3 на 3 матрица Sudoku stye

Question

Я хочу создать матрицу 3 на 3 чисел 1, 2, 3. Каждая цифра должна отображаться ровно один раз в каждом сыром и столбце (стиль судоку).

Я знаю, как создать первую строку:

из случайной выборки импорта печати (образец (диапазон (0, 3), 3))

, но понятия не имеют, как продолжить здесь. ..

спасибо.

Answer 1

import java.util.Scanner; 

public class Sudoku { 
    public int[][] grid; 

    Sudoku(){ 
     grid = new int[3][3]; //empty 
    } 

    Sudoku(String start){ 
     grid = new int[3][3]; 
     for(int x = 0; x <3; x++){ 
      for(int y =0; y<3; y++){ 
       grid[x][y] = 0; 
      } 
     } 

     grid[0][0] = 1; //top left most 
     grid[0][1] = 3; 
     //grid[0][2] = 2; 
     grid[1][0] = 3; 
     grid[1][1] = 2; 
     grid[1][2] = 1; 
     grid[2][1] = 1; 
     grid[2][2] = 3; 
    } 

    public void printMySudoku(){ 
     for (int i = 0; i < 3; ++i) { 
      if (i % 1 == 0) 
       System.out.println(" -----------------------"); 
      for (int j = 0; j < 3; ++j) { 
       if (j % 1 == 0) System.out.print("| "); 
       System.out.print(grid[i][j] == 0 
         ? " " 
           : Integer.toString(grid[i][j])); 

       System.out.print(' '); 
      } 
      System.out.println("|"); 
     } 
     System.out.println(" -----------------------"); 

    } 
    public boolean insertVal(int row, int col, int myVal){ 
     System.out.println("Entered insertVal " + "row " + row + "  column " + col + " myVal " + myVal); 
     if(checkRow(row, col, myVal) == false) 
      return false; 

     if(checkCol(row, col, myVal) == false) 
      return false; 

     if(checkBox(row, col, myVal) == false) 
      return false; 

     grid[row][col] = myVal; 


     return true; 

    } 
    public boolean removeVal(int row, int col, int myVal) { 
     //grid[row][col] = 0; 

     return true; 
    } 
    private boolean checkRow(int row, int col, int myVal) { 
     for (int a = 0; a < 3; ++a) // row 
      if (myVal == grid[row][a]){ 
       System.out.println(myVal + " Already in Row: " + row); 
       return false; 
      } 
     return true; 

    } 
    private boolean checkCol(int row, int col, int myVal) { 
     for (int b = 0; b < 3; ++b) // column 
      if (myVal == grid[b][col]){ 
       System.out.println(myVal + " Already in Column: " + col); 
       return false; 
      } 
     return true; 

    } 

    public boolean checkBox(int row, int col, int myVal) { 
     int boxRowOffset = (row/3)*3; 
     int boxColOffset = (col/3)*3; 
     for (int c = 0; c < 3; ++c) // box 
      for (int d = 0; d < 3; ++d) 
       if (myVal == grid[boxRowOffset+c][boxColOffset+d]){ 
        System.out.println(myVal + " Already in Box "); 
        return false; 
       } 
     return true; 

    } 




    public static void main(String args[]){ 

     Sudoku i = new Sudoku("start"); 
     i.printMySudoku(); 
     @SuppressWarnings("resource") 
     Scanner guess = new Scanner(System.in); 

     int row, col, val; 
     String action; 

     while(true){ 
      System.out.println("Enter I for insert or R for remove: "); 
      action = guess.next(); 

      System.out.println("Row: "); 
      row = guess.nextInt(); 
      System.out.println("Column: "); 
      col = guess.nextInt(); 
      System.out.println("Value: "); 
      val = guess.nextInt(); 

      if(action.equals("I")){ 
       if(i.insertVal(row, col, val)){ 
        System.out.println("Good Job "); 
       } 
       else System.out.println("Try Again "); 
       i.printMySudoku(); 
      } 
      else{ i.removeVal(row, col, val); 
      i.printMySudoku();} 

     } 
    } 
}