独立按键控制流水灯、蜂鸣器

#include<reg52.h>
#include<intrins.h>
sbit KEY1=P2^0;
sbit KEY2=P2^1;
sbit KEY3=P2^2;
sbit KEY4=P2^3;
sbit BELL=P2^4;
sbit RED1=P1^0;
sbit YEL1=P1^1;
sbit GRE1=P1^2;
sbit RED2=P1^3;
sbit YEL2=P1^4;
sbit GRE2=P1^5;
sbit RED3=P1^6;
sbit YEL3=P1^7;
sbit GRE3=P3^0;
sbit RED4=P3^1;
sbit YEL4=P3^2;
sbit GRE4=P3^3;
#define uint unsigned int
void Delay(uint);
void Key();
void Bell(uint);
void main()
{
while(1)
Key();
}
void Key()
{
if(KEY1==0 || KEY2==0 || KEY3==0 || KEY4==0)
{
Delay(2);     //20??????????í????·??????
if(KEY1 == 0)
{
RED1=0;
RED2=0;
RED3=0;
RED4=0;
Bell(10);
}
else if(KEY2 == 0)
{
YEL1=0;
YEL2=0;
YEL3=0;
YEL4=0;
Bell(10);
}
else if(KEY3 == 0)
{
GRE1=0;
GRE2=0;
GRE3=0;
GRE4=0;
Bell(10);
}
else
{
RED1=0;
RED2=0;
RED3=0;
RED4=0;
YEL1=0;
YEL2=0;
YEL3=0;
YEL4=0;
GRE1=0;
GRE2=0;
GRE3=0;
GRE4=0;
Bell(10);
}
Delay(50);   //??????±0.5????????????????????????°????ü??????ì????
RED1=1;
RED2=1;
RED3=1;
RED4=1;
YEL1=1;
YEL2=1;
YEL3=1;
YEL4=1;
GRE1=1;
GRE2=1;
GRE3=1;
GRE4=1;
}
}
void Bell(uint a)
{
uint b;
for(b=100;b>0;b--)
{
BELL=0;
Delay(a);
BELL=1;
Delay(a);
}
}
void Delay(uint z)
{
uint x,y;
for(x=100;x>0;x--)
for(y=z;y>0;y--);
}