统计0~n中0~9的个数

#include <stdio.h>int main(){    int num;    scanf ("%d",&num);    int a[10] = {0};    int i;    int temp;    for (i=0; i<=num; i++)    { if (i==0){            a[i]++;    continue;}temp = i;while (temp){    a[temp%10]++;    temp = temp / 10;}    }    for (i=0; i<10; i++)    {        printf ("a[%d]: %4d\n",i,a[i]);    }return 0;}