// Doing computations in java
import uwcse.io.*;
import javax.swing.JOptionPane; //for the dialog boxes
import java.util.*;

/**
 * A MakingCoasters object has a rectangular piece of fabric, defined by its
 * width and length.<br>
 * It can compute the number of coasters of a certain radius that can be cut out
 * of that piece of fabric and the percentage of fabric that goes unused
 */

public class MakingCoasters {
	// instance variables
	// Dimensions of the piece of fabric (in feet)
	private int width;

	private int length;

	// Note: using the same name for more than one method (here for
	// the constructors) is an example of overloading.

	/**
	 * Default constructor for objects of type MakingCoasters.<br>
	 * The dimensions of the piece of fabric are input by the user.<br>
	 * If any input is negative or 0, the corresponding dimension is set to 1
	 * foot.
	 */
	public MakingCoasters() {
		// Initialize the dimensions of the piece of fabric
		// Input from the user via an input object

		// Check that the input is valid (dimension>0)
		// Use a method checkWidthAndLength()
		// (we will use it again in the other constructor)

	}

	/**
	 * MakingCoasters constructor<br>
	 * Width and length are set to w and l if w and l are positive integers.<br>
	 * If any of them is negative or zero, the corresponding dimension is set to
	 * one foot.
	 * 
	 * @param w
	 *            the width of the piece of fabric
	 * @param l
	 *            the length of the piece of fabric
	 */
	public MakingCoasters(int w, int l) {

	}

	/**
	 * Compute the number of coasters of a given radius that can be cut out of
	 * the piece of fabric.
	 * 
	 * @param radius
	 *            the radius of one coaster in feet.
	 */
	public int computeNumberOfCoasters(int radius) {
		// If the radius is negative or 0, no coaster is cut out
		// Display an error message and return 0
		if (radius <= 0) {

		} else {
			// To find the number of coasters:
			// Multiply the number of coasters that fit along the length by the
			// number of coasters that fit along the width and return the
			// result.
			// IMPORTANT NOTE: / between integers is the integer division
			// 50/3 is 16 (not 16.6666)
		}
	}

	/**
	 * Compute the percentage of fabric that goes unused when cutting out
	 * coasters of a given radius
	 * 
	 * @param radius
	 *            the radius of one coaster in feet
	 */
	public double computePercentageUnused(int radius) {
		// If the radius is negative or 0, no coaster is cut out
		// Display an error message and return 100
		if (radius <= 0) {
		} else {
			// Area of the piece of fabric
			double fabricArea;
			// compute the area used for the coasters
			// Math.PI is a constant within the Math class (=3.1415...)
			// There is no exponent in Java. To square radius, write
			// radius*radius
			// (for higher exponents, use the Math.pow method)
			double usedArea;
			// area unused
			double unusedArea;
			// return it as a percentage
		}
	}

	/**
	 * Check that the width and length are positive integers.<br>
	 * Set to one foot any of them that is negative or 0 and display an error
	 * message.
	 */
	private void checkWidthAndLength() {
	}

}