#include <REGX51.H>void delay_10ms(unsigned char q);void main() { while(1) { P0^0=0; //有错误 delay_10ms(50); } }void delay_10ms(unsigned char q) { unsigned char w,e; for(;q>0;q--) for(w=38;w>0;w--) for(e=130;e>0;e--); }