tst_strchr.c

这是《Keil Cx51 V7.0单片机高级语言编程与uVision2应用实践》教材各章中列出的全部程序例子。

#include <string.h>
#include <stdio.h>                  /* for printf */
void tst_strchr (void) {
   char * s;
   char buf [] = "This is a test";
   s = strchr (buf, 't');
   if (s != NULL)
      printf ("found a 't' at %s\n", s);
}

   void tst_strpos (void) {
   char text [] = "Search this string for blanks";
   int i;
   i = strpos (text, ' ');
   if (i == -1)
      printf ("No spaces found in %s\n", text);
   else
      printf ("Found a space at offset %d\n", i);
}