Question

我一直在设置器上出现零点错误我试图通过将数组的每个点设置为零来修复它，但它仍然无法正常工作。

请帮忙。

public class SudokuArray {

public int[][] sArray;
public int falsecheck = 0; //used as invalid/valid check

public SudokuArray()
{
    int[][] sArray = new int[9][9];
    for (int i=0; i<9; i++)         
        for (int x = 0; x<9; x++) 
            sArray[i][x]=0;
}

public int[][] getArray()
{
    return sArray;
}//end array getter

public void setValue (int value, int column,int row)
{       
    sArray[column][row] = value;
}//ends setter

public void Check()
{
    //row checking
    for (int i = 0; i<9; i++)//decides which row
    {
        for (int x=0; x<9; x++)// decides first point
        {
            for (int y=0; y<9; y++) //decides second point in row
                while (x != y && sArray[i][x] != 0 && sArray[i][y] != 0)// makes sure each point isn't zero (null)
                {                                                       // and making sure its not comparing a point to itself
                    if (sArray[i][x] == sArray[i][y]) 
                        falsecheck = 1;
                }       
        }
    }//ends row check

它切断了代码，所以这里是该课程的其余部分。

//column checking
    for (int i = 0; i<9; i++)//decides which column
    {
        for (int x=0; x<9; x++)// decides first point
        {
            for (int y=0; y<9; y++) //decides second point in column
                while (x != y && sArray[x][i] != 0 && sArray[y][i] != 0)
                    if (sArray[x][i] == sArray[y][i]) 
                        falsecheck = 1;
        }
    }//ends column check

    //3x3 square check
    for (int a = 1; a<4; a++)// check which column the square is in
    {
        for (int b = 1; b<4; b++) // check which row the square is in
            for (int i = 3*a-3; i< 3*a; i++) //which row 1st point
                for (int x = 3*b-3; x< 3*b; x++) //which column 1st point
                {
                    for (int j = 3*a-3; j< 3*a; j++) //which row  1st point
                        for (int y = 3*b-3; y<3*b; y++)
                            while (sArray[i][x] !=0 && sArray[j][y] !=0)
                                while (j != i || y != x)
                                    if (sArray[i][x] == sArray[j][y])
                                        falsecheck = 1;
                }

        }//ends 3x3 square check
    }//ends check

    public int getCheck()
    {
        return falsecheck;
    }// ends getter
}//ends class

import java.util.Random;

public class SudokuMain {

这是主要方法。

    public static void main(String[] args) 
    {
        SudokuArray Sudoku;
        Sudoku = new SudokuArray();
        Sudoku.getArray();
        Random rand = new Random();
        int column,row,value;
        int Amount = rand.nextInt(15) + 15;
        for ( int i= 0; i < Amount + 1; i++) // to assign each variable
        {
            column = rand.nextInt(9); // assigns random column
            row = rand.nextInt(9); //assigns random row
            do { 
                value = rand.nextInt(9); //assigns random value
                Sudoku.setValue(value,column,row); //actually sets the value
                Sudoku.Check();
            } while (Sudoku.getCheck() == 1);           
        }    
    }
}

Answer 1

首先，这是什么语言？我假设C＃，但我不知道。我认为您可能遇到的问题是您使用的是锯齿状数组而不是多维数组。

int[][] sArray = new int[9][9];

不正确。你应该这样做：

int[,] sArray = new int[9,9];

或者这个：

int[][] sArray = new int[9][];

然后单独初始化每个子数组：

sArray[0] = new int[9];
sArray[1] = new int[1];
...
sArray[8] = new int[8];

你可以看到其他人给出了一个很好的解释here

数组的Setter中的空指针错误？

1 个答案: