#include?"reg51.h" ?//? 試試
sbit?k1?=?P1^0;//按鍵1
sbit?k2?=?P1^1;//按鍵2
sbit?k3?=?P1^2;//按鍵3
sbit?k4?=?P1^3;//按鍵4
sbit?p5?=?P1^5;?//輸出1
sbit?p6?=?P1^6;?//輸出2
bit? t1,?t2;
void?main(void)
{
while(1){
if(k1==0?&&?t1==0)?{t1=1;?p5=1;} if(k2==0?&&?t1==0)?{t1=1;?p5=0;} if(k1==1?&&?k2==1)?{t1=0;} if(k3==0?&&?t2==0)?{t2=1;?p6=1;} if(k4==0?&&?t2==0)?{t2=1;?p6=0;} if(k3==1?&&?k4==1)?{t2=0;}}}