术语 else 的无效表达答案

【问题标题】：Invalid expression of term else术语 else 的无效表达
【发布时间】：2014-02-03 19:43:51
【问题描述】：

我正在创建一个井字游戏，对于再次游戏部分，我得到了一个无效的 else 表达，有人可以帮忙吗？在我添加介绍程序之前它起作用了提前致谢

static void playAgainMsg(String message)
    {
        Console.WriteLine(message + "Do you want to play again? Y/N"); // Displaying the resukt of the game and asking the user if they would like to play again and tells them to input Y or N
        if 
        {
            (Console.ReadLine().Equals("Y")) // This reads the line to check the user input
            strPlaysAgain.Equals("Y");
            introduction(); <---- worked before this was added...
        }   
        else
        {
            strPlaysAgain.Equals("N"); // This Changes the value from the default value of Y to N so that it exits the While loop for PlaysAgain.
            Console.Clear(); //Clears the console so that the game board is removed.
            MainMenu();  // returns the user back to the introduction -  edit to be main menu with an exit feature, highscores
        }
    }

【问题讨论】：

标签： c# command-line console console-application

【解决方案1】：

你错了条件

        if (Console.ReadLine().Equals("Y")) //<------------
        {
             // This reads the line to check the user input
            strPlaysAgain.Equals("Y");
            introduction();
        }   
        else
        {
            strPlaysAgain.Equals("N"); // This Changes the value from the default value of Y to N so that it exits the While loop for PlaysAgain.
            Console.Clear(); //Clears the console so that the game board is removed.
            MainMenu();  // returns the user back to the introduction -  edit to be main menu with an exit feature, highscores
        }

【讨论】：

【解决方案2】：

您不会使用 if 测试任何内容。另外，str1.Equals(str2) 是一个测试。您必须使用= 来分配值。

static void playAgainMsg(String message)
        {
            Console.WriteLine(message + "Do you want to play again? Y/N"); 
            if (Console.ReadLine().Equals("Y"))
            {
                strPlaysAgain = "Y";
                introduction();
            }   
            else
            {
                strPlaysAgain = "N"; 
                Console.Clear(); removed.
                MainMenu();  
            }
        }

【讨论】：