如何为 Switch 语句创建循环，直到用户在 C# 中键入特定单词为止

Question

I am trying to make a "coffee shop" where the console continues to ask the person what they want until they type finish. With the code I included, it asks what you want and then does the while loop once. I am very new to this so any help would be appreciated.

    static void Main(string[] args)
    {
        int totalCost = 0;
        Console.WriteLine("Hi, what would you like to buy?");
        Console.WriteLine("Please type your choice; the menu is coffee, cookie, latte, muffin, tea, and brownie!");
        string food = Console.ReadLine();
        string v = "Thank you, that will cost $";

        do
        {
            food = Console.ReadLine();

            switch (food)
            {
                case "coffee":
                    Console.WriteLine(v + "4");
                    totalCost = totalCost + 4;
                    break;

                case "cookie":
                    Console.WriteLine(v + "2");
                    totalCost = totalCost + 2;
                    break;

                case "latte":
                    Console.WriteLine(v + "5");
                    totalCost = totalCost + 5;
                    break;

                case "muffin":
                    Console.Write(v + "3");
                    totalCost = totalCost + 3;
                    break;

                case "tea":
                    Console.WriteLine(v + "2");
                    totalCost = totalCost + 2;
                    break;

                case "brownie":
                    Console.WriteLine(v + "100");
                    totalCost = totalCost + 100;
                    break;

                case "finish":
                    Console.WriteLine("Your total is $" + totalCost + ". Thank you for your purchase - enjoy!");
                    break;

                default:
                    Console.WriteLine("Hi, what would you like to buy?");
                    Console.WriteLine("Please type your choice; the menu is coffee, cookie, latte, muffin, tea, and brownie!");
                    break;
            }
            break; 
        }

        while (food != "finish");



        Console.Read();
    } 

Answer 1

I modified your code:

static void Main(string[] args)
    {
        int totalCost = 0;
        Console.WriteLine("Hi, what would you like to buy?");
        Console.WriteLine("Please type your choice; the menu is coffee, cookie, latte, muffin, tea, and brownie!");
        string food = "";
        string v = "Thank you, that will cost $";

        do
        {
            food = Console.ReadLine();

            switch (food)
            {
                case "coffee":
                    Console.WriteLine(v + "4");
                    totalCost = totalCost + 4;
                    break;

                case "cookie":
                    Console.WriteLine(v + "2");
                    totalCost = totalCost + 2;
                    break;

                case "latte":
                    Console.WriteLine(v + "5");
                    totalCost = totalCost + 5;
                    break;

                case "muffin":
                    Console.Write(v + "3");
                    totalCost = totalCost + 3;
                    break;

                case "tea":
                    Console.WriteLine(v + "2");
                    totalCost = totalCost + 2;
                    break;

                case "brownie":
                    Console.WriteLine(v + "100");
                    totalCost = totalCost + 100;
                    break;

                case "finish":
                    Console.WriteLine("Your total is $" + totalCost + ". Thank you for your purchase - enjoy!");
                    break;

                default:
                    Console.WriteLine("Hi, what would you like to buy?");
                    Console.WriteLine("Please type your choice; the menu is coffee, cookie, latte, muffin, tea, and brownie!");
                    break;
            }
        }
        while (food != "finish");
        Console.Read();
    } 

This code works as you expect