c++ SFML 按键字符错误

Question

我正在创建一个战舰游戏，我以 A-J x 1-9 的形式输入坐标进行命中，我得到这些并将它们放入列和行变量中，然后在这些坐标处在 2D 数组中输入一个 x。

我的问题是，每当代码进入事件轮询循环时，出于某种原因，它已经认为我按下了一个键并告诉我我已经输入了一行。

我

试图使用我编写的用户输入函数来调试它，但无济于事，

注意：我使用的是按键事件而不是文本输入事件，因为我只需要程序识别 1 个键，

以下是相关代码：

void GetUserInput()
{
        sf::Event Event; // create an event instance
        std::cout << "waiting for input" << std::endl; // output to console     for debugging purposes
        while(bTurnTaken == false)
        {
            while (menu.pollEvent(Event)) // create a polling loop that     polls the event instance
            {
                if(bRowInputted == false) // if the row has not been entered
                {
                    if(Event.type == sf::Event::TextEntered); // if there is     a TextEntered event ( i.e the user enters the coordinates they would like to hit     for their turn)
                    {
                        if(Event.text.unicode >= 32 && Event.text.unicode <= 126) // if what was entered was a valid character
                        {
                            cRow = static_cast<char>(Event.text.unicode); // take what was entered and store it in the variable iRow
                            ConvertRow(); // calls the function to convert the entered row from A-J format to 0-10
                            std::cout << "Row chosen: " << iRowConverted << std::endl; // output to console for debugging
                            bRowInputted = true; // tells the program the row has been inputted so to move on to getting the column
                        }
                    }
                }
                else if(bRowInputted == true) // if the row has been entered
                {
                    if(Event.type == sf::Event::TextEntered); // if there is a TextEntered event ( i.e the user enters the coordinates they would like to hit for their turn)
                   {
                        if(Event.text.unicode >= 32 && Event.text.unicode <= 126) // if what was entered was a valid character
                        {
                            iColumn = static_cast<char>(Event.text.unicode); // take what was entered and store it in the variable iRow
                            iColumn = iColumn - 49; // converts the ascii value of the pressed character into decimal, also changes the entered 1-10 into 0-9
                            std::cout << "Column chosen: " << iColumn << std::endl; // output to console for debugging
                            bTurnTaken = true; // signal the end of the turn as the program now has desired row and column
                        }
                    }
                }
            }
        }
}

Answer 1

if

（Event.type == sf：：Event：：TextEntered）后面的分号，从而有效地跳过了if语句。因此，Event.text.unicode 包含一个不相关的值，在某些情况下，该值会触发以下 if 语句。