Question

我正在一个项目，该项目根据用户输入的值创建一个简单的周长和面积计算器。（用于查找窗口周长和玻璃区域）。但是，我遇到了4个错误，所有错误均为CS0103。谁能帮助我修复这些错误或清理代码。我正在尝试将所有内容分离为方法，因此我想将代码保留为该常规格式。

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

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            double totalLength, totalWidth, windowPerimeter, glassArea;

            //display instructions
            DisplayInstructions();

            // ask for width
            totalWidth = AskDimension();

            //ask for lenght
            totalLength = AskDimension();

            // calculate window Perimeter
            windowPerimeter = (2 * totalWidth) * (2 * totalLength);

            //calculate the area of the window & display output
            glassArea = totalWidth * totalLength;

            //calculate and display outputs

            Console.WriteLine("the lenth of the wood is " + windowPerimeter + " feet");
            Console.WriteLine("the area of the glass is " + glassArea + " square feet");
            Console.ReadKey();

            Console.ReadKey();
        }

        //display instructions
        public static void DisplayInstructions()
        {
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("This app will help you calculate the amount of wood and glass needed for your new windows!");
            Console.WriteLine("   ");
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("*Note* Please enter a height/width value between 0.01 - 100, all other values will cause a system error.");
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("   ");
        }

        //ask for width
        public static double AskDimension()
        {
            double totalWidth;
            const double MAX_HEIGHT = 100.0;
            const double MIN_Height = 0.01;
            string widthString;
            Console.WriteLine("please enter your height of the window");
            widthString = Console.ReadLine();
            totalWidth = double.Parse(widthString);
            if (totalWidth < MIN_Height)
            {
                Console.WriteLine("you enter vaule less than min width \n" + "using minimum one");
                totalWidth = MIN_Height;
            }
            if (totalWidth > MAX_HEIGHT)
            {
                Console.WriteLine("you enter value grater than Max height\n" + "using maximum one");
                totalWidth = MAX_HEIGHT;
            }

            return AskDimension();
        }

        //ask for height
        public static double AskDimension(string dimension)
        {
            double totalLength;
            const double MAX_HEIGHT = 100.0;
            const double MIN_Height = 0.01;
            string heightString;
            Console.WriteLine("please enter your height of the window");
            heightString = Console.ReadLine();
            totalLength = double.Parse(heightString);
            if (totalLength < MIN_Height)
            {
                Console.WriteLine("you enter vaule less than min width \n" + "using minimum one");
                totalLength = MIN_Height;
            }
            if (totalLength > MAX_HEIGHT)
            {
                Console.WriteLine("you enter value grater than Max height\n" + "using maximum one");
                totalLength = MAX_HEIGHT;
            }

            return AskDimension();
        }
        //calculate and display outputs
        public static double AskDimesnion(string windowPerimeter,
                                          string glassArea,
                                          string widthString,
                                          string heightString)

        {

            windowPerimeter = 2 * (totalWidth + totalLength);
            glassArea = (totalWidth * totalLength);
            Console.WriteLine("the lenth of the wood is " + windowPerimeter + " feet");
            Console.WriteLine("the area of the glass is " + glassArea + " square feet");
            Console.ReadKey();
            return AskDimension();
        }
}
}

方法错误的屏幕截图： Screenshot of errors in the method

Answer 1

您的totalWidth变量未在范围内的任何位置定义。应该在某处定义。根据您确切要定义的位置，可以在内部使用 AskDimension 方法，也可以在更全局的范围内进行定义。从您的逻辑看来，它应该是方法的输入参数。另外，您的代码中还有其他错误。您的方法名为 AskDimesnion ，但是您正在代码中通过 AskDimension 调用它（希望正确的方法名称。 ..）

对于可变范围，您可以检查Microsoft's own documentation

Answer 2

最初的问题是您的变量未在类范围内，而且计算对我来说似乎有点疯狂。但是从将您的代码粘贴到我的编辑器中之后，我进行了快速整理，并得出以下结果：

using System;

namespace TestConsoleApplication
{
    class Program
    {
        static double _totalLength, _totalWidth, _windowPerimeter, _glassArea;

        static void Main(string[] args)
        {
            DisplayInstructions();
            _totalWidth = AskDimension("Height");
            _totalLength = AskDimension("Width");
            _windowPerimeter = (2 * _totalWidth) + (2 * _totalLength);
            _glassArea = _totalWidth * _totalLength;
            Console.WriteLine("The length of the wood is " + _windowPerimeter + " feet");
            Console.WriteLine("The area of the glass is " + _glassArea + " square feet");
            Console.ReadKey();
        }

        private static void DisplayInstructions()
        {
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("This app will help you calculate the amount of wood and glass needed for your new windows!");
            Console.WriteLine();
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("*Note* Please enter a height/width value between 0.01 - 100, all other values will cause a system error.");
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine();
        }

        private static double AskDimension(string dimensionType)
        {
            const double maxDimension = 100.0;
            const double minDimension = 0.01;

            Console.WriteLine($"Please enter your {dimensionType} of the window");

            var dimensionString = Console.ReadLine();
            var dimension = double.Parse(dimensionString);

            if (dimension < minDimension)
            {
                DisplayDimensionErrorAndExit("Min");
            }
            else if (dimension > maxDimension)
            {
                DisplayDimensionErrorAndExit("Max");
            }

            return dimension;
        }

        private static void DisplayDimensionErrorAndExit(string dimensionToShow)
        {
            Console.WriteLine($"You entered a value less than {dimensionToShow} dimension");
            Console.WriteLine("Press any key to exit");
            Console.ReadKey();
            Environment.Exit(0);
        }
    }
}

如果用户输入了无效的输入，则程序将终止，除了可以进行计算并显示正确的输出。如果您对此有任何疑问，请问我：-）

如何在Visual Studio 2017中修复C＃错误cs0103？

2 个答案: