C-Program to Check if Repeated digits are there using Recursion

#include<stdio.h>

void GetRpeatedDigit(int num,int frequency[]);

int CheckRpeatedDigit(int frequency[],int totalDigits,int flag);

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;

    }

 GetRpeatedDigit(num,frequency);

 flag=CheckRpeatedDigit(frequency,9,0);//Only 10 digits will be there from 0-9 and we will count from 0-9

 if(flag==0)

 {

  printf("No Repeated Digits\n");

 }

 else

 {

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

 }

return 0;

}

void GetRpeatedDigit(int num,int frequency[])

{

 int k;

 if(num>0)

    {

      k=num%10;

      frequency[k]+=1;

      num/=10;

   GetRpeatedDigit(num,frequency);

    }

    else

    {

     return;

    }

   

}

int CheckRpeatedDigit(int frequency[],int totalDigits,int flag)

{

    if(totalDigits>=0)

    {

      if(frequency[totalDigits]>1)

      {

        flag=1;

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

      }

      totalDigits--;

      CheckRpeatedDigit(frequency,totalDigits,flag);

    }

    else

    {

     return(flag);

    }

}