//this program uses a function that returns true or false.
#include <iostream>
using namespace std;

//function prototype
bool isEven(int);

int main()
{
	int val;
	
	//get a number from the user.
	cout << "Enter an integer and I will tell you ";
	cout << "if it is even or odd: ";
	cin >> val;
	
	//indicate whether it is even or odd.
	if (isEven(val))
		cout << val << " is even.\n";
	else 
		cout << val << " is odd.\n";
	return 0;
}

//*******************************************************************
// definition of function isEven. this function accepts an			*
// integer argument and tests it to be even or odd. the function	*
// returns true if the argument is even or false if the argument	*
// is odd. the return value is an bool.								*
//*******************************************************************

bool isEven(int number)
{
	bool status;
	
	if (number % 2 == 0)
		status = true;	//number is even if there is no remainder.
	else 
		status = false;	//otherwise, the number is odd.
	return status;
}