独立按键控制流水灯、蜂鸣器

#include#includesbit 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 intvoid 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--);}

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