C ++ - 使事件循环 [英] C++ - Making an event loop

问题描述

有没有人知道如何在没有库的情况下在c ++中进行事件循环？它不一定是跨平台的，我在Mac上。基本上，我想让程序运行，直到用户按下向上箭头键，然后程序将输出你按下或什么。所有我可以想到的是有一个无限的而或为循环，并获得输入与 cin ，但我不认为 cin 可以检测箭头键，我相信它会暂停程序，直到达到'\\\
';

我希望它看起来像这样：

  void RUN ）
 {
 while（true）
 {
 //投票事件，如果需要可以做某事
} 
} 
 
 int main（）
 {
 RUN（）; 
} 
  

我确信没有线程是可能的，我听说过这可以通过 fd_set 或某些东西来实现，但我不知道如何。

任何帮助将是真的

编辑：

程序 >在没有任何事件的情况下运行在后台。例如，Microsoft Word不会停止，直到用户按下一个按钮，它不断运行。我想要这样的东西，但命令行不是GUI。

解决方案

你可以使用 ncurses 并启用 cbreak 获取原始输入流。

Does anyone know how to make an event loop in c++ without a library? It doesn't have to be cross-platform, I'm on a Mac. Basically, I want the program to run and do nothing until the user presses the up arrow key, then the program will output "You pressed up" or something. All i can think of is having an infinite while or for loop and get input with cin, but I don't think cin can detect arrow keys and I believe it pauses the program until it reaches a '\n';

I would want it to look like this:

void RUN()
{
   while(true)
   {
      // poll events and do something if needed
   }
}

int main()
{
   RUN();
}

I'm kinda sure it's possible without threads, and I've heard that this can be accomplished with fd_set or something, but I'm not sure how.

Any help would be really appreciated.

EDIT:

The program has to run in the background when there aren't any events. For example, Microsoft Word doesn't stop until the user presses a button, it keeps running. I want something like that, but command-line not GUI.

解决方案

You can use ncurses and enable cbreak to get the raw input stream.

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