[简答题]实现简易秒表功能（显示从0秒一直到99秒然后又从0秒开始）。

参考答案:
#include“reg51.h”
Void m(unsigned char i)
{unsigned char a;
For(a=0;a<i;a++)
{TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;
While(!TF0);
TF0=0;}}
Main()
{TMOD=0X01;
Unsigned char led[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,
0x90};
Unsigned char i;
While(1)
{for(i=0;i<100;i++)
{P1=led[i/10];
P2=led[i%10];
M(20);}
If(i==100)
{
I=0;}}}