For循环星号和加号（矩形形式）

Question

我想编写一个程序，让用户输入矩形的高度和宽度，但交替使用 * 和 +。这是我的代码：

class Parallelogram {
    public static void main(String[] args) {
        Scanner x = new Scanner(System.in);
        int w;
        int h;

        System.out.print("Enter the Width ");
        w = x.nextInt();
        System.out.print("Enter the height ");
        h = x.nextInt();

        for (int i = 0; i < h; i++) {
            for (int j = 0; j < w; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

输出：

MY PROGRAM :                   What i want my program to look
Enter width : 4                 Enter width : 4
Enter height : 5                Enter height : 5
****                            ****
****                            ++++
****                            ****
****                            ++++
****                            ****

Answer 1

只需在您的 for 循环中添加一个模数。

此代码将为您解决问题：

public static void main(String[] args) {
    Scanner x = new Scanner(System.in);
    int w;
    int h;
    System.out.print("Enter the Width ");
    w = x.nextInt();
    System.out.print("Enter the height ");
    h = x.nextInt();
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            if (i % 2 == 0) {
                System.out.print("*");
            } else {
                System.out.print("+");
            }
        }
        System.out.println();
    }
}

For循环星号和加号（矩形形式）

For loop asterisk and plus sign (Rectangle form)

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