tst_isdigit.c

来自「这是《Keil Cx51 V7.0单片机高级语言编程与uVision2应用实践》」· C语言 代码 · 共 11 行

#include <ctype.h>
#include <stdio.h>               /* for printf */
void tst_isdigit (void) {
  unsigned char i;
  char *p;
    for (i = 0; i < 128; i++) {
      p = (isdigit (i) ? "YES" : "NO");
      printf ("isdigit (%c) %s\n", i, p);
    }
}