C语言 strcoll()函数

int strcoll(const char *str1, const char *str2)

#include <stdio.h>
#include <string.h>

int main () {
   char str1[20];
   char str2[20];
   int result;

   strcpy(str1, "HELLO");
   strcpy(str2, "hello world!");

   result = strcoll(str1, str2);

   if(result > 0) { 
      printf("ASCII value of first unmatched character of str1 is greater than str2");
   } else if(result < 0) {
      printf("ASCII value of first unmatched character of str1 is less than str2");
   } else {
      printf("Both the strings str1 and str2 are equal");
   }

   return 0;
}

ASCII value of first unmatched character of str1 is less than str2