C# 程序不工作，控制台输出空白

Question

这里是控制台空白的程序-

using System;
namespace here
{
    class Program
    {
        static void Main(string[] args)
        {
            double width, height, woodLength, glassArea;
            string widthString, heightString;
            widthString = Console.ReadLine();
            width = double.Parse(widthString);
            heightString = Console.ReadLine();
            height = double.Parse(heightString);
            woodLength = 2 * ( width + height ) * 3.25 ;
            glassArea = 2 * ( width * height ) ;
            Console.WriteLine ( "The length of the wood is " + woodLength + " feet" ) ;
            Console.WriteLine( "The area of the glass is " + glassArea + " square metres" ) ;
            Console.ReadKey(true);
        }
    }
}

这是显示输出的程序-

using System;

namespace here
{
    class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            Console.ReadKey(true);
        }
    }
}

我什至尝试卸载我所有的防病毒软件，正如我在其他 post 中读到的那样。没有任何变化。

Answer 1

行 widthString = Console.ReadLine(); 等待，直到在键盘上输入内容并按下 Enter 键。

为程序输入两个值（宽度和高度，用 space 分隔）并按回车键显示输出。

（我假设您是 C# 编程的新手 - 希望这对您有所帮助！）

Answer 2

您的程序正在正确执行。控制台是空白的，因为您没有在提示的开头打印任何内容。试试这个

    using System;
    namespace here {
    class Program
    {
        static void Main(string[] args)
        {
            double width, height, woodLength, glassArea;
            string widthString, heightString;
            Console.WriteLine ("Enter width");
            widthString = Console.ReadLine();
            width = double.Parse(widthString);
            Console.WriteLine ("Enter height");

            heightString = Console.ReadLine();
            height = double.Parse(heightString);
            woodLength = 2 * ( width + height ) * 3.25 ;
            glassArea = 2 * ( width * height ) ;
            Console.WriteLine ( "The length of the wood is " +
                woodLength + " feet" ) ;
            Console.WriteLine( "The area of the glass is " +
                glassArea + " square metres" ) ;
            Console.ReadKey(true);
        }
    }
}

看看这里的输出：

Answer 3

正如 Aniruddha Varma 所说，您正在使用 Console.ReadLine()。这是等待你输入到控制台。如果您输入两个数字，程序就会打印出来。程序暂停，等待您输入内容然后按回车键。然后第二个 Readline 函数做同样的事情。输入两个值后，函数的其余部分将按您预期的方式继续。例如我输入：

    2
    4
    The length of the wood is 39 feet
    The area of the glass is 16 square meters

Answer 4

您的程序可能可以运行，它只是在等待输入。试试这个：

static void Main(string[] args)
{
    Console.WriteLine("Starting program...");   
    double width, height, woodLength, glassArea;
    string widthString, heightString;

    Console.WriteLine("Enter width: ");
    widthString = Console.ReadLine();
    width = double.Parse(widthString);

    Console.WriteLine("Enter height: ");
    heightString = Console.ReadLine();
    height = double.Parse(heightString);

    Console.WriteLine("Calculating...")
    woodLength = 2 * ( width + height ) * 3.25 ;
    glassArea = 2 * ( width * height ) ;
    Console.WriteLine ( "The length of the wood is " + woodLength + " feet" ) ;
    Console.WriteLine( "The area of the glass is " + glassArea + " square metres" ) ;
    Console.ReadKey();
}

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