/**
 * Demonstrates random numbers, integer arithmetic, floating point comparison
 * @author Pete Nordquist
 * @version 100203
 */
public class W05N02
{
	// use the green and white icon to call this method
	public static void roundIt(double d)
	{
		// call Math.round()
		long rslt = Math.round(d);
		System.out.println("rounded number is " + rslt);
		
		// create a 'random' number
		double d1 = Math.random();
		// round this number
		System.out.println("d is " + d1 + ", rounded number is " + 
		Math.round(d1));
	}
	
	public static void intPromtion(int i)
	{
		// promotion by assignment
		// the assignment statement makes i into a double
		double d = i;
		
		// promotion by arithmentic operation
		System.out.println(5.0/i);
		// compare above with
		System.out.println(5/i);
	}
	
	// try the example shown in Week 5, Notes 2
	// call intDiv and supply the values 7, 5
	public static void intDiv(int numerator, int denominator)
	{
		System.out.println("numerator / denominator == " + numerator / denominator);
		System.out.println("numerator % denominator == " + numerator % denominator);
	}
	
	// Using a tolerance value to compare doubles or floats
	// try the example in Week 5, Notes 2
	public static boolean compareDoubles(double d1, double d2, double tolerance)
	{
		//System.out.println("d1 / d2 == " + (d1 / d2));
		if (Math.abs(d1 - d2) < tolerance)
			 return true;
		else
			return false;
	}
}