/**
  * @author  monika heiner
  * @version 1.0
  * @date 10.04.2012
  * @class WhileDemo2
  */

import java.util.Scanner;
class WhileDemo2 {

// wiederholte alternative Berechnung von Kugel- oder Wuerfelvolumen
public static void main(String[] args) { 

	Scanner in = new Scanner(System.in);
	char key;
	String nextKey;
	int i; 		// input -> Radius bzw. Kantenlaenge
	double v; 	// output -> Volumen
	final double PI = 3.14;
	
	System.out.println(".. begin of while demo2 ..");
 	
	loop: while (true) {
		System.out.println("\nWas wollen Sie berechnen?");
		System.out.println("  Kugelvolumen (K)");
		System.out.println("  Wuerfelvolumen (W)");
		System.out.println("  Exit (E)");
		
		nextKey  = in.next();
	    key = nextKey.charAt(0);

		switch (key) {
		case 'k': case 'K': 
		    System.out.println("radius:");
			i = in.nextInt();
			v = i*i*i*PI*4/3;
			System.out.println("  -> Volumen = "+v);
			break;
		case 'w': case 'W': 
		    System.out.println("kantenlaenge:");
			i = in.nextInt();
			v = i*i*i;
			System.out.println("  -> Volumen = "+v);
			break;
		case 'e': case 'E':
			break loop;
		default : 
			System.out.println("==>> Was wollen Sie???");  
		} // switch key
	} // while (true)
	
	System.out.println("\n.. end of while demo2 ..");
	
} // main 

} // WhileDemo2