Implement Custom strcmp function

Code

#include <stdio.h>
#include <string.h>
int custom_strcmp(const char *a, const char *b) {
    // Your logic here
    int len_A = strlen(a);
    int len_B = strlen(b);
    int i = 0;
    if(len_A < len_B)
    {
        return -100;
    }
    else if(len_A > len_B)
    {
        return 100;
    }
    else 
    {
        while(a[i]!= '\0')
        {
            if((a[i] > (b[i])))
            {
                return a[i] - b[i]; 
            }
            else if((a[i] < (b[i])))
            {
                return b[i] - a[i]; 
            }
            i++;
        }
    }
    return 0;
}

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