tst_strlen.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_strlen (void) {
   char buf [] = "Find the length of this string";
   int len;
   len = strlen (buf);
   printf ("string length is %d\n", len);
}