extracting parameters

This is a discussion on extracting parameters within the C++ Programming forums, part of the General Programming Boards category; I'm new to C++ and would like some help on how I can extract more than one parameter from a ...

  1. #1
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    Dec 2004
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    extracting parameters

    I'm new to C++ and would like some help on how I can extract more than one parameter from a string. I have an example of a function that will receive the string. The string contains two parameters and I don't know how to pull off the second parameter. Thanks in Advance.
    JK


    Code:
    void Message_Received(std::istream& args)
    {
        unsigned msg;
    
        // Pull off  the first param in the string
        args >> msg;
    
       // Pull off the second param in the string
       ????
    }

  2. #2
    Registered User hk_mp5kpdw's Avatar
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    If it's another unsigned value, for instance, you simply repeat the extraction from the stream like you did for the first parameter:

    Code:
    void Message_Received(std::istream& args)
    {
        unsigned msg, msg2;
    
        // Pull off  the first param in the stream
        args >> msg;
    
        // Pull off the second param in the stream
        args >> msg2;
    
        ...
    
    }
    Or you could just put everything on one line:

    Code:
    void Message_Received(std::istream& args)
    {
        unsigned msg, msg2;
    
        // Pull off the params from the stream
        args >> msg >> msg2;
    
        ...
    
    }
    [edit]Be careful you don't confuse yourself over strings vs streams, they are different things and what you are talking about here are the latter.[/edit]
    Last edited by hk_mp5kpdw; 12-15-2004 at 11:22 AM.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  3. #3
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    Thanks so much for your help and clarification on strings vs streams. I was able to implement what you said and it works!

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