reading keystrokes

This is a discussion on reading keystrokes within the C++ Programming forums, part of the General Programming Boards category; It's not "extra stuff", it's part of the code you need. It's not just one line to do this - ...

  1. #16
    Kernel hacker
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    It's not "extra stuff", it's part of the code you need. It's not just one line to do this - it's about 15-20 lines. So you need all of this:
    Code:
    // Code supplied by LuckY
    
    #include <iostream> 
    #include <windows.h> 
    
    bool keyHit(void)
    {
      HANDLE  stdIn = GetStdHandle(STD_INPUT_HANDLE);
    
      DWORD   saveMode;
      GetConsoleMode(stdIn, &saveMode);
      SetConsoleMode(stdIn, ENABLE_PROCESSED_INPUT);
    
      bool  ret = false;
    
      if (WaitForSingleObject(stdIn, 1) == WAIT_OBJECT_0) ret = true;
    
      SetConsoleMode(stdIn, saveMode);
    
      return(ret);
    }
    
    bool getChar(TCHAR &ch)
    {
      bool    ret = false;
    
      HANDLE  stdIn = GetStdHandle(STD_INPUT_HANDLE);
    
      DWORD   saveMode;
      GetConsoleMode(stdIn, &saveMode);
      SetConsoleMode(stdIn, ENABLE_PROCESSED_INPUT);
    
      if (WaitForSingleObject(stdIn, INFINITE) == WAIT_OBJECT_0)
      {
        DWORD num;
        ReadConsole(stdIn, &ch, 1, &num, NULL);
    
        if (num == 1) ret = true;
      }
    
      SetConsoleMode(stdIn, saveMode);
    
      return(ret);
    }
    
    TCHAR getChar(void)
    {
      TCHAR ch = 0;
      getChar(ch);
      return(ch);
    }
    
    int main(void)
    {
      std::cout << "Press a key" << std::endl;
      getChar();
      std::cout << "Done" << std::endl;
    }
    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  2. #17
    Registered User
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    you were almost right it was getchar(x) but you were really close

  3. #18
    Kernel hacker
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    Quote Originally Posted by h3ckf1r3 View Post
    you were almost right it was getchar(x) but you were really close
    Since the code is C++, it implements two functions:
    bool getChar(TCHAR &ch);
    TCHAR getChar(void);

    The latter will work with what I wrote, whilst the former will work as you write it. Obvioulsy, calling just getChar() without assigning the return value to anything will not work.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  4. #19
    Registered User
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    Thanks for all the help you have been for me

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