text1.c

用 proteus + keil 实现一个00－99计数器 里面用的是 AT89C51

#include <reg51.h>
unsigned char display[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char a=0,b=0;
sbit p10=P1^0;

void delay()
{
	unsigned char i,j;
	for(i=0;i<255;i++)
		for(j=0;j<255;j++)
			{}
}

void set()
{
	P3=display[a];
	P2=display[b];
	a++;
	if(a>9)
	{
		a=0;
		b++;
	}
	if(b>9)
	{
		a=0;
		b=0;
	}
	delay();
}

void main()
{
	p10=1;	
	while(1)
	{
		if(p10==0)
		{
			set();
		}
	}
}