Question

对于一个类项目，我必须编写一个代码，打印一个由用户指定长度的星号组成的框。我们必须制作两种类型的盒子;基本和对角线。基本的盒子只是一个由星号组成的普通盒子，我已经制作过了。对角线框内部必须有一条对角线，看起来像这样： http://prntscr.com/3fbbot

这是我到目前为止的代码：

public static void main(String[] args) {

    Scanner type = new Scanner(System.in);
    Scanner number = new Scanner(System.in);
    Boolean f = true;
    while (f) {
        System.out.print("Enter a box type, basic or diagonal: ");
        String g = type.nextLine();
        if (g.equals("basic") || g.equals("diagonal")) {
        }
        else {
            continue;
        }
        System.out.print("Enter a number between 2 - 16: ");
        try {
            int boxSize = number.nextInt();
            if (g.equals("basic")) {
                if (boxSize >= 2 && boxSize <= 16) {
                    for (int i = 0; i < boxSize * boxSize;i++) {
                        int row = i / boxSize;
                        int col = i % boxSize;

                        if (row == 0 && col < boxSize-1) {
                            System.out.print("*");
                        }
                        else if (col == 0) {
                            System.out.print("*");
                        }
                        else if (col == (boxSize -1)) {
                            System.out.println("*");
                        }
                        else if (row == (boxSize - 1)) {
                            System.out.print("*");
                        }
                        else {
                            System.out.print(" ");
                        }
                    }
                }
                else {
                    System.out.println("Please use a proper integer.");
                }
                System.out.print("Make another square? Type yes or no: ");
                Scanner answer = new Scanner(System.in);
                if (answer.nextLine().equals("no")) {
                    System.out.print("Thanks for playing!");
                    System.exit(0);
                }
            }
            else {

            }
        }
        catch(Exception e){
            System.out.println("RESETTING. Please type an integer this time.");
        }
    }
}

如果您需要我更具体或需要更多细节，请询问。提前谢谢。

Answer 1

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    while (true) {
        System.out.print("Enter a box type, basic or diagonal: ");
        String g = input.nextLine();
        if (!(g.equals("basic") || g.equals("diagonal"))) {
            continue;
        }

        System.out.print("Enter a number between 2 - 16: ");
        try {
            int boxSize = Integer.parseInt(input.nextLine());
            if (boxSize >= 2 && boxSize <= 16) {
            for (int i = 0; i <boxSize; i++) {
                for (int j = 0; j < boxSize; j++) {
                    if (i == j && g.equals("diagonal")) {
                        System.out.print("*");
                    } else if (i == 0 || i == boxSize-1) {
                        System.out.print("*");
                    } else if (j == 0 || j == boxSize-1) {
                        System.out.print("*");
                    } else {
                        System.out.print(" ");
                    }
                }
                System.out.println();
            }
        } catch(Exception e){
                System.out.println("RESETTING. Please type an integer this time.");
        }

        System.out.print("Make another square? Type yes or no: ");
        if (input.nextLine().equals("no")) {
            System.out.print("Thanks for playing!");
            System.exit(0);
        }
    }
}

Answer 2

Short and sweet answer could be:

    Scanner input = new Scanner(System.in);
    System.out.println("Enter the size of the square: ");
    int n = input.nextInt();

        for(int i=1;i<=n;i++){  
                for(int j=1;j<=n;j++){  
                    if(i>1 && i<n && j>1 && j<n){ 
                        if(i==j){
                            System.out.print(" * ");
                        }else{
                        System.out.print("   ");
                        }  
                    } else{
                        System.out.print(" * ");
                    }
                }  
    System.out.println();
        }

Let me know if somebody else need more help on this. Thank you.

在Java中打印框内的对角线

2 个答案: