.h>
int main(){
  int num1,num2,num,sum;
  nun=1;
  scanf("%d%d",&num1,&num2);
  sum=num1+num2;
  while(sum>9){
    sum=sum/10;
    num++;
  }
  printf("%d\n",num);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:3: error: 'nun' undeclared (first use in this function); did you mean 'num'?
    4 |   nun=1;
      |   ^~~
      |   num
main.c:4:3: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(void){
	int a,c,t;
	while(scanf("%d %d",&a,&???) != EOF){	
		c=a+???;
		for(t=0;c!=0;t++){
			c = c/10;
		}
		printf("%d\n",t);
	}
	return;
}

Compiler output:
main.c: In function 'main':
main.c:5:34: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
    5 |         while(scanf("%d %d",&a,&???) != EOF){
main.c:5:33: error: expected expression before '?' token
    5 |         while(scanf("%d %d",&a,&???) != EOF){
      |                                 ^
main.c:6:21: error: expected expression before '?' token
    6 |                 c=a+???;
      |                     ^
main.c:12:9: error: 'return' with no value, in function returning non-void [-Wreturn-mismatch]
   12 |         return;
      |         ^~~~~~
main.c:3:5: note: declared here
    3 | int main(void){
      |     ^~~~
Language: C

int main(int argc,const char *argv[]){
    int a,b,keta,c,i;
    while(EOF){
        keta=0;
        scanf("%d %d",&a,&b);
        a=a+b;
        for(i=0;i<=1000000;i=i*10){
            a=a/10;
            if(a==0){
                keta++;
                break;
            }
            keta++;
            }
        printf("%d\n",keta);
        }
    return 0;
    }

Compiler output:
main.c: In function 'main':
main.c:3:11: error: 'EOF' undeclared (first use in this function)
    3 |     while(EOF){
      |           ^~~
main.c:1:1: note: 'EOF' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
  +++ |+#include <stdio.h>
    1 | int main(int argc,const char *argv[]){
main.c:3:11: note: each undeclared identifier is reported only once for each function it appears in
    3 |     while(EOF){
      |           ^~~
main.c:5:9: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 |         scanf("%d %d",&a,&b);
      |         ^~~~~
main.c:5:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
main.c:5:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:15:9: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   15 |         printf("%d\n",keta);
      |         ^~~~~~
main.c:15:9: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:15:9: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:15:9: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

include<stdio.h>
int main()
{
  int a[10][2];
  int i,sum,j,k=0;
  for(k=0;k<3;k++){
    for(i=0;i<2;i++){
    scanf("%d",&a[k][i]);
  }
  sum=a[k][0]+a[k][1];
  j=0;
  while(sum>=1){
    sum=sum/10;
    j=j+1;
  }
  printf("%d\n",j);
  }
  return 0;
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C

include<stdio.h>
int main()
{
  int a[10][2],m[3];
  int i,sum,j,k=0;
  for(k=0;k<3;k++){
    for(i=0;i<2;i++){
    scanf("%d",&a[k][i]);
  }
  sum=a[k][0]+a[k][1];
  j=0;
  while(sum>=1){
    sum=sum/10;
    j=j+1;
  }
  m[k]=j;
  }
  for(i=0;i<3;i++){
  printf("%d\n",m[i]);
  }
  return 0;
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C

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

int main(void){
  int a, b, ans;
  char s[20]="";
  int cnt=0;

  while(strcmp(s, "EOF") != 0){
    scanf("%d %d", &a, &b);
    a_lng=lng(a);
    b_lng=lng(b);
    ans=a+b;
    while(ans>0){
      cnt++;
      ans=ans/10;
    }
    printf("\n");
    printf("%d\n",  lng(ans));    scanf("%s", s);
    cnt=0;
  }
}

Compiler output:
main.c: In function 'main':
main.c:11:5: error: 'a_lng' undeclared (first use in this function)
   11 |     a_lng=lng(a);
      |     ^~~~~
main.c:11:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:11:11: error: implicit declaration of function 'lng' [-Wimplicit-function-declaration]
   11 |     a_lng=lng(a);
      |           ^~~
main.c:12:5: error: 'b_lng' undeclared (first use in this function)
   12 |     b_lng=lng(b);
      |     ^~~~~
Language: C

