C++ 从cin获取方向键
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Getting arrow keys from cin
提问by Baruch
I am sure this must have been asked before, but a quick search found nothing.
我相信这之前一定有人问过，但快速搜索一无所获。
How can I get the arrow/direction keys with cinin c++?
如何cin在 C++ 中获得箭头/方向键？
回答by Kerrek SB
It has indeed been asked before, and the answer is that you cannot do it.
以前确实有人问过，答案是你做不到。
C++ has no concept of a keyboard or a console. It only knows of an opaque input data stream.
C++ 没有键盘或控制台的概念。它只知道不透明的输入数据流。
Your physical console preprocesses and buffers your keyboard activity and only sends cooked data to the program, usually line-by-line. In order to talk to the keyboard directly, you require a platform-specific terminal handling library.
您的物理控制台会预处理和缓冲您的键盘活动，并且通常会逐行向程序发送经过处理的数据。为了直接与键盘对话，您需要一个特定于平台的终端处理库。
On Linux, this is usually done with the ncursesor termcap/terminfolibraries. On Windows you can use pdcurses, or perhaps the Windows API (though I'm not familiar with that aspect).
在 Linux 上，这通常使用ncurses或termcap/terminfo库来完成。在 Windows 上，您可以使用pdcurses，或者 Windows API（尽管我不熟悉这方面）。
Graphic-application frameworks such as SDL, Allegro, Irrlicht or Ogre3D come with full keyboard and mouse handling, too.
SDL、Allegro、Irrlicht 或 Ogre3D 等图形应用程序框架也带有完整的键盘和鼠标处理。
回答by Software_Designer
Here is a pointer if you dont mind using getch()located in conio.h.
如果您不介意使用getch()位于conio.h.
#include <stdio.h>
#include <conio.h>
#define KB_UP 72
#define KB_DOWN 80
#define KB_LEFT 75
#define KB_RIGHT 77
#define KB_ESCAPE 27
int main()
{
int KB_code=0;
while(KB_code != KB_ESCAPE )
{
if (kbhit())
{
KB_code = getch();
printf("KB_code = %i \n",KB_code);
switch (KB_code)
{
case KB_LEFT:
//Do something
break;
case KB_RIGHT:
//Do something
break;
case KB_UP:
//Do something
break;
case KB_DOWN:
//Do something
break;
}
}
}
return 0;
}
