80c51单片机120秒延时程序怎么编写答:用定时器就可以了,很简单的 这是我的60s倒计时程序 include"reg51.h"char i,j,m,y;unsigned char count=0;unsigned char a[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};sbit p34=P3^4;sbit p35=P3^5;sbit warning=P3^7;void delay(){ TH0=0xd8;TL0=0xf0;TR0...