Question

您好我的问题是代码在屏幕上打印但是当文本到达命令行的一侧时它崩溃了。如何限制在第10行和第30行内写入的文本。在代码中，我在IF语句中创建了一个IF语句，以测试变量Y是否为= 10或=到30，这样就限制了屏幕上的文本，但它不起作用。有帮助吗？感谢

代码：

    static void Main(string[] args)
    {
        Menu();
    }

    static void Menu()
    {
        Random random = new Random();

        sbyte X = 1;

        sbyte Y = 20;

        while (true)
        {

             float randomNumber = random.Next(0, 100);

            if (randomNumber <50)
            {
                if (Y >= 10)
                {
                    Y = Y;
                }
                else
                {
                    Y++;
                }

            }
            else if (randomNumber >50)
            {
                if (Y >= 30)
                {
                    Y = Y;
                }
                else
                {
                    Y--;
                }

            }

            X++;

            PrintToScreendynamic(X, Y, "-");


            Thread.Sleep(200);

        }

    }

    static void PrintToScreendynamic(sbyte X, sbyte Y, string text)
    {

        Console.SetCursorPosition(X, Y);

        Console.Write(text);

    }

}

Answer 1

好的，我已经运行了你的代码并清理了一下。

包括评论。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
class Program
{
    static void Main(string[] args) {
        Menu();
    }

    static void Menu() {

        //The console starts at the top-left corner from point 0,0 (row 0, column 0).
        //To find the number of columns, use the property Console.BufferWidth.
        //This returns the number of characters which can be displayed on a single line from left to right.
        //For example, If the number of columns is 80, the columns are numbered from 0 to 79, so the highest possible value of X is 79.
        int MaxWidth = Console.BufferWidth - 1;

        Random random = new Random();
        sbyte X = 1;
        sbyte Y = 20;
        float randomNumber;


        /**
         Don't use a loop which says while(true), or you will have to do tests inside the loop
         to see where it should end.
         We know how many columns the console has, so stop the loop when X is too big to increment
         within that limit.
         */
        while (X < MaxWidth) {
            randomNumber = random.Next(0, 100);

            /**
            You only need to check for a condition that will cause a change.
            If you have a check which results in Y = Y, you're adding code that won't be run.
            So, instead of saying if (y >= 10) { Y = Y } else { do something },
            flip it around and say if ( y <= 10 ) { do something } 
             * **/
            if (randomNumber < 50) {
                //If Y is greater than or equal to 10, make Y smaller by 1.
                //This prevents the cursor from moving to a line closer
                //to the top of the console than Line 10.
                if (Y >= 10) {
                    Y--;
                }
            } else if (randomNumber > 50) {
                //If Y is less than or equal to 30, make Y largerby 1.
                //This prevents the cursor from moving to a line closer
                //to the bottomof the console than Line 30.
                if (Y <= 30) {
                    Y++;
                }
            }

            X++;

            PrintToScreendynamic(X, Y, "-");
            Thread.Sleep(200);
        }
    }

    static void PrintToScreendynamic(sbyte X, sbyte Y, string text) {
        Console.SetCursorPosition(X, Y);
        Console.Write(text);
    }
}

}

如何编写循环代码来更改屏幕上文本的位置

1 个答案: