/* Function
Input: integer n.
Output: true if n is even; false if n is odd
  */
#include <iostream>
#include <string>
using namespace std;
bool is_even(int n);
int main()
{
	int n;
	cout << "Enter an integer: ";
	cin >> n;
	// Same as if (is_even(n) == true)
	if (is_even(n))
		cout << n << " is even.\n"; 
	else
		cout << n << " is odd.\n";
	return 0;
}

bool is_even(int n)
{
	if (n % 2 == 0)
		return true;
	else
		return false;
}