Thread: C++ Syntax

  1. #1
    Registered User
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    Oct 2011

    C++ Syntax

    I am having trouble with some existing C++ that I have been asked to modify. Can someone please explain the following code to me please?

    extern "C" void SpiPutword( Uint16 w )
        Lcd().ProcessDataWord( w );
    I don't recall coming across funtion1().funtion2() before...

    The above code was taken from a VS2005 C++ MFC project. Basically it's suppose to be a test harness (PC emulator) for a touchscreen wall controller (ie., air conditioner wall controller).

    Any suggestions or advice would be much appreciated.


  2. #2
    Registered User
    Join Date
    Aug 2011
    Montreal, Quebec, Canada
    Lcd() returns an object that contains function ProcessDataWord().

  3. #3
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    Quote Originally Posted by skrep
    I don't recall coming across funtion1().funtion2() before...
    You might be more familiar with:
    x = Lcd();
    x.ProcessDataWord( w );
    The code you read merely eliminated the variable x by chaining the function calls.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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