ex1.c

零基础单片机C语言设计全套教程

#include <intrins.h> 							//头文件
#include <stdio.h>
#include <reg51.h>

void	main(void)			  				//主函数
{
bit flag;									//声明位变量

//初始化串口

flag=1;									//置位位变量
if(_testbit_(flag))							//位测试函数
	printf("Bit was set\n");
else
	printf("Bit was clear\n");

if(_testbit_(flag))							//再次进行位测试函数
	printf("Bit was set\n");
else
	printf("Bit was clear\n");
}