tassert.c

来自「单片及c语言轻松入门的随书光盘」· C语言 代码 · 共 25 行

#include "reg51.h"
#include <stdio.h> /*为使用printf函数而加入*/
#include <assert.h>
serial_init ()  {
  SCON  = 0x50; 
  TMOD |= 0x20; 
  PCON |= 0x80; 
  TH1 	= 	0xfd;
  TR1   = 	1; 
  TI	=	1;
}
void check_parms (char *string)
{
	assert (string != NULL); /* 检查空指针*/
	printf ("String %s is OK\n", string);
}
void main()
{
	char *string;
	serial_init();	
	for(;;)
	{	check_parms(string);
	}
}