/**
 * Recursive implementation of strcmp
 * @author gtowell
 * Created: Match 2021
 * **/
#include <stdio.h>

/**
 * Recursive implementation of strcmp.  Strongly assumes that at least one of the passed
 * params is null terminated
 * @param stri -- the first string to be compared
 * @param str2 -- the second string to be compared
 * @return true if the strings are the same length and character-wise identical
 * **/
int strcmprec(char * str1, char * str2) {
    if (*str1 == '\0') {
        return *str1 == *str2;
    }
    if (*str2 == '\0') {
        return 0;
    }
    if (*str1 != *str2)
    {
        return 0;
    }
    return strcmprec(++str1, ++str2);
}

/**
 * Compares the first two command line args for similarity
 * **/
int main(int argc, char const *argv[])
{
    printf("%s %s %s\n", argv[1], argv[2], strcmprec((char *)argv[1], (char *)argv[2]) ? "MATCH" : "DO NOT match");
    return 0;
}