使用输入功能在Linux下C，没有pressing进入 [英] using input function in C on linux, without pressing enter

问题描述

我写了一个code在Windows上，使用功能残培（）从 STDIO 。事情是我必须使用不需要pressing输入输入功能。

I wrote a code on windows, using the function getch() from stdio. The thing is I have to use an input function that does not require pressing enter.

我的code编译和完美的作品上的窗口。然而，这个任务已经在Linux上运行，当我尝试这样做，它告诉我它不承认残培（）（或 _getch （））。
现在的问题是，根据分配，我不能用其他的包括但 stdio.h中（以及同样为把一个标志），所以我不能使用 curses.h里来解决这个问题。

My code compiles and works perfectly on windows. However, this assignment has to run on linux, and when I try to do so, it tells me it does not recognize getch() (or _getch()). The problem is that according to the assignment, I can not use other includes but stdio.h (and same goes for adding a flag), so I can not use curses.h to solve this.

我也不能使用 termios.h 等等，我们还没有学会它。
我怎样才能解决这个问题？是否还有其他选择吗？

I also can not use termios.h and so on, we have not learned it. How can I solve this? Are there any other options?

感谢

推荐答案

在UNIX系统图书馆的做法是对我们 ncurses的的，但它是一个有点框架，并非易如反掌成立的。非库方式是把标准输入流中的非规范的使用输入模式 tcgetattr（）和 tcsetattr （）与文件描述符 0 。键入从内存中必要的code（即我现在不能测试它，我可能忘了一些重要的东西）对应的code看起来是这样的：

The library approach on UNIXes is to us ncurses but it is a bit of a framework which isn't entirely trivial to set up. The non-library mode is to turn the standard input stream into non-canonical input mode using tcgetattr() and tcsetattr() with the file descriptor 0. Typing the necessary code from memory (i.e., I can't test it now and I probably forgot something important) the corresponding code looks something like this:

struct termios setings;
tcgetattr(0, &settings);
settings.c_lflags &= ~ICANON;
tcsetattr(0, &settings);

显然，真正的实现将验证系统调用实际上是成功的。请注意，这code 之后的std :: CIN 和标准输入将立即对重点presses反应。作为一个直接后果，所有类型的搞笑的字符将被通过。例如，当Delete键使用你会看到退格字符（CTRL-H， CHAR（7））显示出来。

Clearly, a real implementation would verify that the system calls are actually successful. Note that after this code std::cin and stdin will immediately react on key presses. As a direct consequence, all kind of "funny" characters will be passed through. For example, when the delete key is used you'll see backspace characters (ctrl-H, char(7)) show up.

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