获取当前pressed键用C？ [英] Get currently pressed key in C?

问题描述

我需要能够获得当前的字符是没有完全停止程序pssed $ P $。理想情况下，我想程序继续运行，检查while循环的每次迭代后的关键。 残培（）就是这个原因问题。我想打出来时，Q键为pressed while循环，但对于while循环继续运行，直到然后。我使用Linux使用gcc作为我的编译器。

I need to be able to get the current character being pressed without stopping the program entirely. Ideally, I would like the program to continue running, checking for the key after every iteration of a while loop. getch() is problematic for this reason. I want to break out of a while loop when the 'q' key is pressed, but for the while loop to continue running until then. I am using Linux with gcc as my compiler.

推荐答案

在实践中，你应该使用库并这取决于如果你正在编写一个终端应用程序或GUI之一。

In practice, you should use a library and it depends if you are writing a terminal application or a GUI one.

有关的终端应用的，阅读 TTY揭秘页面和使用< A HREF =htt​​ps://www.gnu.org/software/ncurses/> ncurses的或的readline 。注意，在烹调模式（这是默认值的情况下），一个 TTY 的具有内核管理行缓冲器，因此得到一个字符直通 GETC 是不可能的。另请参见的termios（3）和的 TTY（4）和的 tty_ioctl（4）（你可以采取的痛苦在原始模式-eg的设置TTY中的 http://shtrom.ssji.net/skb/getc.html 由 SJR 评论建议 - ，但我建议使用库）

For terminal applications, read the TTY demystified page and use ncurses or readline. Be aware that in cooked mode (which is the default case), a tty has a kernel-managed line buffer, hence getting a single character thru getc is not possible. See also termios(3) and tty(4) and tty_ioctl(4) (you could take the pain the set the tty in raw mode -e.g. as in http://shtrom.ssji.net/skb/getc.html suggested in a comment by sjr-, but I recommend using a library).

有关的图形应用程序的桌面上运行，使用一些工具如 GTK 或<一个HREF =htt​​p://qt.io/> Qt的

For graphical applications running on a desktop, use some toolkit like GTK or Qt.

顺便说一句，在这两种情况下的编程模型是没有用天真的 GETC 功能更兼容。

BTW, in both cases the programming model is no more compatible with the naive getc function.

阅读也高级Linux编程并意识到Linux有几个复用的系统调用（这些在系统调用（2）），尤其是调查（2）首位，而其可能使用的 ncurses的或的readline 或的Qt 或的Gtk 的库。

Read also Advanced Linux Programming and be aware that Linux has several multiplexing system calls (these are listed in syscalls(2)), notably poll(2) -which is probably used by ncurses or readline or Qt or Gtk libraries.

这篇关于获取当前pressed键用C？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！