51单片机 芯片是89C52 实现秒表计时器！急急……

#include unsigned char x,y; sbit H=P3^6; unsigned char D[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //用于数字0~9的显示数据表 void delay(unsigned char a){ //延时程序 unsigned char i; while(a--) for(i=115;i>0;i--