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

int main(void){
  int a, b, ans;
  char s[20]="";
  int cnt=0;

  while(strcmp(s, "EOF") != 0){
    scanf("%d %d", &a, &b);
    ans=a+b;
    while(ans>0){
      cnt++;
      ans=ans/10;
    }
    printf("\n");
    printf("%d\n",  lng(ans));    scanf("%s", s);
    cnt=0;
  }
}

Compiler output:
main.c: In function 'main':
main.c:17:21: error: implicit declaration of function 'lng' [-Wimplicit-function-declaration]
   17 |     printf("%d\n",  lng(ans));    scanf("%s", s);
      |                     ^~~
Language: C

include<stdio.h>
int main()
{
  int a[200][2];
  int i,sum,j,k;
  for(;;){
    k=0;
    k++;
    for(i=0;i<2;i++){
    scanf("%d",&a[k][i]);
  }
  sum=a[k][0]+a[k][1];
  j=0;
  while(sum>=1){
    sum=sum/10;
    j=j+1;
  }
  printf("%d\n",j);
  }
  return 0;
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
Language: C

#include <stdio.h>

int main(void){
  int a, b, ans;
  int cnt;

  while((scanf("%d %d", &a, &b))!=EOF){
    cnt=0;
    ans=a+b;
    while(x>0){
      cnt++;
      x=x/10;
    }
    printf("%d\n",  lng(ans));
  }
}

Compiler output:
main.c: In function 'main':
main.c:10:11: error: 'x' undeclared (first use in this function)
   10 |     while(x>0){
      |           ^
main.c:10:11: note: each undeclared identifier is reported only once for each function it appears in
main.c:14:21: error: implicit declaration of function 'lng' [-Wimplicit-function-declaration]
   14 |     printf("%d\n",  lng(ans));
      |                     ^~~
Language: C

#include <stdio.h>

int main(void){
  int a, b, ans;
  int cnt;

  while((scanf("%d %d", &a, &b))!=EOF){
    cnt=0;
    ans=a+b;
    while(x>0){
      cnt++;
      ans=ans/10;
    }
    printf("%d\n",  lng(ans));
  }
}

Compiler output:
main.c: In function 'main':
main.c:10:11: error: 'x' undeclared (first use in this function)
   10 |     while(x>0){
      |           ^
main.c:10:11: note: each undeclared identifier is reported only once for each function it appears in
main.c:14:21: error: implicit declaration of function 'lng' [-Wimplicit-function-declaration]
   14 |     printf("%d\n",  lng(ans));
      |                     ^~~
Language: C

#include <stdio.h>

int main(void){
  int a, b, ans;
  int cnt;

  while((scanf("%d %d", &a, &b))!=EOF){
    cnt=0;
    ans=a+b;
    while(ans>0){
      cnt++;
      ans=ans/10;
    }
    printf("%d\n",  lng(ans));
  }
}

Compiler output:
main.c: In function 'main':
main.c:14:21: error: implicit declaration of function 'lng' [-Wimplicit-function-declaration]
   14 |     printf("%d\n",  lng(ans));
      |                     ^~~
Language: C

#include <stdio.h>

int digit(int SUM){
  int i;
  for(i = 0; SUM >= 10; i++){
    SUM %= 10; 
    }
    return i;
    }


int main(void) {
  int a, b, sum, d
  scanf("%d %d", a, b);
  sum = a + b;
  
  d = digit(sum);
  
  printf("%d\n", d);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:14:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
   14 |   scanf("%d %d", a, b);
      |   ^~~~~
main.c:17:3: error: 'd' undeclared (first use in this function)
   17 |   d = digit(sum);
      |   ^
main.c:17:3: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(void){
  int a, b, sum, i;
  scanf("%d %d", a, b);
  sum = a + b;
  
  for(i = 0; SUM >= 10; i++){
    SUM %= 10; 
    }
  
  printf("%d\n", i);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:14: error: 'SUM' undeclared (first use in this function)
    8 |   for(i = 0; SUM >= 10; i++){
      |              ^~~
main.c:8:14: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(void){
  int a, b, sum, i;
  scanf("%d %d", &a, &b);
  sum = a + b;
  i = 1;
  
  for(i = 1; sum >= 10; i++){
    sum %= 10; 
    j += 1;
    }
  
  printf("%d\n", j);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:5: error: 'j' undeclared (first use in this function)
   11 |     j += 1;
      |     ^
main.c:11:5: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int calc_digit(int c)
{
    int d;
    
    d = 0;
    do{
        c /= 10;
        d++;
    } while(c != 0);
    return d;
}

int main(){
    int i;
    int a, b;
    int ret;
    int d;

    for(i = 0; i < 200; i++){
        ret = scanf("%d %d", &a, &b);
        if(ret != EOF){
            printf("%d\n", calcdigit(a + b));
        }else{
            break;
        }
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:24:28: error: implicit declaration of function 'calcdigit'; did you mean 'calc_digit'? [-Wimplicit-function-declaration]
   24 |             printf("%d\n", calcdigit(a + b));
      |                            ^~~~~~~~~
      |                            calc_digit
Language: C

