//
//	TwoCatchesDemo.java
//
//	P.687, Listing 9.8
//
import java.util.Scanner;
public class TwoCatchesDemo
{
	public static double exceptionalDivision(double nume, double deno)
		throws DividedByZeroException
	{
		if(deno == 0)
			throw new DividedByZeroException();

		return nume/deno;
	}
	public static void main(String[] args)
	{
		Scanner kb = new Scanner(System.in);
		try
		{
			System.out.print("Enter # of widgets: ");
			int widgets = kb.nextInt();
			if(widgets < 0)
				throw new NegativeNumberException("widgets");

			System.out.print("How many are defective: ");
			int defective = kb.nextInt();
			if(defective < 0)
				throw new NegativeNumberException("defectvie widgets");
			double ratio = exceptionalDivision(widgets, defective);
			System.out.println("One in every " + ratio + " + widgets is defective.\n\n\n");
		}
		catch(NegativeNumberException e)
		{
			System.out.println("Can't have a negative number of " + e.getMessage());
		}
		catch(DividedByZeroException e) 	//Note: not include e.getMessage()
		{
			System.out.println("Cong! A perfect record!");
		}
		System.out.println("End of program.\n\n\n");
	}
}