#include<iostream>
//#include<iomanip>

using namespace std;

//naming functions
//void - verb - verb noun
//non-void - noun that describes the value returned

void sayHi()
{
	cout << "Hi\a" << endl;
}

double pi()
{
	double result = 3.14159426;
	//one return statement
	//logic goes here
	return result;
}

double square(double n)
{
	double result = n * n;

	return result;
}

int greatest(int x, int y)
{
	int result = x;

	if(y > x)
	{
		result = y;
	}
	
	return result;
}


bool isEven(int x)
{
	bool result = true;

	if(x%2 != 0)
	{
		result = false;
	}

	return result;
}

bool isOdd(int x)
{
	//return (x%2 != 0);
	return !isEven(x);
}

int leastCommonMultiple(int x, int y)
{
	int biggest = greatest(x,y); 
	int result = biggest;

	while(result % x != 0 || result % y != 0)
	{
		result += biggest;
	}

	return result;
}

//by value vs by reference
void make7(int& x)
{
	x = 7;
	cout << "Make7= " << x << endl;
}

void swap(int& x, int& y)
{
	int temp = x;
	x = y;
	y = temp;
}

void main()
{
	cout << greatest(6,9);

	if(isOdd(63))
	{
		cout << "Odd\n";
	}
	cout << leastCommonMultiple(50,3);

	int k = 99;
	make7(k);
	cout << k << endl;

	int w = 234;

	swap(k,w);
	cout << "k = " << k << "\nw = "<<  w << endl;
}