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Thread: a simple question:about 'out'

  1. #1
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    Default a simple question:about 'out'

    I want to output two results in a function,so I define it as follows:

    bool getData(out QList<float> A,out QList<float> B)
    {
    }

    but error occur:
    error C2061: syntax error : identifier'out'.
    How to define 'out' para in a funtion?
    thank you.

  2. #2
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    Default Re: a simple question:about 'out'

    bool getData(out QList<float> A,out QList<float> B)
    Open your book, find out why this is not valid C++ syntax.

    Usually, if you want to pass in a variable that you will assign inside a function, you use either a reference or a pointer:

    Qt Code:
    1. bool getData( QList<float> & A, QList<float> & B )
    2.  
    3. // or
    4.  
    5. bool getData( QList<float> * A, QList<float> * B )
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    <=== The Great Pumpkin says ===>
    Please use CODE tags when posting source code so it is more readable. Click "Go Advanced" and then the "#" icon to insert the tags. Paste your code between them.

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