C Programming using Reverse a given number using Recursion

#include <stdio.h>

int sum=0,rem;

int reverse_function(int num)

{

  if(num)

  {

    rem=num%10;

    sum=sum*10+rem;

    reverse_function(num/10);

  }

  else

    return sum;

    return sum;

 }

  int main()

  {

     int num,reverse_number;

     printf("Enter any number:");

     scanf("%d",&num);

     

     reverse_number=reverse_function(num);

     printf("The reverse of entered number is :%d",reverse_number);

     

     return 0;

 }