CCF1020 数字识别

#include<stdio.h>
int main()
#define N 4
{
    int x,a[N],l,i;
    scanf("%d",&x);
    l=0;
    while(x!=0)
    {
        a[l++]=x%10;
        x=x/10;
    }
    printf("%d\n",l);
    for(i=l-1;i>=0;i--)
    {
        printf("%d\n",a[i]);
    }
    return 0;

}