/*Jacob Dixon
 *October 10, 2012
 *INF 260-002
 *Program 3: For Loop, Do-While Loop, Array, Switch Statements
 *
 */

 import java.util.Scanner;

public class prog3 {

    public static void main(String[] args) {

        long [] numbers = new long [20];
        Scanner input = new Scanner(System.in);
        System.out.println( "Please select an option:\n0 - initialize array\n1 - square array\n2 - reverse array\n3 - accumulate array\n4 - halve array\n5+ - to quit" );

        int cmd = input.nextInt();
        do{
        switch( cmd ){
            case 0: //Initialize array
                System.out.println( "Initially the array contains:" );
                for( int x = 0; x < numbers.length; x++ )
                {
                    numbers[x] = x;
                    System.out.println( numbers[x] );
                }
                break;

            case 1: //Squares array
                long square = 0;
                for( int x = 0; x < numbers.length; x++ )
                {
                    square = numbers[x]*numbers[x];
                    numbers[x] = square;
                    System.out.println( "Now the array contains:\n" + numbers[x] );
                }
                break;

            case 2: //Reverse array
                for( int x = 0; x < numbers.length/2; x++ )
                {
                    long temp = numbers[x];
                    numbers[x] = numbers[numbers.length-x-1];
                    numbers[numbers.length-x-1] = temp;
                    System.out.println( "Now the array contains:\n" + numbers[x] );
                }
                break;

            case 3: //Accumulate array
                long sum = 0;
                for( int x = 0; x < numbers.length; x++ )
                {
                    sum = sum+numbers[x];
                    numbers[x] = sum;
                    System.out.println( "Now the array contains:\n" + numbers[x] );
                }
                break;

            case 4: //Halve array
                long halve = 0;
                for( int x = 0; x < numbers.length; x++ )
                {
                    halve = numbers[x]/2;
                    numbers[x] = halve;
                    System.out.println( "Now the array contains:\n" + numbers[x] );
                }
                break;

            default: //Quit the array
                System.out.println( "Quitting the array." );
                break;
            }

        }while( cmd < 5 && cmd > -1);
    }
}