#include <stdio.h>

int calc_digit(int c)
{
    int d;
    
    d = 0;
    do{
        c /= 10;
        d++;
    } while(c != 0);
    return d;
}

int main(){
    int i;
    int a, b;
    int ret;

    for(i = 0; i < 200; i++){
        ret = scanf("%d %d", &a, &b);
        if(ret != EOF){
            printf("%d\n", calcdigit(a + b));
        }else{
            break;
        }
    }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:23:28: error: implicit declaration of function 'calcdigit'; did you mean 'calc_digit'? [-Wimplicit-function-declaration]
   23 |             printf("%d\n", calcdigit(a + b));
      |                            ^~~~~~~~~
      |                            calc_digit
Language: C

#include <stdio.h>

main(void)
{
	do{
		int a,b,c=0,d,e;
		
		scanf("%d %d",&a,&b);
		
		d=a+b;
		
		while(d!=0){
			d/=10;
			c++;
		}
		
		printf("%d\n",c);
	}while(++e<201)
	return 0;
}

Compiler output:
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(void)
      | ^~~~
main.c: In function 'main':
main.c:18:18: error: 'e' undeclared (first use in this function)
   18 |         }while(++e<201)
      |                  ^
main.c:18:18: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:24: error: expected ';' before 'return'
   18 |         }while(++e<201)
      |                        ^
      |                        ;
   19 |         return 0;
      |         ~~~~~~
Language: C

#include<stdio.h>

int main()
{

    int a,b,c;
    scanf("%d %d",&a,&b);
    c=a+b;
    
    int keta=1;
    while(1)
    {
      if((c/10)==0)break;
      else
      {
        keta++;
        c/=10;
      }
    }
    
    printf("%d",keta);

  }
  return 0;
}

Compiler output:
main.c:24:3: error: expected identifier or '(' before 'return'
   24 |   return 0;
      |   ^~~~~~
main.c:25:1: error: expected identifier or '(' before '}' token
   25 | }
      | ^
Language: C

#include<stdio.h>

int main()
{
  unsinged int a,b;
  int keta;
  int sum;

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

  for(sum=a+b,keta=1;sum/10!=0;sum/=10)keta++;

  printf("%d\n",keta);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: 'unsinged' undeclared (first use in this function)
    5 |   unsinged int a,b;
      |   ^~~~~~~~
main.c:5:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:5:11: error: expected ';' before 'int'
    5 |   unsinged int a,b;
      |           ^~~~
      |           ;
main.c:9:18: error: 'a' undeclared (first use in this function)
    9 |   scanf("%d %d",&a,&b);
      |                  ^
main.c:9:21: error: 'b' undeclared (first use in this function)
    9 |   scanf("%d %d",&a,&b);
      |                     ^
Language: C

#include<stdio.h>

int main()
{
  unsignedint a,b;
  int keta;
  int sum;

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

  for(sum=a+b,keta=1;sum/10!=0;sum/=10)keta++;

  printf("%d\n",keta);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: unknown type name 'unsignedint'; did you mean 'unsigned int'?
    5 |   unsignedint a,b;
      |   ^~~~~~~~~~~
      |   unsigned int
Language: C

#include<stdio.h>

int main()
{
  unsignedint a,b;
  int keta;
  int sum;

  scanf("%ud %ud",&a,&b);

  for(sum=a+b,keta=1;sum/10!=0;sum/=10)keta++;

  printf("%d\n",keta);

  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:3: error: unknown type name 'unsignedint'; did you mean 'unsigned int'?
    5 |   unsignedint a,b;
      |   ^~~~~~~~~~~
      |   unsigned int
Language: C

#incldue<stdio.h>
#include<math.h>
int main(){
int a,b;
while(scanf("%d %d",a,b)!=EOF){
a+=b;
printf("%d\n",(int)log10(a));
}
return 0;
}

