C实现 显示重复的数字

#include<stdio.h>int main(){    int i=0,k=0,a[10]={0};    long n;    printf("Enter a number:");    scanf("%ld",&n);    while(n>0)    {       k=n%10;       if(a[k])       {          a[k]++;          n/=10;          continue;       }       a[k]=1;       n/=10;    }    printf("Repeated digit(s):");    for(i=0;i<=9;i++)    if(a[i]>1)    {        printf(" %d",i);    }    getch();}