Operator Overloading

This is a discussion on Operator Overloading within the C++ Programming forums, part of the General Programming Boards category; K well we have an assiment to do the operator overloading and here is where i am stuck so for ...

  1. #1
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    Sep 2005
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    Operator Overloading

    K well we have an assiment to do the operator overloading and here is where i am stuck so for exmple we need to do in main program
    Code:
    ClassName n1;//Declaring variable
    int x;
    x=n1++;
    x=++n1;
    This is what i have in the calss but how do i tell diffirence between before and after. Thanks i hope u see what i mean.

    Code:
                               void operator ++()
    	   		  {
    			   	   ++number;
    	   		  }
    	   		  void operator ++()
    	   		  {
    			   	   number++
    	   		  }

  2. #2
    semi-colon generator ChaosEngine's Avatar
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    ahh this is a tricksy one! in order to tell the difference, the committee added an int parameter to the postfix operator. It's a bit of a hack, but it works.

    Code:
    class X
    {
    public:
        X operator++(int); // postfix operator (i.e. x++)
        X& opertor++(); // prefix operator (i.e. ++x)
    };
    note that the postfix returns an object and the prefix returns a reference. This is because postfix makes a copy BEFORE the increment and returns that. prefix just returns *this.

    This is why you should always use prefix unless you have a good reason not to.

    edit: BTW the extra parameter must be an int. you don't use the value anyway.
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  3. #3
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    Yah thanks that worked that was simple assiment phew lol last one we did was double link list and swap function gar hate that one but beside that thanks.

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