A 5 DIGIT NUMBER IS INPUT THROUGH THE KEY BOARD. OUTPUT IS A NEW NUMBER ADDING 1 TO EACH OF ITS DIGITS. IN C

A 5 digit number is input through the key board. Output is a new number adding 1 to each of its digits in c programming

#include<stdio.h>

int add(long int);

int main(){

  long int num;

  int add(long int);

  printf("\nEnter a 5 digit number: ");

  scanf("%ld",&num);

  add(num);

  return 0;

}

 add(long int num){

   long int r;

   if(num){

         r=num%10;

        r=r+1;

        if(r==10)

             r=0;

        add(num/10);

        printf("%d",r);

    }

    else

         return;

}