C-Program to check whether there are repeated digits in given Number

#include<stdio.h>

int main()

{

 int num,k,temp,frequency[9],flag=0,i;

 printf("Enter number to find which digits are repeated\n");

 scanf("%d",&num);

 temp=num;

 //By default setting frequency of digits as zero

 for(i=0;i<10;i++)

 {

     frequency[i]=0;

 }

 while(num>0)

 {

  k=num%10;

  frequency[k]++;

  num/=10; 

 }

 for(i=0;i<10;i++)

 {

  if(frequency[i]>1)

  {

   flag=1;

   printf("%d --> repeated %d times\n",i,frequency[i]);

  }

 }

 if(flag==0)

 {

  printf("No Repeated Digits\n");

 }

 else

 {

  printf("Repeated digits are there\n");

 }

return 0;

}