控制台程序如何得知光标（方向）键按下了

控制台程序怎么得知光标（方向）键按下了
用扫描码？

具体的怎么做？

[解决办法]
getchar()
[解决办法]
用ReadConsoleInput，具体说明去MSDN上看下，给个例子：

C/C++ code

while(1){    INPUT_RECORD irInBuf;    DWORD cNumRead;    ReadConsoleInput(GetStdHandle(STD_INPUT_HANDLE),&irInBuf,1,&cNumRead);    if(irInBuf.EventType == KEY_EVENT && irInBuf.Event.KeyEvent.bKeyDown == TRUE)    {        if(irInBuf.Event.KeyEvent.wVirtualKeyCode == 38 && GetConsoleWindow()==GetForegroundWindow())        {            //按了上        }        else if(irInBuf.Event.KeyEvent.wVirtualKeyCode == 40 && GetConsoleWindow()==GetForegroundWindow())        {            //按了下        }        else if(irInBuf.Event.KeyEvent.wVirtualKeyCode == 37 && GetConsoleWindow()==GetForegroundWindow())        {            //按了左        }        else if(irInBuf.Event.KeyEvent.wVirtualKeyCode == 39 && GetConsoleWindow()==GetForegroundWindow())        {            //按了右        }    }}
[解决办法]
方法二：

C/C++ code
#define KEY_UP    0xE048#define KEY_DOWN  0xE050#define KEY_LEFT  0xE04B#define KEY_RIGHT 0xE04Dint GetKey(){    int nkey=getch(),nk=0;    if(nkey>=128||nkey==0)nk=getch();    return nk>0?nkey*256+nk:nkey;}
[解决办法]
探讨


方法二：

C/C++ code
int GetKey()
{
    int nkey=getch(),nk=0;
    if(nkey>=128||nkey==0)nk=getch();
    return nk>0?nkey*256+nk:nkey;
}

[解决办法]
C/C++ code
//The _getch function reads a single character from the console without echoing.//Function can not be used to read CTRL+Break.//When reading a function key or an arrow key,//_getch must be called twice; the first call returns 0 or 0xE0,//and the second call returns the actual key code.#include <conio.h>#include <windows.h>void main() {    unsigned short k;    while (1) {        Sleep(100);        k=getch();        if (27==k) break;//按Esc键退出        if (0==k||0xe0==k) k|=getch()<<8;//非字符键        cprintf("%04x pressed.\r\n",k);    }}