pat乙级 1021个位数统计

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define k 1000
int main()
{
    int i = 0;
    char num[k];
    for (i = 0; i < k; i++)
    {
        num[i] = 'a';
    }
    int zhen[k];
    for (i = 0; i < k; i++)
    {
        zhen[i] = -1;
    }
    scanf("%s", num);
    i = 0;
    while (num[i] != '\0')
    {
        zhen[i] = num[i] - '0';
        i++;
    }
    int count[10] = {0};
    for (i = 0; i < k; i++)
    {
        if (zhen[i] == -1)
        {
            break;
        }
        if (zhen[i] == 0)
        {
            count[0]++;continue;
        }
        if (zhen[i] == 1)
        {
            count[1]++;continue;
        }
        if (zhen[i] == 2)
        {
            count[2]++;continue;
        }
        if (zhen[i] == 3)
        {
            count[3]++;continue;
        }
        if (zhen[i] == 4)
        {
            count[4]++;continue;
        }
        if (zhen[i] == 5)
        {
            count[5]++;continue;
        }
        if (zhen[i] == 6)
        {
            count[6]++;continue;
        }
        if (zhen[i] == 7)
        {
            count[7]++;continue;
        }
        if (zhen[i] == 8)
        {
            count[8]++;continue;
        }
        if (zhen[i] == 9)
        {
            count[9]++;continue;
        }
    }
    for(i=0;i<10;i++){
        if(count[i]!=0){
            printf("%d:%d\n",i,count[i]);
        }
    }

}