/*
  Number/Word Chart
  written by Keith Fenske
  Sunday, 28 April 2002
  Copyright (c) 2002 by Keith Fenske.  All rights reserved.

  This Java program prints a square chart filled with random numbers and a
  single repeated word (the author's name).  The user is asked for the size
  of the chart.

  This program demonstrates nested "for" loops and the "switch" statement.
*/

import cs1.Keyboard;              // import Lewis/Loftus keyboard class
//                           http://duke.csc.villanova.edu/jss/keyboard.html

public class NumberWord
{
  public static void main(String[] args)
  {
    int column, row;              // index variables in "for" loop
    int length;                   // number of digits to generate
    int number;                   // random number of correct length
    int size;                     // size of the chart

    System.out.print("\nWhat is the size of the chart?  (1 to 10)  ");
    size = Keyboard.readInt();
    if ((size < 1) || (size > 10))
    {
      System.out.println("Sorry, but your size " + size
          + " must be from 1 to 10.");
    }
    else
    {
      for (row = 0; row < size; row ++)
      {
        printLine(size);          // print horizontal line before row
        for (column = 0; column < size; column ++)
        {
          if (row == column)
            System.out.print("|Keith");
          else
          {
            // generate random length from 1 to 5 digits
            length = 1 + (int) (Math.random() * 5);
            // now generate a new random number of the correct length,
            // and print it differently depending upon the length
            switch (length)
            {
              case 1:             // 1-digit numbers from 0 to 9
                number = (int) (Math.random() * 10);
                System.out.print("| (" + number + ") ");
                break;
              case 2:             // 2-digit numbers from 10 to 99
                number = 10 + (int) (Math.random() * 90);
                System.out.print("| " + number + "* ");
                break;
              case 3:             // 3-digit numbers from 100 to 999
                number = 100 + (int) (Math.random() * 900);
                System.out.print("| " + number + " ");
                break;
              case 4:             // 4-digit numbers from 1000 to 9999
                number = 1000 + (int) (Math.random() * 9000);
                System.out.print("|$" + number);
                break;
              case 5:             // 5-digit numbers from 10000 to 99999
                number = 10000 + (int) (Math.random() * 90000);
                System.out.print("|" + number);
                break;
              default:
                System.out.println("error in main(): length = " + length);
            }
          }
        } // end column
        System.out.println("|");  // end output line
      } // end row
      printLine(size);            // print last horizontal line
    }
  } // end main()

/*
  printLine() method

  This method prints one horizontal line in the chart, with the number of
  columns given by the caller.
*/
  private static void printLine(int columns)
  {
    int i;                        // index variable in "for" loop

    for (i = 0; i < columns; i ++)
      System.out.print("+-----");
    System.out.println("+");      // end output line
  }
}