Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
Question
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Chapter 6, Problem 5PP
Program Plan Intro

Magic Squares

Program plan:

Filename: “Square.java”

This program file is used to define a class “Square”. In the code,

  • Define a class “Square”.
    • Declare the class members “numbers”, “square” and “size”.
    • Define constructor “Square()”.
      • Initialize “numbers”.
    • Define a method “add()”,
      • Call a method “add()” to add elements to “numbers”.
    • Define a method “rowSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Calculate the row sum and store it in “sum”.
          • Return the value in “sum”.
    • Define a method “columnSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Calculate the column sum and store it in “sum”.
          • Return the value in “sum”.
    • Define a method “diagonalSum()”,
      • Declare a variable “sum”.
      • Iterate a “for” loop,
        • Declare a variable “j”.
        • If true,
          • Set “j” equal to “i”.
        • If false,
          • Set the value of “j”.
        • Calculate the diagonal sum and store it in “sum”.
            • Return the value in “sum”.
    • Define a method “isMagic()”.
      • Calculate the square root of size of “numbers” and store it in “size”.
      • If square of “size” is not equal to size of “numbers”,
        • Return “false”.
            • Iterate loops,
              • Set the value of “square[i][j]”.
            • Iterate a “for” loop,
              • If index of “n” is equal to -1,
                • Return “false”.
                  • Calculate the sum using “diagonalSum()”.
                    • If “sum != diagonalSum(false)” is true,
                      • §  Return “false”.
                    • Iterate a “for” loop,
                      • §  If “sum” not equal to “rowSum(i)”,
                        • ·        Return “false”.
                      • §  If “sum” not equal to “columnSum(i)”,
                        • ·         Return “false”.
                    • Return “true”.

Filename: “MagicSquareDemo.java”

This program file is used to define a class “MagicSquareDemo”. In the code,

  • Import the required packages.
  • Define a class “MagicSquareDemo”.
    • Define the method “main()”.
      • Define the object “in” of class “Scanner”.
      • Define the object “sq” of class “Square”.
      • Prompt the user to enter the sequence of integers.
      • Iterate a “while” loop,
        • Add the element to “sq” using “add()” method.
      • Call “isMagic()” on “sq” and if the result is true,
        • Print that it is magic square.
      • If the result is false,
        • Print that it is not magic square.

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Chapter 6 Solutions

Big Java Late Objects

Ch. 6.2 - Prob. 11SCCh. 6.3 - Prob. 12SCCh. 6.3 - Prob. 13SCCh. 6.3 - Prob. 14SCCh. 6.3 - Prob. 15SCCh. 6.3 - Prob. 16SCCh. 6.3 - Prob. 17SCCh. 6.3 - Prob. 18SCCh. 6.4 - Prob. 19SCCh. 6.4 - Prob. 20SCCh. 6.4 - Prob. 21SCCh. 6.4 - Prob. 22SCCh. 6.4 - Prob. 23SCCh. 6.5 - Prob. 24SCCh. 6.5 - Prob. 25SCCh. 6.5 - Prob. 26SCCh. 6.5 - Prob. 27SCCh. 6.5 - Prob. 28SCCh. 6.6 - Prob. 29SCCh. 6.6 - Prob. 30SCCh. 6.6 - Prob. 31SCCh. 6.6 - Prob. 32SCCh. 6.6 - Prob. 33SCCh. 6.7 - Prob. 34SCCh. 6.7 - Prob. 35SCCh. 6.7 - Prob. 36SCCh. 6.7 - Prob. 37SCCh. 6.7 - Prob. 38SCCh. 6.8 - Prob. 39SCCh. 6.8 - Prob. 40SCCh. 6.8 - Prob. 41SCCh. 6.8 - Prob. 42SCCh. 6.8 - Prob. 43SCCh. 6.8 - Prob. 44SCCh. 6.8 - Prob. 45SCCh. 6 - Prob. 1RECh. 6 - Prob. 2RECh. 6 - Prob. 3RECh. 6 - Prob. 4RECh. 6 - Prob. 5RECh. 6 - Prob. 6RECh. 6 - Prob. 7RECh. 6 - Prob. 8RECh. 6 - Prob. 9RECh. 6 - Prob. 10RECh. 6 - Prob. 11RECh. 6 - Prob. 12RECh. 6 - Prob. 13RECh. 6 - Prob. 14RECh. 6 - Prob. 15RECh. 6 - Prob. 16RECh. 6 - Prob. 17RECh. 6 - Prob. 18RECh. 6 - Prob. 19RECh. 6 - Prob. 20RECh. 6 - Prob. 21RECh. 6 - Prob. 22RECh. 6 - Prob. 23RECh. 6 - Prob. 24RECh. 6 - Prob. 25RECh. 6 - Prob. 26RECh. 6 - Prob. 27RECh. 6 - Prob. 28RECh. 6 - Prob. 29RECh. 6 - Prob. 30RECh. 6 - Prob. 31RECh. 6 - Prob. 32RECh. 6 - Prob. 33RECh. 6 - Prob. 34RECh. 6 - Prob. 1PECh. 6 - Prob. 3PECh. 6 - Prob. 4PECh. 6 - Prob. 5PECh. 6 - Prob. 6PECh. 6 - Prob. 7PECh. 6 - Prob. 8PECh. 6 - Prob. 9PECh. 6 - Prob. 10PECh. 6 - Prob. 11PECh. 6 - Prob. 12PECh. 6 - Prob. 13PECh. 6 - Prob. 15PECh. 6 - Prob. 16PECh. 6 - Prob. 17PECh. 6 - Prob. 18PECh. 6 - Prob. 19PECh. 6 - Prob. 20PECh. 6 - Prob. 21PECh. 6 - Prob. 23PECh. 6 - Prob. 24PECh. 6 - Prob. 25PECh. 6 - Prob. 26PECh. 6 - Prob. 27PECh. 6 - Prob. 28PECh. 6 - Prob. 29PECh. 6 - Prob. 1PPCh. 6 - Prob. 2PPCh. 6 - Prob. 3PPCh. 6 - Prob. 4PPCh. 6 - Prob. 5PPCh. 6 - Prob. 6PPCh. 6 - Prob. 7PPCh. 6 - Prob. 8PPCh. 6 - Prob. 9PPCh. 6 - Prob. 10PPCh. 6 - Prob. 11PPCh. 6 - Prob. 12PPCh. 6 - Prob. 13PPCh. 6 - Prob. 14PPCh. 6 - Prob. 15PPCh. 6 - Prob. 16PPCh. 6 - Prob. 17PPCh. 6 - Prob. 18PPCh. 6 - Prob. 19PP
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