Implement Custom strcmp function

Code

#include <stdio.h>

int custom_strcmp(const char *a, const char *b) {
    // Your logic here
    int count1=0;int i=0;
    int count2=0;int j=0;
    while(a[i]!='\0'){count1++;i++;}
    while(b[j]!='\0'){count2++;j++;}
if(count1==count2){
for(int i=0;i<count1;i++){
    if(a[i]!=b[i])return a[i]-b[i];
}
return 0;
}
else if(count1<count2){
    return -b[count1];
}
else{
    return a[count2];
}
}

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