格式化要从左到右读取的矩阵

Question

我需要我的矩阵看起来完全像这样。

 Here are the two matrices, and the result when added: 
    2   2   7   4        3   4   3   3        5   6  10   7
    4   4   8   8        6   8   5   5       10  12  13  13
    1   9   3   7        6   8   6   9        7  17   9  16
    2   3   2   9   +    4   4   7   1   =    6   7   9  10
    2   9   1   1        9   8   2   5       11  17   3   6
    6   1   8   4        4   8   2   2       10   9  10   6

每个数字应该在输出中使用 4 个位置，+ 和 = 应该在中间一行，但我无法让 + 和 = 符号留在较小的数组中。我的问题可能出在我的 if (i == 3 && j == 3) 语句上。这部分我的代码如下。

   public static void printResult(int [][]array1, int [][]array2, int[][]sum, char arithmetic)
{
    // Declares 2-dimensional array the same size as one in parameters
    int [][]arraySum = new int [array1.length][array1[0].length];

    // Arithmetic characters to be printed when asked for
    String add = "+";
    String subtract = "-";
    String multiply = "*";
    String divide = "/";
    String remainder = "%";
    String equals = "=";

    // If arithmetic is addition to print matrices and add them to show result
    if (arithmetic == '+') {
        // Text for two matrices when added
        System.out.print("Here are the two matrices, and the result when added:\n");

        // For loop to print array1 + array2 = sum with format
        for (int i = 0; i < arraySum.length; i++) {
            // For loop to print out array 1 and add string
            for (int j = 0; j < arraySum[i].length; j++) {
                System.out.printf("%3s", array1[i][j] + " ");     
                if (i == 3 && j == 3) {
                    System.out.printf("%2s", add);
                }
            }
            System.out.print("\t");

            // For loop to print out array2 and equals string
            for (int k = 0; k < arraySum[i].length; k++) {
                System.out.printf("%3s", array2[i][k] + " ");
                if (i == 3 && k == 3) {
                    System.out.printf("%2s", equals);
                }
            }
            System.out.print("\t");

            // For loop to print out sum of array1 + array2
            for (int l = 0; l < arraySum[i].length; l++) {
                System.out.printf("%3s", sum[i][l] + " ");
            }
            System.out.print("\n");
        }
    }
    else if (arithmetic == '-') {
    }
    else if (arithmetic == '*') {
    }
    else if (arithmetic == '/') {
    }
    else if (arithmetic == '%') {
    }
}

我得到的 3x3 数组的示例。（仍应打印 + 或 =）。

5  3  5      6  7  4    11 10  9
8  2  9      1  5  5     9  7 14
9  7  3      2  5  1    11 12  4

Answer 1

如果矩阵是 3x3，

i 和 j 永远不会是 3。如果你想要 + 和 = 在中间，那么写这样的东西：

if (i == arraySum.length / 2 && j == arraySum[i].length - 1)

Answer 2

尝试if (i == arraySum.length/2 && j == arraySum[i].length-1)。

Answer 3

将if (i == 3 && j == 3) {替换为if (i == (array1 / 2) && j == (array1 / 2)) {

Answer 4

您的问题是在 for 循环中，您在第 4 行 (0,1,2,3) 中添加了加号和等号。当你只有三行时，它不会打印。你可以做些什么让它在中间是这样的：

for (int i = 0; i < arraySum.length; i++) {
    // For loop to print out array 1 and add string
    for (int j = 0; j < arraySum[i].length + 1; j++) {
        System.out.printf("%3s", array1[i][j] + " ");     
        if (i == Math.ceil(arraySum.length/2) && j == arraySum.length) {
            System.out.printf("%2s", add);
        }
    }

它将在数组的中间（高度）和末尾（纵向）打印符号。请注意，它还使用上限函数四舍五入到下一个整数。

格式化要从左到右读取的矩阵

Formatting matrices to be read left to right

java

matrix

bluej