7447做的数码管显示Proteus仿真

#include<reg51.h> #define uint unsigned int #define uchar unsigned char uchar scan; uchar code disp[]={8,5,0,1}; void delayms(int m); main() { uchar i; while(1) { scan=1; for(i=0;i<4;i++) { P2=disp[3-i]; P1=~scan; delayms(300); scan<<=1; } } } void delayms(int m) { int i,j; for(i=0;i<m;i++) for(j=0;j<120;j++); }