Question

我想使用0计算数组中的零（countCellsToFill()）数。我尝试使用返回的count+1进行循环。但它没有出现在输出中。任何人都可以帮我完成这个。

public class Sudoku{

public static void main(String... args) throws Exception
{
    Scanner scanner = new Scanner(System.in);        
    int[][] sudokuPuzzle = {    
                         {8, 1, 0, 0, 0, 0, 0, 3, 9},       
                         {0, 0, 0, 9, 0, 1, 0, 0, 0},                                                                                       
                         {3, 0, 5, 0, 0, 0, 4, 0, 1},
                         {0, 0, 9, 8, 0, 2, 7, 0, 0},
                         {0, 0, 0, 5, 0, 6, 0, 0, 0},
                         {0, 0, 4, 3, 0, 7, 1, 0, 0},
                         {1, 0, 8, 0, 0, 0, 9, 0, 2},
                         {0, 0, 0, 6, 0, 4, 0, 0, 0},
                         {2, 4, 0, 0, 0, 0, 0, 6, 5}
                    };  
    printSudoku(sudokuPuzzle);
}
 public static void printSudoku(int[][] sudokuPuzzle)
 {
  for (int i = 0; i < sudokuPuzzle.length; i++)
    {
        if (i == 3 || i == 6)
            System.out.println("------------------------");
        for (int j = 0; j < sudokuPuzzle[i].length; j++)
        {
            System.out.format("%-2s", sudokuPuzzle[i][j]);
            if (j == 2 || j == 5 )
                System.out.print(" | ");
        }           
        System.out.println();   
    }      
}
}

Answer 1

for(int i=0; i<sudokuPuzzle.length; i++) {
    for(int j=0; j<sudokuPuzzle[i].length; j++) {
        if(sudokuPuzzle[i][j] == 0){
            count++;
        }

    }
}

只需循环并计算0个单元格？

Answer 2

public static int countCellsToFill(int[][] arr){
    int count=0;
    for(int[] r : arr){
        for(int a: r){
            if(a == 0){
                count++;
            }
        }
    }
    return count;
}

最后的主要方法：

public static void main(String... args) throws Exception
{
    //......

    printSudoku(sudokuPuzzle);
    int count = countCellsToFill(sudokuPuzzle);
    System.out.println("Num of zeros: " + count);
}

在数独中计算零

2 个答案: