用c51写简易秒表程序,用四个LED数码显示,显示时间为00.00到99.99s,每0...答:include <reg52.h>#define u8 unsigned char#define u16 unsigned intsbit key1=P3^2;sbit key2=P3^3;sbit D0=P2^0;sbit D1=P2^1;sbit D2=P2^2;sbit D3=P2^3;u16 js;u8 js1;u8 zt=0;u8 ds[4];char flag; const u8 tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8...