Find strong in given range using c++ program

Find strong in given range using c++ program
Write a c++  program to find strong no in given range.

#include<iostream>

int main(){

  int num,i,f,r,sum,temp;

  int min,max;

  cout << "Enter minimum range: ";

  cin >> min;

  cout << "Enter maximum range: ";

  cin >> max;

  cout << "Strong numbers in given range are: ";

  for(num=min; num <= max; num++){

      temp = num;

      sum=0;

      while(temp){

           i=1;

           f=1;

           r=temp%10;

           while(i<=r){

             f=f*i;

             i++;

           }

         sum=sum+f;

         temp=temp/10;

      }

       

      if(sum==num)

          cout << num;

  }

  return 0;

}