/*
 *  File:   Commands.java
 *  Author: Stephen Gilmore
 *  Copyright: School of Computer Science, The University of Edinburgh
 *
 *  Commands.java,v 1.2 2002/10/24 14:00:43 da Exp
 */

public class Commands {

    static void conditionals() {
	int x = 0;
	System.out.println("\nConditionals");
	if (x == 0) 
	    System.out.println ("zero");              // printed
	if (x != 0) 
	    System.out.println ("non-zero");          // not printed
	if (x == 0) 
	    System.out.println ("zero");              // printed
	else
	    System.out.println ("non-zero");          // not printed
    }

    static void switches() {
	int x = 0;
	char c = 'o';
	System.out.println("\nSwitches");
	switch (x) {
	case 0:  System.out.println ("zero");         // printed
	default: System.out.println ("non-zero");     // printed
	};
	switch (c) {
	case 'a': System.out.println ("vowel");       // not printed
	case 'e': System.out.println ("vowel");       // not printed
	case 'i': System.out.println ("vowel");       // not printed
	case 'o': System.out.println ("vowel");       // printed
	case 'u': System.out.println ("vowel");       // printed
	default:  System.out.println ("consonant");   // printed
	}
    }

    static void switchesWithBreaks() {
	int x = 0;
	char c = 'o';
	System.out.println("\nSwitches with breaks");
	switch (x) {
	case 0:  System.out.println ("zero");         // printed
	         break;
	default: System.out.println ("non-zero");     // not printed
	         break;
	};
	switch (c) {
	case 'a': System.out.println ("vowel");       // not printed
	          break;
	case 'e': System.out.println ("vowel");       // not printed
	          break;
	case 'i': System.out.println ("vowel");       // not printed
	          break;
	case 'o': System.out.println ("vowel");       // printed
	          break;
	case 'u': System.out.println ("vowel");       // not printed
	          break;
	default:  System.out.println ("consonant");   // not printed
	          break;
	}
    }

    static void iteration() {
	int x = 3;
	System.out.println("\nIteration");
	while (x > 0) {
	    System.out.println("decreasing");
	    x--;
	}
	System.out.println("finished");
   }

    public static void main(String[] args) {
	conditionals();
	switches();
	switchesWithBreaks();
	iteration();
    }

}