Question

我正在尝试调用该方法，但是由于某种原因它无法正常工作有人可以告诉我如何建立更好的方法。

namespace ObjectsLifeTime
{
    class Program
    {
        static void Main(string[] args)
        {

            Car myCar = new Car();
            myCar.Make = "Ford";
            myCar.Model = "Something";
            myCar.Year = 2010;
            myCar.Colour = "Blue";

            Console.WriteLine(myCar.Stats());

        }


        class Car
        {
            public string Make { get; set; }
            public string Model { get; set; }
            public int Year { get; set; }
            public string Colour { get; set; }

            public static string Stats(Car car)
            {
                string restart = "false";
                do
                {
                    restart = "false";
                    Console.WriteLine("Press a to get the Make of the car");
                    Console.WriteLine("Press s to get the Model of the car");
                    Console.WriteLine("Press d to get the Year of the car");
                    Console.WriteLine("Press f to get the Colour of the car");
                }
                while (restart == "true");
                string UserInput = Console.ReadLine();

                if (UserInput == "a")
                {
                    string UserOutput = car.Make;
                    return UserOutput;
                }
                if (UserInput == "s")
                {
                    string UserOutput = car.Make;
                    return UserOutput;
                }
                if (UserInput == "d")
                {
                    string UserOutput = car.Make;
                    return UserOutput;
                }
                if (UserInput == "f")
                {
                    string UserOutput = car.Make;
                    return UserOutput;
                }
                else
                {
                    restart = "true";
                    string UserOutput = "I did not understand that";
                    return UserOutput;
                }
            }
        }
    }
}

Answer 1

您的统计功能是静态的。如果您有意这样做，则可以通过类名Car.Stats（）

进行访问

如果要从Car类的每个实例中访问它，则需要创建一个常规函数（删除静态...）

Answer 2

在面向对象编程中，类是诸如汽车之类的模板。汽车是模板，但例如沃尔沃是汽车的实例。沃尔沃汽车是用汽车的模板制成的，但这只是它的一个实例。在car类中定义的所有属性和功能都可以访问抛出的volvo实例。当谈论静态时，我们真正想说的是，在某些情况下，我们希望能够使用与类的实例无关的函数或属性。让我们假设我们拥有类car。

我们在类车中创建了一个名为gasPrice的静态成员

public class Car 
{ 
   public static double gasPrice =5;
   public string Make { get; set; } 
   public string Model { get; set; } 
   public int Year { get; set; } 
   public string Colour { get; set; } 
}

现在，此属性在car的所有实例之间共享...沃尔沃本田，无论如何...您不能仅对其中一个实例进行编辑。 gasPrice的值由类级别设置...现在，我们无法从其中一个实例访问它了... 我们只能从班级名称访问它，因为它与班级有关！

link for static explained

干杯！

Answer 3

以下代码可以解决您的问题

static void Main(string[] args)
        {

            Car myCar = new Car();
            myCar.Make = "Ford";
            myCar.Model = "Something";
            myCar.Year = 2010;
            myCar.Colour = "Blue";

            Console.WriteLine(myCar.Stats());
            Console.ReadKey();

        }


        public class Car
        {
            public string Make { get; set; }
            public string Model { get; set; }
            public int Year { get; set; }
            public string Colour { get; set; }

            public  string Stats()
            {
                string restart = "false";
                do
                {
                    restart = "false";
                    Console.WriteLine("Press a to get the Make of the car");
                    Console.WriteLine("Press s to get the Model of the car");
                    Console.WriteLine("Press d to get the Year of the car");
                    Console.WriteLine("Press f to get the Colour of the car");
                }
                while (restart == "true");
                string UserInput = Console.ReadLine();

                if (UserInput == "a")
                {
                    string UserOutput = Make;
                    return UserOutput;
                }
                if (UserInput == "s")
                {
                    string UserOutput = Model;
                    return UserOutput;
                }
                if (UserInput == "d")
                {
                    string UserOutput = Year.ToString();
                    return UserOutput;
                }
                if (UserInput == "f")
                {
                    string UserOutput = Colour;
                    return UserOutput;
                }
                else
                {
                    restart = "true";
                    string UserOutput = "I did not understand that";
                    return UserOutput;
                }
            }
        }

没有给出与所需形式参数相对应的参数-这是什么意思？

3 个答案: