Combime keys

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  • paytam@gmail.com
    #1

    Combime keys

    Hi all
    I want to use combine keys in my code such as ctrl+w or or Alt or F
    keys.What should I do? and is there any special data type which I use
    for this purpose?

    Tags: None
    • Walter Roberson
      #2
      Re: Combime keys

      In article <1131390634.199 377.287840@g47g 2000cwa.googleg roups.com>,
      <paytam@gmail.c om> wrote:[color=blue]
      >I want to use combine keys in my code such as ctrl+w or or Alt or F
      >keys.What should I do? and is there any special data type which I use
      >for this purpose?[/color]

      There is no standard C portable method of doing that: the execution
      set of C does not assume ASCII or any other character set, and
      so does not assume that control characters even exist.

      I would suggest that you review the recent "arrow keys" thread;
      my suspicion is that after that, the next stop for you should be
      a Windows programming newsgroup.

      --
      I am spammed, therefore I am.

        Comment

        • Keith Thompson
          #3
          Re: Combime keys

          paytam@gmail.co m writes:[color=blue]
          > I want to use combine keys in my code such as ctrl+w or or Alt or F
          > keys.What should I do? and is there any special data type which I use
          > for this purpose?[/color]

          There's no way to do this in portable C.

          Some key combinations may show up as single characters, depending on
          how you read them. For example, if you read a control-w using
          getchar(), you'll probably see a single '\x17' character (assuming
          ASCII and the usual semantics of the control key). If you use a
          lower-level interface, you might see the keystrokes separately, but
          that's *extremely* system-specific.

          In general, portable C can't read a single character or keystroke
          without waiting for the end of the line. See question 19.1 of the
          C FAQ <http://www.eskimo.com/~scs/C-faq/top.html>.

          The particular character sequences produced by particular keystrokes
          (control-w, alt-f, F1, etc.) are system-specific.

          --
          Keith Thompson (The_Other_Keit h) kst-u@mib.org <http://www.ghoti.net/~kst>
          San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
          We must do something. This is something. Therefore, we must do this.

            Comment

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