// summing.cpp
// Bob Myers
//
// A typical kind of for-loop algorithm -- multiplying things

#include <iostream>
using namespace std;

int main()
{
  int value;
  cout << "Enter an integer: ";
  cin >> value;

  long product = 1;			// initialize an accumulator variable
  int i;
  for (i = 1; i <= value; i++)
  {
     if (i % 5 == 0)			// if the index is divisible by 5
        product = product * i;		//  multiply it in to the accumulator
  }

  cout << "In the range 1 through " << value 
	<< ",\n\tthe product of the numbers that are divisible by 5 = " 
	<< product << '\n';

  return 0;
}