单片机智能秒表 ,怎么写程序啊?答:include<reg52.h> code char tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};code char tab1[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd, 0x87,0xff,0xef};sbit key1=P1^0;sbit key2=P1^1;sbit key3=P1^2;sbit key4=P1^3;sbit key5=P1^4;sbit beep=...