1.c

一键多控制的89C51程序

#include<reg51.h>
#define  uchar unsigned char
#define uint unsigned int 
uint ID=0;
sbit P3_7=P3^7;
sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_2=P1^2;
sbit P1_3=P1^3;
void delay(uchar z)
{
	uint i,j;
	for(i=z;i>0;i--)
	{
		for(j=110;j>0;j--);
	}
}




void main()
{
	while(1)
		{
			if(P3_7==0)
			{
				delay(10);
				if(P3_7==0)
				{
					ID++;
					if(ID==4)
					{
						ID=0;	
					}
					
					while(P3_7==0);
				}
			}
			switch(ID)
			{
				case 0:
					P1_0=~P1_0;
					delay(120);
					break;
				case 1:
					P1_1=~P1_1;
						delay(120);
						break;
				case 2:
						P1_2=~P1_2;
					delay(120);
					break;
				case 3:
						P1_3=~P1_3;
					delay(120);
					break;
			}
		}

}