Question

错误'Program.Number'是'type'，但用作'variable

当我尝试运行此程序时，我一直在解决上述错误

using System;

class Program
{
    enum Number{ standard = 1, express = 2, same = 3};

    const int A = 1, B = 2;
    const int Y = 3, N = 4;

    static void Main()
     {

        double cost, LB;
        int numValues, Number_of_items ;

         Console.WriteLine("please enter the type of shiping you want");
        Console.WriteLine("Enter 1:standard shipping.");
        Console.WriteLine("Enter 2:express shipping.");
        Console.WriteLine("Enter 3:same day shipping.");


        switch ((Number))
        { 
            case Numbers.standard:
                Console.WriteLine("thankyou for chooseing standerd shipping");
                Console.WriteLine("please choose a catagory");
                Console.Write("Type A or B to make your selection");
                {      if (A==A)
                {
                    Console.Write("please enter the number of items");
                    Number_of_items = int.Parse(Console.ReadLine());
                    cost = 3 * Number_of_items;

                    Console.Write("is this shipment going to alaska or Hawaii? (y or n)");
                    if (Y==Y)
                    {
                        cost = cost + 2.50;

                        Console.WriteLine("Total cost is {0}." , cost);
                    }
                    else 
                        Console.WriteLine("total cost is {0}." , cost);


                }
                else 
                Console.Write("please enter the weiht in pounds");
               LB =  double.Parse(Console.ReadLine());
                cost = 1.45 * LB;
                Console.WriteLine("is this shipment going to alaska or Hawaii? (y or n)");
        }
                if (Y==Y)
                {
                    cost = cost + 2.50;

                        Console.WriteLine("Total cost is {0}." , cost);
                }
                else 
                        Console.WriteLine("total cost is {0}." , cost);

                break;


                case Numbers.express:
                Console.WriteLine("thankyou for chooseing Express Shipping");
                Console.WriteLine("please choose a catagory");
                Console.Write("Type A or B to make your selection");

                    {       if (A==A)
                        Console.Write("please enter the number of items");
                        Number_of_items = int.Parse(Console.ReadLine());
                        cost = 4 * Number_of_items;
                        {
                    Console.Write("is this shipment going to alaska or Hawaii? (y or n)");
                    if (Y==Y)
                    {
                        cost = cost + 5.00;

                        Console.WriteLine("Total cost is {0}." , cost);
                    }
                    else 
                        Console.WriteLine("total cost is {0}." , cost);


                    }
                     if(B==B) 

                Console.Write("please enter the weiht in pounds");
               LB =  double.Parse(Console.ReadLine());
                cost = 2.50 * LB;
                Console.WriteLine("is this shipment going to alaska or Hawaii? (y or n)");
                    }
                if (Y==Y)
                {
                    cost = cost + 5.00;

                        Console.WriteLine("Total cost is {0}." , cost);
                }
                else 
                        Console.WriteLine("total cost is {0}." , cost);
            break;





                case Numbers.same:
                Console.WriteLine("thankyou for chooseing Same Day Shipping");
                Console.WriteLine("please choose a catagory");
                Console.Write("Type A or B to make your selection");
                if (A == A)
                    Console.Write("please enter the number of items");
                    Number_of_items = int.Parse(Console.ReadLine());
                    cost = 5.50 * Number_of_items;

                    Console.Write("is this shipment going to alaska or Hawaii? (y or n)");
                    if (Y==Y)
                    {
                        cost = cost + 8.00;

                        Console.WriteLine("Total cost is {0}." , cost);
                    }
                    else 
                        Console.WriteLine("total cost is {0}." , cost);



                if (B==B)

                Console.Write("please enter the weiht in pounds");
               LB =  double.Parse(Console.ReadLine());
                cost = 3.00 * LB;
                Console.WriteLine("is this shipment going to alaska or Hawaii? (y or n)");

                if (Y==Y)
                {
                    cost = cost + 8.00;

                        Console.WriteLine("Total cost is {0}." , cost);
                }
                else 
                        Console.WriteLine("total cost is {0}." , cost);

                break;
        }


        numValues = 1; 

















   Console.ReadLine();

    }//End Main()
}//End class Program

Answer 1

错误在于：

switch((Number))

我认为你要向Number施展一些东西，但忘记了。所以我假设你的意思是：

int input;

while(!int.TryParse(Console.ReadLine(), ref input) || input < 1 || input > 3) {
    Console.WriteLine("Please enter a valid option!");
}

switch((Number)input)

Answer 2

您正在启用Number类型，必须使用Number的实例。例如：

switch ((Number)myNumber)

错误'Program.Number'是'type'，但用作'变量'

2 个答案: