1#include <STC89C5xRC.H>
2#include <delay.h>
3// 移位
4int main(){
5	unsigned char a = 0x01; // 如果是char 则>>时就会出问题，因为>>时会补符号位
6	while(1){
7		if(P24 == 0){
8			Delay_ms(20);
9			if(P24 == 0){
10				while(P24 == 0);
11				a = a<<1;
12				if(a == 0) a = 0x01;
13			}
14		}
15		if(P25 == 0){
16			Delay_ms(20);
17			if(P25 == 0){
18				while(P25 == 0);
19				a = a>>1;
20				if(a == 0) a = 0x80;
21			}
22		}
23		P0 = ~a;
24	}
25}