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POSudoku Permuter Program Help!! Two Dimensional Arrays (Java?!)
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copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/4207748/help-with-java-sudoku-permuter-program-using-two-dimensional-array">Help With Java Sudoku Permuter Program using Two Dimensional Array?</a> </p> </blockquote> <p>I have to create a program that displays the 9 rows of a sudoku as 9 9-digit numbers and then prompt the user to do one of 6 operations on the sudoku. Then we have to output the sudoku each time the user performs an operation. This is sort of a sample run of how it should go:</p> <pre><code>Welcome to Sudoku Permuter. C C C C C C C C C 1 2 3 4 5 6 7 8 9 R1 0 8 0 4 0 2 0 6 0 R2 0 3 4 0 0 0 9 1 0 R3 9 6 0 0 0 0 0 8 4 R4 0 0 0 2 1 6 0 0 0 R5 2 0 0 0 0 9 6 0 0 R6 0 1 0 3 5 7 0 0 8 R7 8 4 0 0 0 0 0 7 5 R8 0 2 6 0 0 0 1 3 0 R9 0 9 0 7 0 1 0 4 0 (0 denotes a blank) Enter 1 to swap two rows in a panel Enter 2 to swap two columns in a panel Enter 3 to swap two row panels Enter 4 to swap two column panels Enter 5 to swap two numbers Enter 0 to end: </code></pre> <p>Let's say the user enters 3 (to swap two row panels). This would come up:</p> <p>Enter row panels (1-3) to swap: 3 1 It would swap row panels 1 and 3, and this would be the output:</p> <pre><code> C C C C C C C C C 1 2 3 4 5 6 7 8 9 R1 8 4 0 0 0 0 0 7 5 R2 0 2 6 0 0 0 1 3 0 R3 0 9 0 7 0 1 0 4 0 R4 0 0 0 2 1 6 0 0 0 R5 2 0 0 0 0 9 6 0 0 R6 0 1 0 3 5 7 0 0 8 R7 0 8 0 4 0 2 0 6 0 R8 0 3 4 0 0 0 9 1 0 R9 9 6 0 0 0 0 0 8 4 </code></pre> <p>Rows 1-3 have been switched with rows 7-9. Let's say the user inputs 5. This comes up:</p> <p>Enter two numbers: 2 8 The original sudoku is outputted again, except 2's and 8's are switched throughout.</p> <pre><code> C C C C C C C C C 1 2 3 4 5 6 7 8 9 R1 0 2 0 4 0 8 0 6 0 R2 0 3 4 0 0 0 9 1 0 R3 9 6 0 0 0 0 0 2 4 R4 0 0 0 8 1 6 0 0 0 R5 8 0 0 0 0 9 6 0 0 R6 0 1 0 3 5 7 0 0 2 R7 2 4 0 0 0 0 0 7 5 R8 0 8 6 0 0 0 1 3 0 R9 0 9 0 7 0 1 0 4 0 </code></pre> <p>If the user entered 1, something would come up saying</p> <p>Enter two rows (1-9) to switch: And whichever rows the user enters, those two individual rows would be swapped and the sudoku would once again be outputted. It'd be similar if the user entered 2, except 2 columns would be switched. Similarly, if the user entered 4, two column panels would be switched.</p> <p>We're supposed to use a two dimensional array like this:</p> <p>int [] [] sudoku = new int[10] [10]</p> <hr> <p>Ok, I'm sorry it's so long! But here's what I have so far. I'm having trouble with a few things. First, I know how to swap the rows, but since the sudoku was hard coded in, I don't know how to retrieve the numbers. I'm having trouble with arrays in general, so this program is extremely difficult. I've been working on it for at least 2 hours and this is all I have. I also have to print the sudoku before the user is prompted, but I don't know how. I tried to do System.out.println(sudoku), but random characters come up. I also don't know how to display the C1, C2, C3, etc. and the R1, R2, R3, etc. Any suggestions are appreciated! Here's my (probably terrible) code:</p> <p>import java.util.Scanner; public class SudokuPermuter { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("Welcome to Sudoku Permuter.\n");</p> <pre><code> int [] [] sudoku = { { 0, 8, 0, 4, 0, 2, 0, 6, 0 }, { 0, 3, 4, 0, 0, 0, 9, 1, 0 }, { 9, 6, 0, 0, 0, 0, 0, 8, 4 }, { 0, 0, 0, 2, 1, 6, 0, 0, 0 }, { 2, 0, 0, 0, 0, 9, 6, 0, 0 }, { 0, 1, 0, 3, 5, 7, 0, 0, 8 }, { 8, 4, 0, 0, 0, 0, 0, 7, 5 }, { 0, 2, 6, 0, 0, 0, 1, 3, 0 }, { 0, 9, 0, 7, 0, 1, 0, 4, 0 } }; System.out.println(sudoku); System.out.println(); System.out.print("Enter 1 to swap two rows in a panel\n" + "Enter 2 to swap two columns in a panel\n" + "Enter 3 to swap two row panels\n" + "Enter 4 to swap two column panels\n" + "Enter 5 to swap two numbers\n" + "Enter 0 to end: "); int choice = input.nextInt(); if (choice == 1) { System.out.print("Enter 2 rows (1-9) to swap: "); int r1 = input.nextInt(); int r2 = input.nextInt(); } else if (choice == 2) { System.out.print("Enter 2 columns (1-9) to swap: "); int c1 = input.nextInt(); int c2 = input.nextInt(); } else if (choice == 3) { System.out.print("Enter 2 row panels (1-3) to swap: "); int rp1 = input.nextInt(); int rp2 = input.nextInt(); } else if (choice == 4) { System.out.print("Enter 2 column panels (1-3) to swap: "); int cp1 = input.nextInt(); int cp2 = input.nextInt(); } else if (choice == 5) { System.out.print("Enter 2 numbers (1-9) to swap: "); int num1 = input.nextInt(); int num2 = input.nextInt(); } else if (choice == 0) { System.exit(0); } else { System.out.println("Invalid input. Try again"); } } </code></pre> <p>}</p>

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