tst_memcmp.c

KEILC51程序实例和配套硬件目标板,很详细,程序有注释

#include <string.h>
#include <stdio.h>                  /* for printf */
void tst_memcmp (void) {
   static char hexchars [] = "0123456789ABCDEF";
   static char hexchars2 [] = "0123456789abcdef";
   char i;
   i = memcmp (hexchars, hexchars2, 16);
   if (i < 0)
      printf ("hexchars < hexchars2\n");
   else if (i > 0)
      printf ("hexchars > hexchars2\n");
   else
      printf ("hexchars == hexchars2\n");
}