#include<reg52.h>void delay(unsigned char i){    unsigned char j,k;    for(j = 0 ; j <255; j++)        for(k = 0 ; k < i; k ++)            ;}void main(){    unsigned char code chagenum[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E}; // 0-9}    unsigned char i;    while(1)    {        for(i = 0; i < 16; i++)        {            P1 = chagenum[i];            delay(200);        }    }}