Implement Custom strcmp function

Code

#include <stdio.h>
#include <string.h>
int custom_strcmp(const char *a, const char *b) {
    // Your logic here
   
    while(*a && *b)
    {
        if(*a != *b)
        {
           
            return (unsigned char)*a - (unsigned char)*b;
        }
       ++a;
       ++b;
    }
     return ( unsigned char)*a - (unsigned char)*b;
}

int main() {
    char a[101], b[101];
    fgets(a, sizeof(a), stdin);
    fgets(b, sizeof(b), stdin);

    // Remove newline
    int i = 0;
    while (a[i]) {
        if (a[i] == '\n') { a[i] = '\0'; break; }
        i++;
    }
    i = 0;
    while (b[i]) {
        if (b[i] == '\n') { b[i] = '\0'; break; }
        i++;
    }

    printf("%d", custom_strcmp(a, b));
    return 0;
}

Solving Approach