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;	
}