java - 将二维数组元素从一个复制到另一个

Question

我想从 n x n 矩阵中找到辅助矩阵，

例如矩阵是 4x4

{0,  11, 15, 11},
{7,  0, 1 , 8},
{4, 19, 0 , 6},
{2, 3, 5, 0}  

这是我的输出

矩阵一

Loop: 1
0 1 8 19 0 6 3 5 0 
Loop: 2
7 1 8 4 0 6 2 5 0 
Loop: 3
7 0 8 4 19 6 2 3 0 
Loop: 4
7 0 1 4 19 0 2 3 5 
Loop: 5
11 15 11 19 0 6 3 5 0 
Loop: 6
0 15 11 4 0 6 2 5 0 
Loop: 7
0 11 11 4 19 6 2 3 0 
Loop: 8
0 11 15 4 19 0 2 3 5 
Loop: 9
11 15 11 0 1 8 3 5 0 
Loop: 10
0 15 11 7 1 8 2 5 0 
Loop: 11
0 11 11 7 0 8 2 3 0 
Loop: 12
0 11 15 7 0 1 2 3 5 
Loop: 13
11 15 11 0 1 8 19 0 6 
Loop: 14
0 15 11 7 1 8 4 0 6 
Loop: 15
0 11 11 7 0 8 4 19 6 
Loop: 16
0 11 15 7 0 1 4 19 0 

我将这些值存储到另一个 2darray(matrixTwo) 中来计算行列式以找到逆矩阵，但发现我的矩阵 2 中存储的内容与上面的输出不同。为什么存储的值不同？请帮忙

Matrix Two
Loop: 1
0 11 15 11 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 2
7 0 1 8 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 3
4 19 0 6 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 4
2 3 5 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 5
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 6
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 7
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 9
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 10
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 11
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 12
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 13
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 14
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 15
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
Loop: 16
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0      

我的代码

public class Matrix {
    public static void main(String argv[]) {
        int matrix[][]= { {0,  11, 15, 11},
                           {7,  0, 1 , 8},
                           {4, 19, 0 , 6},
                           {2, 3, 5, 0} 
        };

        int matrixTwo[][] = new int[(matrix.length) * (matrix.length)][(matrix.length) * (matrix.length)];
        int ctr = 0;
        System.out.println("Matrix One");
        for(int i = 0; i < matrix.length; i++) {
            for(int j = 0; j < matrix.length; j++) {
                ctr++;
                System.out.println("\nLoop: " + ctr);
                for(int row = 0;row < matrix.length; row++) {
                    for(int col = 0; col < matrix[row].length; col++) {
                                    if(row != i && col != j) {
                                System.out.print(matrix[row][col] + " ");
                            matrixTwo[row][col] = matrix[row][col];
                    }
                }
            }           
        }
    }

    int ctrTwo = 0;
    System.out.println("\n\nMatrix Two");
    for(int row = 0; row < matrixTwo.length; row++) {
        ctrTwo++;
        System.out.println("Loop: " + ctrTwo);
        for(int col = 0; col < matrixTwo.length; col++) {
            System.out.print(matrixTwo[row][col] + " ");
        }
        System.out.println();
    }
}

Answer 1

这些是不同的，因为它们以不同的顺序打印

举个例子，

从矩阵一

Loop: 1
0 1 8 19 0 6 3 5 0 

打印

Loop: 1
matrix[1][1] = 0 matrix[1][2] = 1 matrix[1][3] = 8 matrix[2][1] = 19 matrix[2][2] = 0 matrix[2][3] = 6 matrix[3][1] = 3 matrix[3][2] = 5 matrix[3][3] = 0 

来自矩阵Two

Loop: 1
0 11 15 11 0 0 0 0 0 0 0 0 0 0 0 0 

打印

Loop: 1
matrixTwo[0][0] = 0 matrixTwo[0][1] = 11 matrixTwo[0][2] = 15 matrixTwo[0][3] = 11 matrixTwo[0][4] = 0 matrixTwo[0][5] = 0 matrixTwo[0][6] = 0 matrixTwo[0][7] = 0 matrixTwo[0][8] = 0 matrixTwo[0][9] = 0 matrixTwo[0][10] = 0 matrixTwo[0][11] = 0 matrixTwo[0][12] = 0 matrixTwo[0][13] = 0 matrixTwo[0][14] = 0 matrixTwo[0][15] = 0 

使用System.out.print(“matrix[”+row+“][”+col+“]=”+matrix[row][col]+“”);。你可以看到差异