c#中的圣诞树树干

Question

I'm trying to draw a christmas tree in C# and have managed to draw the actual tree, but im having issues with drawing the trunk in the middle of the tree. The issue is that the trunk is actually printed at the start of the end of the tree and not just straight in the middle.

        static void Main(string[] args)
    {
        // Get's current console window size
        int origWidth = Console.WindowWidth;

        int spaces = origWidth/2;
        int widthOfTree = 1;

        Console.WriteLine("Enter the height of the desired razor tree");
        int treeHeightUserInput = 0;
        while (!int.TryParse(Console.ReadLine(), out treeHeightUserInput))
        {
            Console.WriteLine("Enter a valid number!");               
        }

        // draws tree
        for (int i = 0; i < treeHeightUserInput; i++)
        {
            // indentation
            for (int j = 0; j < spaces; j++)
            {
                Console.Write(" ");
            }
            for (int j = 0; j < widthOfTree; j++)
            {
                Console.Write("* ");
            }
            Console.WriteLine();
            widthOfTree++;
            // reduces width of next line
            spaces--;
        }

        // draws trunk
        for (int i = 0; i < treeHeightUserInput / 3; i++)
        {
            for (int j = 0; j < spaces; j++)
            {
                Console.Write(" ");
            }
            for (int j = 0; j < widthOfTree / 3; j++)
            {
                Console.Write("| ");
            }
            Console.WriteLine();
        }
    }

That's how it looks, I'm not really sure where the issue is as I'm pretty much reusing the same code that I used to draw the tree but just reduced the height and thickness by 2/3. Does anyone have a guess?

Answer 1

So, spaces goes towards 0 in the draws tree loop, which is what makes your tree leaves triangular, but then when you draw the trunk you carry on using spaces as whatever it became when you finished drawing the leaves, meaning your trunk is aligned with the left edge of the leaves (the bottom left of the triangle)

If you want to offset your trunk away from the same indent level as the bottom left corner of the leaves, you'll have to have to increase spaces before you reach this loop:

        // indentation
        for (int j = 0; j < spaces; j++)
        {
            Console.Write(" ");
        }

I'll leave it as an exercise for you to calc a suitable value for spaces before running the indentation loop

Answer 2

spaces is decremented when the top part of the tree is drawn ( spaces-- ). So it's value doesn't match your needs, you have to reset it or increments it (by treeHeightUserInput/3 ) before the loop that draw the trunk.

Answer 3

Thanks to Caius Jard, I was able to somewhat solve the issue. I doubt that it's a clean way to solve it, but it works.

            // draws trunk
        int trunk = origWidth / 2;
        for (int i = 0; i < treeHeightUserInput / 3; i++)
        {
            for (int j = 0; j < trunk - ((widthOfTree + 1) / 3); j++)
            {
                Console.Write(" ");
            }
            for (int j = 0; j < widthOfTree / 3; j++)
            {
                Console.Write("| ");
            }
            Console.WriteLine();
        }