51单片机：利用8位数码管动态显示，实现按几次显示几的计数功能

#include 
#include 
#define uint unsigned long			   
#define uchar unsigned char	
sbit D1 = P2^0;	
sbit D2 = P2^1;
sbit D3 = P2^2;
sbit D4 = P2^3;
sbit D5 = P2^4;
sbit D6 = P2^5;
sbit D7 = P2^6;
sbit D8 = P2^7;
sbit S1 = P1^7;
uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; 
uint num;
void delayms(uint xms)			//延时函数
{		
	uint i,j;
	for(i=xms;i>0;i--)
		for(j=10;j>0;j--);
}
	void display(unsigned long num)				   
{
		D1=1;		
		P0=table[(num/10000000)];	
		delayms(1);		
		P0=0XFF;		
		D1=0;	
			
		D2=1;		
		P0=table[(num%10000000)/1000000];	
		delayms(1);		
		P0=0XFF;		
		D2=0;

		D3=1;		
		P0=table[(num%1000000)/100000];	
		delayms(1);		
		P0=0XFF;		
		D3=0;		

		D4=1;		
		P0=table[(num%100000)/10000];	
		delayms(1);		
		P0=0XFF;		
		D4=0;

		D5=1;		
		P0=table[(num%10000)/1000];	
		delayms(1);		
		P0=0XFF;		
		D5=0;	
		
		D6=1;		
		P0=table[(num%1000)/100];	
		delayms(1);		
		P0=0XFF;		
		D6=0;
	
		D7=1;		
		P0=table[(num%100)/10];	
		delayms(1);		
		P0=0XFF;		
		D7=0;

		D8=1;		
		P0=table[num%10];	
		delayms(1);		
		P0=0XFF;		
		D8=0;
}

void main()
{
	TMOD=0x01;		//采用T0方式，M0置1，将M1置0
	EA=1;		
	EX0=1;	

	num=00000000;	

		while(1)
		{	
			while(1)
			{																							 
			display(num);
					
				if(S1==0)
				{
					delayms(50);
					if(S1==0)	
					{
						num++;
					}
					while(!S1);					 //消抖
					delayms(50);
					while(!S1);
					break;	
				}				
			}																							           
	 	}	
}

Proteus仿真