Question

我正在尝试制作一个菜单，我可以添加一些视频游戏信息，直到我决定退出该程序。到目前为止，我有这个：

    do
    {
        Console.WriteLine("Select the number of your choice: ");
        Console.WriteLine("1: Add a game");
        Console.WriteLine("2: Remove a game");
        Console.WriteLine("3: List games");
        Console.WriteLine("4: Save games");
        Console.WriteLine("5: Read games from file");
        Console.WriteLine("6: Quit");
        Console.Write("Enter the number of your choice: ");
        userChoice = Console.ReadLine();
    } while (!Int32.TryParse(userChoice, out num)); //checks to see if the input is a number
    if (userChoice == "6")
    {
        Environment.Exit(0);
    }

代码在显示选项后停止。我在显示选项后尝试再次显示菜单，以便用户可以选择另一个号码。最终，我希望它看起来像这样：

直到用户输入6并退出程序。为了达到这个目的，我可以做些什么编辑？

Answer 1

要继续循环，你的所有逻辑都必须在里面循环！

    int num;
    string userChoice;

    do
    {
        Console.WriteLine("Select the number of your choice: ");
        Console.WriteLine("1: Add a game");
        Console.WriteLine("2: Remove a game");
        Console.WriteLine("3: List games");
        Console.WriteLine("4: Save games");
        Console.WriteLine("5: Read games from file");
        Console.WriteLine("6: Quit");
        Console.Write("Enter the number of your choice: ");
        userChoice = Console.ReadLine();

        if(!Int32.TryParse(userChoice, out num)) continue;

        if (userChoice == "6")
        {
            Environment.Exit(0);
        }

        Console.WriteLine("Choice = " + userChoice);

        if(userChoice == "1")
        {
            //Some code that will allow me to enter info on some game
        // it will then display the menu again after all questions are answered.
        }

    } while (true);

Answer 2

将if检查放在do while循环中。您正在循环外检查它们，因此没有任何处理。将它们放在do while循环中或将它们放在一个函数中，并在从用户那里获取输入后调用该函数。

Answer 3

你需要从while条件中删除!，如果用户输入6看下面的代码片段，还需要一些打破该循环的方法：

    int num = 0;
    string userChoice = string.Empty;
    do
    {
        Console.WriteLine("Select the number of your choice: ");
        Console.WriteLine("1: Add a game");
        Console.WriteLine("2: Remove a game");
        Console.WriteLine("3: List games");
        Console.WriteLine("4: Save games");
        Console.WriteLine("5: Read games from file");
        Console.WriteLine("6: Quit");
        Console.Write("Enter the number of your choice: ");
        if(num == 6)
            break;
        else
            userChoice = Console.ReadLine();

    }
    while (Int32.TryParse(userChoice, out num)); //checks to see if the input is a number
    if (userChoice == "6")
    {
        Environment.Exit(0);
    }

完整代码为here。

Answer 4

int num;
 string userChoice;
 do
 {
     Console.WriteLine("Select the number of your choice: ");
     Console.WriteLine("1: Add a game");
     Console.WriteLine("2: Remove a game");
     Console.WriteLine("3: List games");
     Console.WriteLine("4: Save games");
     Console.WriteLine("5: Read games from file");
     Console.WriteLine("6: Quit");
     Console.Write("Enter the number of your choice: ");
     userChoice = Console.ReadLine();
 } while (Int32.Parse(userChoice) != 6);

Answer 5

删除＆＃39;！＆＃39;来自while (!Int32.TryParse(userChoice, out num)); Read Documentation。

循环遍历C＃中的菜单项

5 个答案: