求一个51单片机内部中断1最简单的倒计时源程序。30秒倒计时。答:include<reg52.h> define uchar unsigned char uchar code table[ ]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};unsigned int i;void init( );void display;void delay(uchar z){ uint x,y;for(x = z;x>0;x--)for(y = 110;y>0;y--)} void main(){ init( ...
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...