Compiler output:
main.c:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue<stdio.h>
      |  ^~~~~~~
      |  include
main.c: In function 'main':
main.c:5:7: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    5 | while(scanf("%d %d",a,b)!=EOF){
      |       ^~~~~
main.c:3:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
    2 | #include<math.h>
  +++ |+#include <stdio.h>
    3 | int main(){
main.c:5:7: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    5 | while(scanf("%d %d",a,b)!=EOF){
      |       ^~~~~
main.c:5:7: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:5:27: error: 'EOF' undeclared (first use in this function)
    5 | while(scanf("%d %d",a,b)!=EOF){
      |                           ^~~
main.c:5:27: note: 'EOF' is defined in header '<stdio.h>'; this is probably fixable by adding '#include <stdio.h>'
main.c:5:27: note: each undeclared identifier is reported only once for each function it appears in
main.c:7:1: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    7 | printf("%d\n",(int)log10(a));
      | ^~~~~~
main.c:7:1: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:1: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:7:1: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <stdio.h>

int main(void) {
	
	int a,b;
	int total;
	int digit = 0;
	
	while(true) {
		scanf("%d%d",&a, &b);
		total = a + b;
	
		while( total != 0){
			total /= 10;
			digit++;
		}
	
		printf("%d", digit);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:15: error: 'true' undeclared (first use in this function)
    9 |         while(true) {
      |               ^~~~
main.c:2:1: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include <stdio.h>
  +++ |+#include <stdbool.h>
    2 | 
main.c:9:15: note: each undeclared identifier is reported only once for each function it appears in
    9 |         while(true) {
      |               ^~~~
Language: C

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

int main(void) {
	int a, b;
	char ch[16];

	while (scanf("%d %d"&a,&b) != EOF) {
		sprintf(ch, "%d", a + b);
		printf("%d", strlen(ch));
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:29: error: invalid operands to binary & (have 'char *' and 'int')
    8 |         while (scanf("%d %d"&a,&b) != EOF) {
      |                      ~~~~~~~^
      |                      |
      |                      char *
Language: C

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

int main(void) {
	int a, b;
	char ch(16);

	while (scanf("%d %d",&a,&b) != EOF) {
		sprintf(ch, "%d", a + b);
		printf("%d\n", strlen(ch));
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:17: error: expected declaration specifiers or '...' before numeric constant
    6 |         char ch(16);
      |                 ^~
main.c:9:25: error: 'ch' undeclared (first use in this function)
    9 |                 sprintf(ch, "%d", a + b);
      |                         ^~
main.c:9:25: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <iostream>
using namespace std;

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

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

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

int main()
{
	int a, b;

	while (scanf("%d %d", a, b));
	{
		printf("%d\n", static_cast<int>(log10(a + b)) + 1);
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:32: error: 'static_cast' undeclared (first use in this function)
   10 |                 printf("%d\n", static_cast<int>(log10(a + b)) + 1);
      |                                ^~~~~~~~~~~
main.c:10:32: note: each undeclared identifier is reported only once for each function it appears in
main.c:10:44: error: expected expression before 'int'
   10 |                 printf("%d\n", static_cast<int>(log10(a + b)) + 1);
      |                                            ^~~
Language: C

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

Compiler output:
main.c: In function 'main':
main.c:5:23: error: expected expression before '%' token
    5 |   while(scanf("%d %d",%a,&b); != -1){
      |                       ^
main.c:5:29: error: expected ')' before ';' token
    5 |   while(scanf("%d %d",%a,&b); != -1){
      |        ~                    ^
      |                             )
Language: C

#include<stdio.h>

int main(void){
int a[3], b[3], c[3], i,j;

for(i=0;i<3;i++){
scanf("%d %d", &a[i], &b[i]);
c[i]=a[i]+b[i];
}
for(j=0;j<3;j++)
for(i=0;i<20;i++){
c[j]=c[j]/10;
if(c[j]<0){c[j]=i;break;}
}
for(i=0;i<3;i++)
printf("%d\n", strlen(str[i]));
return 0;}

