getch返回-1? [英] getch returns -1?

问题描述

他们问如何捕获诸如F11或insand getchr之类的键，这些键不返回任何内容，我找不到能接受来自输入事件的原始输入的工作.

They asked how to capture keys such as F11 or insand getchr does not return anything for those keys, and there is nothing I can find working that accepts raw input from input events..

我现在正在尝试在C ++程序中使用ncurses/curses来捕获这些键.

I am now trying ncurses/curses in a C++ program to capture these keys.

我要测试的程序很简单，基本上是:

My program to test is simple, it is basically:

#include <stdlib.h>
#include <stdio.h>
#include <curses.h>
int main() {
    int car;
    while(c != '\b') {
        c = getch();
        printf("%i", c);
    }
    return 0;
}

我当然使用它与另一个getch()函数相同，但是它无限次返回-1.

I use it of course the same as another getch() function, but it returns -1 infinite times.. I am using a recent kernel in Arch linux, in a standard terminal (tested in xterm as well)

是否需要打开某些开关才能在库中使用此getch()?

Is there a certain switch I need to switch on in order to use this getch() in the libraries?

推荐答案

您需要先调用initscr();初始化诅咒，然后再调用getch().

You need to call initscr(); to initialise curses before calling getch().

此外，您可能希望使用非行缓冲模式，因此您还应该调用cbreak(); noecho();(回声模式不应与cbreak模式一起使用).

In addition, you probably want non-line-buffered mode, so you should also call cbreak(); noecho(); (echo mode should not be used with cbreak mode).

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