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#include <stdio.h>
 
 
int main(){
 
    int a;
    int b;
    int c;
    int d;
 
    scanf("%d",&a);
 
    scanf("%d",&b);
 
 
    c = a % 100;
    d = b % 100;
 
    c = c /10;
    d = d /10;
 
    printf("%d\n",c);
    printf("%d\n",d);
 
 
 
    if (c < d){
        printf("a < b");
    } else if (c > d) {
        printf("b < a");
    } else {
        printf("a == b");
    };
 
};

prog.c: In function ‘main’:
prog.c:25:12: warning: passing argument 1 of ‘printf’ makes pointer from integer without a cast [-Wint-conversion]
     printf(1)
            ^
In file included from /usr/include/stdio.h:867,
                 from prog.c:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:105:32: note: expected ‘const char * restrict’ but argument is of type ‘int’
 printf (const char *__restrict __fmt, ...)
         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
prog.c:25:5: warning: format not a string literal and no format arguments [-Wformat-security]
     printf(1)
     ^~~~~~
prog.c:25:14: error: expected ‘;’ before ‘if’
     printf(1)
              ^
              ;
prog.c:27:5:
     if (c < d){
     ~~        
prog.c:11:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&a);
     ^~~~~~~~~~~~~~
prog.c:13:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&b);
     ^~~~~~~~~~~~~~

Standard output is empty