Compiler output:
main.c: In function 'main':
main.c:16:16: error: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
   16 | printf("%d\n", strlen(str[i]));
      |                ^~~~~~
main.c:2:1: note: include '<string.h>' or provide a declaration of 'strlen'
    1 | #include<stdio.h>
  +++ |+#include <string.h>
    2 | 
main.c:16:16: warning: incompatible implicit declaration of built-in function 'strlen' [-Wbuiltin-declaration-mismatch]
   16 | printf("%d\n", strlen(str[i]));
      |                ^~~~~~
main.c:16:16: note: include '<string.h>' or provide a declaration of 'strlen'
main.c:16:23: error: 'str' undeclared (first use in this function)
   16 | printf("%d\n", strlen(str[i]));
      |                       ^~~
main.c:16:23: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
int main(){
int a,b;
int i=0;
for(i=0;i<200,i++){
scanf("%d %d",&a,&b);
printf("%d\n",a+b/10);
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:18: error: expected ';' before ')' token
    5 | for(i=0;i<200,i++){
      |                  ^
      |                  ;
Language: C

#include<stdio.h>
int main(){
int a,b;
int i;
for(i=0;i<200;i++){
if(scanf("%d %d",&a,&b)==EOF){
break;
}else{
c=(a+b)/10
printf("%d\n",c);
}
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:1: error: 'c' undeclared (first use in this function)
    9 | c=(a+b)/10
      | ^
main.c:9:1: note: each undeclared identifier is reported only once for each function it appears in
main.c:9:11: error: expected ';' before 'printf'
    9 | c=(a+b)/10
      |           ^
      |           ;
   10 | printf("%d\n",c);
      | ~~~~~~
Language: C

#include<stdio.h>
int main(){
int a,b;
int i;
for(i=0;i<200;i++){
if(scanf("%d %d",&a,&b)==EOF){
break;
}else{
c=(a+b)/10;
printf("%d\n",c);
}
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:1: error: 'c' undeclared (first use in this function)
    9 | c=(a+b)/10;
      | ^
main.c:9:1: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(){
	int a,b,count;
	while(scanf("%d %d", &a, &b) != EOF){
		a = a + b;
		count = 0
	
		while(a > 0){
			a = a / 10;
			count++;
		}
	
		printf("%d\n", count);
	}
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:26: error: expected ';' before 'while'
    7 |                 count = 0
      |                          ^
      |                          ;
    8 | 
    9 |                 while(a > 0){
      |                 ~~~~~
Language: C

#include <stdio.h>

int main(void)
{

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

for(i=1;a+b=!0;i++){
    sum=(a+b)/10;

    }
    printf("%d",i);
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:10:12: error: lvalue required as left operand of assignment
   10 | for(i=1;a+b=!0;i++){
      |            ^
main.c:11:5: error: 'sum' undeclared (first use in this function)
   11 |     sum=(a+b)/10;
      |     ^~~
main.c:11:5: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int main(void)
{
  int a,b,sum;
  scanf("%d",&a);
  scanf("%d",&b);
  sum=a+b;
  sum=(int)log10(c)+1;

  printf("%d",sum);
  
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:9:12: error: implicit declaration of function 'log10' [-Wimplicit-function-declaration]
    9 |   sum=(int)log10(c)+1;
      |            ^~~~~
main.c:2:1: note: include '<math.h>' or provide a declaration of 'log10'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
main.c:9:12: warning: incompatible implicit declaration of built-in function 'log10' [-Wbuiltin-declaration-mismatch]
    9 |   sum=(int)log10(c)+1;
      |            ^~~~~
main.c:9:12: note: include '<math.h>' or provide a declaration of 'log10'
main.c:9:18: error: 'c' undeclared (first use in this function)
    9 |   sum=(int)log10(c)+1;
      |                  ^
main.c:9:18: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>

int a,b,c,ans;
scanf("%d",&a);
scanf("%d",&b);
c=a+b;

