// Joshua Ellis
// 10/21/2012
//This program prints a grid of stars and zeros based on the size entered from 5-21.
// E.G.
// 0****** 
// *0***** 
// **0**** 
// ***0*** 
// ****0** 
// *****0* 
// ******0

import java.util.Scanner;

public class Assignment2_4 {

	public static void main(String[] args) {

		// objects and variables
		Scanner input = new Scanner(System.in);
		int drawingSize = 5;
		char keepGoing = 'Y';
		String[] drawEachRow;

		System.out.println("Drawing Program");
		System.out.println("===============");

		// keep looping until user inputs something other than Y or y
		while (keepGoing == 'Y' || keepGoing == 'y') {
			System.out.print("How many rows/columns (5-21)? ");
			drawingSize = input.nextInt();

			// check input for proper range
			while (drawingSize < 5 || drawingSize > 21) {
				System.out.print("Out of Range! Re-enter: ");
				drawingSize = input.nextInt();
			}

			// initialize array based on size of drawing
			drawEachRow = new String[drawingSize];
			for (int i = 0; i < drawingSize; i++) {
				drawEachRow[i] = "*";
			}

			System.out.println();

			// display drawing
			for (int rows = 0; rows < drawingSize; rows++) {
				for (int columns = 0; columns < drawingSize; columns++) {

					// place zeros in each correct spot based on the current
					// row. This adds zeros in every position UP TO and
					// including the current row position (e.g. row 2 > position
					// 2)
					drawEachRow[rows] = "0";

					// print each row
					System.out.print(drawEachRow[columns]);

					// this removes all 0s from the array so it contains only
					// *s. This is so that the previously added 0s for each row
					// are removed so the new row is correct.
					for (int arraySize = 0; arraySize < drawingSize; arraySize++) {
						drawEachRow[arraySize] = "*";
					}
				}
				// new line after each row
				System.out.println();
			}

			// keep going?
			System.out.print("Do you want to continue (Y/N)? ");
			keepGoing = input.next().charAt(0);
		}
		System.out.println("Good bye!");
		input.close();
	}
}