C库函数 memcmp()

#include <stdio.h>

#include <string.h>



int main () {

   char str1[15];

   char str2[15];

   int ret;



   memcpy(str1, "abcdef", 6);

   memcpy(str2, "ABCDEF", 6);



   ret = memcmp(str1, str2, 5);



   if(ret > 0) {

      printf("str2 is less than str1");

   } else if(ret < 0) {

      printf("str1 is less than str2");

   } else {

      printf("str1 is equal to str2");

   }



   return(0);

}