String

#include<stdio.h>
int main(void)
{
    char str1[100], str2[100];
    int i, j, flag = 0, len1 = 0, len2 = 0;
    gets(str1);
    gets(str2);
    for(i = 0; str1[i] != '\0'; i++)
        len1++;
    for(i = 0; str2[i] != '\0'; i++)
        len2++;
    if(len1 < len2 )
    {
        printf("[%s] is greater than [%s] because of the length\n", str2, str1);
    }
    else if(len2 < len1)
    {
        printf("[%s] is greater than [%s] because of the length\n", str1, str2);
    }
    else if(len2 == len1)
    {
        for(i = 0; str1[i] != '\0' && str2[i] != '\0'; i++)
        {
            if(str1[i] > str2[i])
            {
                printf("[%s] is greater than [%s] because of index %d [Character: %c]are different\n", str1, str2, i, str1[i]);
                flag = 1;
                break;
            }
            else if(str1[i] < str2[i])
            {
                printf("[%s] is greater than [%s] because of  index %d [character: %c] are different\n", str2, str1, i, str2[i]);
                flag = 1;
                break;
            }
        }
        if(flag == 0)
            printf("[%s] and  [%s] are same\n", str1, str2);
    }
    return 0;
}