单片机编程设计要求如下：在单片机的P0口接有8个发光二极管作为指示灯，P1.0~P1.3接有4个按键

#include #define uchar unsigned char sbit key1=P1^0; sbit key2=P1^1; sbit key3=P1^2; sbit key4=P1^3; uchar LED=0xfe; void delay(uchar a) { uchar i,j; for(i=0;i<a;i++) for(j=0;j<120;j++); } main() { P0=0xff; while(1) {