/**
  * @author  monika heiner
  * @version 1.0
  * @date 10.04.2012
  * @class IfDemo2
  */

import java.util.Scanner;
class IfDemo2 {

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

	Scanner in = new Scanner(System.in);
	char key;
	String nextKey;
	int i; 		// input -> Radius bzw. Kantenlänge
	double v; 	// output -> Volumen
	final double PI = 3.14;
	
	System.out.println(".. begin of if demo ..\n");
 	
	System.out.println("Was wollen Sie berechnen?");
	System.out.println("  Kugelvolumen (K)");
	System.out.println("  Wuerfelvolumen (W)");
	
	nextKey  = in.next();
	key = nextKey.charAt(0);
	
	/* Version1 
	if (key =='k' || key =='K') {
		System.out.println("radius:");
		i = in.nextInt();
		v = i*i*i*PI*4/3;
		System.out.println("  -> Volumen = "+v);
	} else {
		// key =='w' || key =='W') 
		System.out.println("kantenlaenge:");
		i = in.nextInt();
		v = i*i*i;
		System.out.println("  -> Volumen = "+v);
	} // if
	
	
	// Version2
	if (key =='k' || key =='K') {
		i = in.nextInt("radius:");
		v = i*i*i*PI*4/3;
		System.out.println("  -> Volumen = "+v);
	} else {
		// do nothing
	} // if
	if (key =='w' || key =='W') {
		i = in.nextInt("kantenlaenge:");
		v = i*i*i;
		System.out.println("  -> Volumen = "+v);
	} // if
	
	
	// Version3
	if (key =='k' || key =='K') {
		System.out.println("radius:");
		i = in.nextInt();
		v = i*i*i*PI*4/3;
		System.out.println("  -> Volumen = "+v);
	} else { 
		if (key =='w' || key =='W') { 
			System.out.println("kantenlaenge:");
			i = in.nextInt();
			v = i*i*i;
			System.out.println("  -> Volumen = "+v);
		} else {
			System.out.println("Was wollen Sie???");
		} // if
	} // if
	*/


	// Version4
	if (key =='k' || key =='K') {
		System.out.println("radius:");
		i = in.nextInt();
		v = i*i*i*PI*4/3;
		System.out.println("  -> Volumen = "+v);
	} else if (key =='w' || key =='W') { 
		System.out.println("kantenlaenge:");
		i = in.nextInt();
		v = i*i*i;
		System.out.println("  -> Volumen = "+v);
	} else {
		System.out.println("Was wollen Sie???");
	} // if

	
} // main

} // IfDemo2