C/string.h/memcmp

 
//Declaration:  int memcmp(const void *buf1, const void *buf2,  size_t count); 
//Return:       returns an integer as follows: 
                  < 0  :  buf1 is less than buf2 
                  0    :  buf1 is equal to buf2 
                  > 0 >:  buf1 is greater than buf2 
  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  int main(int argc, char *argv[])
  {
    int outcome, len, l1, l2;
    char *str = "asdf";
    char *str1 = "asdfasdf";
    /* find the length of shortest string */
    l1 = strlen(str);
    l2 = strlen(str1);
    len = l1 < l2 ? l1:l2;
    outcome = memcmp(str, str1, len);
    if(!outcome)
        printf("Equal");
    else if(outcome<0)
        printf("First less than second.");
    else
        printf("First greater than second.");
    return 0;
  }
         
/*
Equal*/