#include <iostream>		// for cout and cin
#include <conio.h>		// for getch()
#include <cmath>        // for pow()
using namespace std;	// for cout and cin

int main() {

	/*
	 *	Wages Calculator
	 */
	cout << "Wages Calculator" << endl;
	double	regularWages,
			basePayRate = 18.25,
			regularHours = 40.0,
			overtimeWages,
			overtimePayRate = 27.78,
			overtimeHours = 10,
			totalWages;

	regularWages = basePayRate * regularHours;
	overtimeWages = overtimePayRate * overtimeHours;
	totalWages = regularWages + overtimeWages;

	cout << endl << "Total Wages: $" << totalWages << endl;
	getch();

	/*
	 *	Volume of Cylinder
	 */
	cout << endl << "Volume of Cylinder" << endl;
	const	double PI = 3.14159;
	double	radius = 12.34;
	double	height = 23.45;
	double	volume = PI * pow( radius, 2) * height;
	cout << "Volume: " << volume << endl;
	getch();

	/*
	 *	Integer and Floating Point Division
	 */
	cout << endl << "Integer and Floating Point Division" << endl;
	double fraction = 5 / 2;
	cout << "fraction: " << fraction << endl;
	fraction = 5 / 2.0;
	cout << "fraction: " << fraction << endl;
	getch();

	/*
	 *	Average Calculator
	 */
	cout << endl << "Average Calculator" << endl;
	cout << "Enter 3 test scores:" << endl;
	int score1, score2, score3, average;
	cin >> score1 >> score2 >> score3;
	average = ( score1 + score2 + score3 ) / 3.0;
	cout << "Average: " << average << endl;
	getch();

	/*
	 *	Increment / Decrement
	 */
	cout << endl << "Increment / Decrement" << endl;
	int x, y;
	x = 1;
	cout << "x = " << x << endl;
	y = ++x;	// x is now 2, y is also 2
	cout << "x = " << x << ", y = " << y << endl;
	y = x++;	// x is now 3, y is 2
	cout << "x = " << x << ", y = " << y << endl;
	
	x = 3;
	y = x--;	// x is now 2, y is 3
	cout << "x = " << x << ", y = " << y << endl;
	y = --x;	// x is now 1, y is also 1
	cout << "x = " << x << ", y = " << y << endl;
	getch();

	/*
	 *	Pythagoras
	 */
	cout << endl << "Pythagoras" << endl;
	cout << "Enter sides:" << endl;
	double a, b, c;
	cin >> a >> b;
	c = sqrt ( pow ( a, 2 ) + pow ( b, 2 ) );
	cout << "Hypotenuse: " << c << endl;
	getch();
}