/*
 * Code Snippets for Chapt 10
 */
public class Chapt10Snippets {

	public static void main(String[] args) {
		test0( );
		test1( );
		test2( );
		test4( );
	}
	
	public static void test0( ) {
		int option = 9;
		if ( option == 1 )
		    System.out.println( "Read image" );
		else if (option == 2 )
			System.out.println( "Double" );
		else if ( option == 9 )
		    System.out.println( "Quit" );
		else
		    System.out.println( "Sorry, invalid option" );
		
		switch ( option ) {
		case 1:
			System.out.println( "Read image" );
			break;
		case 2:
			System.out.println( "Double" );
			break;
		case 9:
			System.out.println( "Quit" );
			break;
		default:
			System.out.println( "Sorry, invalid option" );
			break;
		}
		
		/* int */ option = 2;
		switch ( option ) {
		case 1:
		    System.out.println( "Read image" );
		case 2:
		    System.out.println( "Double" );
		case 9:
		    System.out.println( "Quit" );
		default:
		    System.out.println( "Sorry, invalid" );
		}
		
		char command = 'D';
		switch ( command ) {
		case 'i':
		case 'I':
			System.out.println( "Insert" );
			break;
		case 'd':
		case 'D':
			System.out.println( "Delete" );
			break;
		case 'r':
		case 'R':
			System.out.println( "Replace" );
			break;
		}
	}
	
	public static void test1( ) {
		int option = 1;
		switch ( option ) {
			case 2:
			    System.out.println( "Case 2" ); break;
			case 1:
			    System.out.println( "Case 1" ); break;
			default:
			    System.out.println( "Default case" ); break;
			case 9:
			    System.out.println( "Case 9" ); break;
			}
	}
	
	public static void test2( ) {
		double sum;
		int n;
		
		sum = 0.0;
		n = 1;
		while (  n <= 5 ) {
		    sum += n;
		    n++;
		}
		System.out.println( "sum: " + sum + " n: " + n );
		
		sum = 0.0;
		for ( n = 1; n <= 5 ; n++ ) {
		    sum += n;
		}
		System.out.println( "sum: " + sum + " n: " + n );
		
		int count;
		int m;
		int max = 4;
		
		for ( count = 4; count >= 0; count-- )
		    System.out.println( count + " bottles of beer on the wall" );
		
		// Loop that counts by twos, from 0, 2, 4, ..., 2*max:
		
		for ( m = 0; m <= 2*max; m += 2 ) {
		    // ... something exciting ...
			System.out.println( "m: " + m );
		}
		// The loop-control variable can be defined within the initialization.  
		// Note that the scope of the variable is limited to the for-loop:
		for ( int i = 0; i < 20; i++ ) {
		    sum = sum + i;
		}
		// Does not compile:   System.out.println ( i );

		// Does not compile: for ( int j = 0; j < 100; j++; ) System.out.println( j );
		
		int k;
		
		for ( k = 0; k < 10; k++ ) ;
		System.out.println( k );
		
		int z;
		int low = 4;
		int high = 6;
		for ( z = low; z != high; z ++ ) {		// loops infinitely if high < low
			System.out.println( "z = " + z );
		}
	}
	
	static void test3( ) {
		int[] sequence = { 3, 6, 13, 19, 25, 22, 28, 32, -999 };
		boolean isIncreasing = true;
		int i = 0;
		int prev = sequence[i++];
		int curr = sequence[i++];
		while ( curr != -999 ) {
			if ( prev >= curr ) {
				isIncreasing = false;
				break;
			}
			prev = curr;
			curr = sequence[i++];
		}
		if ( isIncreasing ) System.out.println( "Increasing" );
		else System.out.println( "Non-increasing" );
	}
	
	static void test4( ) {
		int count;
		for (count = 1; count <= 500; count++ ) {
			if ( Math.random( ) < 0.01 ) break;
		}
		System.out.println( "count = " + count );
		
		boolean foundIt = false;
		for (count = 1; ( count <= 500 && ! foundIt) ; count++ ) {
			if ( Math.random( ) < 0.01 ) { foundIt = true; count--; }
		}
		System.out.println( "count = " + count );

	}
}