仿真电路四-独立按键

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#include "reg51.h"
sbit key=P0^0;
char num[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
int n=0;
void delay(unsigned int n)
{
	int i,j;
	for(i=0;i<n;i++)
		for(j=0;j<500;j++);
}

void keyfun()
{
	if(key==0)
	{
		delay(50);
		if(key==0)
			n++;
	}
	if(n==10)
		n=0;
}

void smg()
{
	P2=num[n];
}

int main()
{
	while(1)
	{
		keyfun();
		smg();
	}
}
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#include "reg51.h"
sbit key=P0^0;
char num[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
int n=0,sign=0;
void delay(unsigned int n)
{
	int i,j;
	for(i=0;i<n;i++)
		for(j=0;j<500;j++);
}

void keyfun()
{
	if(key==0&&sign==0)
	{
		delay(10);
		if(key==0&&sign==0)
		{
			sign=1;
			n++;
		}			
	}
	if(key==1&&sign==1)
	{
		delay(10);
		if(key==1&&sign==1)
			{
				sign=0;
			}
	}
	
	if(n==10)
		n=0;
}

void smg()
{
	P2=num[n];
}

int main()
{
	while(1)
	{
		keyfun();
		smg();
	}
}