动态数码管显示

#include<reg51.h>#define D 100typedef unsigned int u16;typedef unsigned char u8;u8 code a[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,            0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};void delay(u16 i){    while(i--);}void main(){    u16 i=0;    while(1)    {        P2=28;        while(P2>=0)        {            P0=a[i++];            delay(D);            P0=0;            P2-=4;              if(i==8)                i=0;        }    }}