基于51单片机控制的9999秒倒计时器的设计,程序怎样做?答:99秒倒数的 楼主看行不 在写 很麻烦的 include <reg51.h> unsigned char table[]={0x90,0x80,0xf8,0x82,0x92,0x99,0xb0,0xa4,0xf9,0xc0};unsigned char int_time ;unsigned char second;void delay(void){ unsigned char i,j;for(i=0;i<200;i++)for(j=0;j<20;j++);} void...