...状态:当无外中断时,主用keil和project显示改为15答:单片机数码管学生 0~15 include<reg51.h> unsigned char led[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};void led_display(unsigned char num);unsigned char key_scan();unsigned char temp,key;sbit led1=P2^0;sbit led2=P2^1;void main(){ unsigned char led_...