ans=(int)log10(c)+1;
printf("%d",ans);
}

Compiler output:
main.c:4:7: error: expected declaration specifiers or '...' before string constant
    4 | scanf("%d",&a);
      |       ^~~~
main.c:4:12: error: expected declaration specifiers or '...' before '&' token
    4 | scanf("%d",&a);
      |            ^
main.c:5:7: error: expected declaration specifiers or '...' before string constant
    5 | scanf("%d",&b);
      |       ^~~~
main.c:5:12: error: expected declaration specifiers or '...' before '&' token
    5 | scanf("%d",&b);
      |            ^
main.c:6:1: warning: data definition has no type or storage class
    6 | c=a+b;
      | ^
main.c:6:1: error: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
main.c:6:3: error: initializer element is not constant
    6 | c=a+b;
      |   ^
main.c:8:1: warning: data definition has no type or storage class
    8 | ans=(int)log10(c)+1;
      | ^~~
main.c:8:1: error: type defaults to 'int' in declaration of 'ans' [-Wimplicit-int]
main.c:8:10: error: implicit declaration of function 'log10' [-Wimplicit-function-declaration]
    8 | ans=(int)log10(c)+1;
      |          ^~~~~
main.c:2:1: note: include '<math.h>' or provide a declaration of 'log10'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
main.c:8:10: warning: incompatible implicit declaration of built-in function 'log10' [-Wbuiltin-declaration-mismatch]
    8 | ans=(int)log10(c)+1;
      |          ^~~~~
main.c:8:10: note: include '<math.h>' or provide a declaration of 'log10'
main.c:8:5: error: initializer element is not constant
    8 | ans=(int)log10(c)+1;
      |     ^
main.c:9:8: error: expected declaration specifiers or '...' before string constant
    9 | printf("%d",ans);
      |        ^~~~
main.c:9:13: error: expected declaration specifiers or '...' before 'ans'
    9 | printf("%d",ans);
      |             ^~~
main.c:10:1: error: expected identifier or '(' before '}' token
   10 | }
      | ^
Language: C

#include <stdio.h>
#include <math.h>
main(){
long a,b,c,ans;
scanf("%d",&a);
scanf("%d",&b);
c=a+b;

ans=(long)log10(c)+1;
printf("%d",ans);
}#include <stdio.h>
#include <math.h>
main(){
long a,b,c,ans;
scanf("%d",&a);
scanf("%d",&b);
c=a+b;

ans=(long)log10(c)+1;
printf("%d",ans);
return 0;
}

Compiler output:
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main(){
      | ^~~~
main.c:11:2: error: stray '#' in program
   11 | }#include <stdio.h>
      |  ^
main.c:11:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
   11 | }#include <stdio.h>
      |           ^
Language: C


#include <stdio.h> 


  


int main(void) 


{ 


  /* ?????°?????£?¨? */ 


  int number1,number2; 


  int digit = 0; 


  


  /* ??°????????\??? */ 

c=number1+number2;



  scanf("%d", &number); 


  


  /* ?????°????¨???? */ 


  while(c!=0){ 


    c = c / 10; 


    ++digit; 


  } 


  


  /* ??°???????????°?????¨??? */ 


  printf(" %d\n", digit); 


  


  return 0; 


} 

Compiler output:
main.c: In function 'main':
main.c:28:1: error: 'c' undeclared (first use in this function)
   28 | c=number1+number2;
      | ^
main.c:28:1: note: each undeclared identifier is reported only once for each function it appears in
main.c:32:16: error: 'number' undeclared (first use in this function); did you mean 'number2'?
   32 |   scanf("%d", &number);
      |                ^~~~~~
      |                number2
Language: C

#include <stdio.h>
#include <conio.h>

int main(void)
{	
	int count = 0;
	int i;
	long num;
	char str[20],str1[200][15], str2[200][15];
	char *p;
	
	for(i=0; i<200; i++){
		scanf("%s %s", &str1[i], &str2[i]);
		//gets(str1[i]);
		if( *str1[i]=='\0' || *str1[i]=='\n') break;	
		
		num = atoi(str1[i])+atoi(str2[i]);
		itoa(num, str, 10);
		
		//printf("%ld\n", num);
		//printf("str %s\n", str);
		
		count = 0;
		p = str;
		while(*p!='\0'){
			p++;
			count++;
		}
		printf("%d\n",count);
	}

	return 0;
}

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

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

int main(void)
{	
	int count = 0;
	int i;
	long num;
	char str[20],str1[200][15], str2[200][15];
	char *p;
	
	for(i=0; i<200; i++){
		scanf("%s %s", &str1[i], &str2[i]);
		//gets(str1[i]);
		if( *str1[i]=='\0' || *str1[i]=='\n') break;	
		
		num = atoi(str1[i])+atoi(str2[i]);
		itoa(num, str, 10);
		
		//printf("%ld\n", num);
		//printf("str %s\n", str);
		
		count = 0;
		p = str;
		while(*p!='\0'){
			p++;
			count++;
		}
		printf("%d\n",count);
	}

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:18:17: error: implicit declaration of function 'itoa' [-Wimplicit-function-declaration]
   18 |                 itoa(num, str, 10);
      |                 ^~~~