Finding the whitespace algorithm for a tentative size ASCII art program

问题

So I've been tasked with making a "Programming textbook" that can change size based off what the constant SIZE var is set at.

Here is what I have to shoot for. (NOTE: It is normal for odd-number SIZEd books to have awkward indentation towards the end). Notice how when SIZE = 8, there is one space on either side of the text, 4 spaces on either side for SIZE = 10, and so on.

Now here is what I've programmed so far. I'm almost done, the only thing I cannot figure out is the algorithm I can use to keep consistent spacing for the "label" of the book (Building Java Programs text). The commented out "TO DO" lines are where I intend to put the label of the book once I figure out the spacing

(Note: Focus on the bottomBook method. The other two methods are fine)

package bookdrawing;
public class BookDrawing
{
    public static final int SIZE = 8;
    public static void main(String[] args)
    {
        topBook();
        bottomBook();
    }

    public static void topBook()
    {
        //Drawing the VERY top of the book (before starting all the loops)
        for(int i = 1; i <= SIZE + 1; i++)
        {
            System.out.print(" ");

        }
        drawLine();
        System.out.println();

        //Main portion. Looping to draw all spaces, '/'s, '__/'s, etc.
        for(int i = 1; i <= SIZE; i++)
        {
            //front whitespaces
            for(int j = 1; j <= -1 * i + (SIZE + 1); j++)
            {
                System.out.print(" ");
            }

            //Leftmost border
            System.out.print("/");

            //Inner whitespaces
            for(int j = 1; j <= -3 * i + (SIZE * 3); j++)
            {
                System.out.print(" ");
            }

            //Additional "_" that starts off every row
            System.out.print("_");
            //"__/" pattern
            for(int j = 1; j <= i; j++)
            {
                System.out.print("__/");
            }

            //Right side of book (/'s)
            for(int j = 1; j <= i - 1; j++)
            {
                System.out.print("/");
            }

            //Move onto the next row of book drawing
            System.out.println();
        }

    }

    private static void drawLine()
    { 
        System.out.print("+");
        //This loop grows/shrinks line body depending on value of SIZE
        for(int i = 0; i <= (SIZE * 3) - 1; i++)
        {
            System.out.print("-");
        }
        System.out.print("+");
    }

    public static void bottomBook()
    {
        //Dash line on top of the bottom portion of the book
        drawLine();

        //Printing first set of rightmost "/"'s
        for(int i = 1; i <= SIZE; i++)
            System.out.print("/");
        System.out.println();

        for(int i = 1; i <= SIZE / 2; i++)
        {
            //Leftmost pipe
            System.out.print("|");

//            TO DO: Code label of book
//            for(int j = 1; j <= ; j++)
//            {
//                
//            }


            //Rightmost pipe
            System.out.print("|");

            //"Pages" to right of label
            for(int j = 1; j <= -2 * i + (SIZE + 2); j++)
            {
                System.out.print("/");
            }

            //Move to draw next row
            System.out.println();
        }

        //Dash line on very bottom of entire drawing
        drawLine();
    }
}

And here is what my current output looks like. (The forward slash algorithm is correct, all I need to insert is the label with the correct spacing)

So what would be a good algorithm be to keep the label spacing consistent with everything else?

来源：https://stackoverflow.com/questions/54684014/finding-the-whitespace-algorithm-for-a-tentative-size-ascii-art-program

标签

java

ascii-art