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Chapter 7, Problem 20PC
Program Plan Intro

Lo Shu Magic Square

Program Plan:

  • Import the required packages.
  • Declare the class “Main”.
    • Declare the “main ()” method.
      • Declare two 2-Dimensional arrays.
      • Call the function “show_Array ()” to display the array.
      • Call the function “show_Result ()” to display the result.
    • Give function definition for “show_Result ()”.
      • Check if the square is a magic square by calling the function “isMagicSquare ()”.
        • If yes, then print the positive message.
      • Else,
        • Print the negative message.
    • Give function definition for “show_Array ()” to display the array.
      • Using nested “for” loops, print the values of the array.
    • Give function definition for “isMagicSquare ()”.
      • Declare a Boolean variable.
      • Call the function “check_Range ()”, “checkUnique ()”, “checkRowSum ()”, “check_ColSum ()”, and “check_DiagSum ()”.
      • Check the condition “is_InRange && is_Unique && is_EqualRows &&is_EqualCols && is_EqualDiag”.
        • Assign “true” to the Boolean variable.
      • Return the variable.
    • Give function definition for “check_Range ()”.
      • Declare required variables.
      • Using nested “for” loops, check the condition “array[row][col] < MIN || array[row][col] > MAX”.
        • Assign “false” to the Boolean variable.
      • Return the variable.
    • Give function definition for “check_Unique ()”.
      • Declare required variables.
      • Using the while condition “searchValue <= MAX && status == true”.
        • Using nested  “for” loops,
          • Check the condition “array[row][col] == searchValue”,
            • Increment the counter variable.
          • Check if count value is greater than 1.
            • Assign “false” to the Boolean variable.
        • Increment the variable “searchValue”.
        • Assign 0 to the counter variable.
      • Return the status.
    • Give function definition for “check_RowSum ()”.
      • Declare a variable.
      • Calculate the sum of 1st row, 2nd row and 3rd row.
      • Check if all the values are not equal to each other.
        • Assign “false” to the Boolean variable.
      • Return the variable.
    • Give function definition for “check_ColSum ()”.
      • Declare a variable.
      • Calculate the sum of 1st column, 2nd column and 3rd column.
      • Check if all the values are not equal to each other.
        • Assign “false” to the Boolean variable.
      • Return the variable.
    • Give function definition for “check_DiagSum ()”.
      • Declare a variable.
      • Calculate the sum of 1st diagonal, and 2nd diagonal.
      • Check if all the values are not equal to each other.
        • Assign “false” to the Boolean variable.
      • Return the variable.

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Chapter 7 Solutions

MyLab Programming with Pearson eText -- Access Code Card -- for Starting Out with Java: From Control Structures through Objects

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