member function syntax

This is a discussion on member function syntax within the C++ Programming forums, part of the General Programming Boards category; I'm working thru SAMS C++ in 21days and am confused by the operator overloading. Here's some code: #include <iostream> #include ...

  1. #1
    Registered User
    Join Date
    Jun 2002
    Posts
    14

    Unhappy member function syntax

    I'm working thru SAMS C++ in 21days and am confused by the operator overloading. Here's some code:

    #include <iostream>
    #include <stdlib.h>

    class Counter
    {
    public:

    Counter(int val);
    ~Counter(){}
    int GetItsVal()const{return itsVal;}
    void SetItsVal(int x){itsVal=x;}
    void Increment(){++itsVal;}
    Counter operator++();
    private:
    int itsVal;
    };



    Counter::Counter(int val):itsVal(val){}

    Counter Counter:perator++()//WHY IS THIS COUNTER COUNTER? WHY 2 COUNTERS?
    {
    ++itsVal;
    return Counter(itsVal);
    }

    int main()
    {
    Counter i(0);
    cout<<"i: "<<i.GetItsVal()<<endl;
    i.Increment();
    cout<<"i: "<<i.GetItsVal()<<endl;
    ++i;
    cout<<"i: "<<i.GetItsVal()<<endl;
    Counter a=++i;
    cout<<"a: "<<a.GetItsVal()
    <<" i: "<<i.GetItsVal()<<endl;

    system("PAUSE");
    return 0;
    }

    My question in comments above. To elaborate: Is this only done with the operator overloading? Is it because the function returns type Counter?

    Thanks for any help on this...

    BTW. The smiley is not original to the code, but is interpreted by the forums its the second colon and a lower case 'o'
    -Dev-C++ 5.beta somesuch
    --"Hello world!" (52%)

    "Stupidity - the number one sexually transmitted disease."

  2. #2
    ....
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    The first Counter is the return type, the second makes clear that it is a member function of that class.

  3. #3
    Registered User The Dog's Avatar
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    If you're referring to the syntax, then all that this
    Code:
    Counter Counter::operator++()
    Counter:perator++() <<--- This is the member function

    The 'Counter' before that is the type that is returned.

  4. #4
    Registered User
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    Jun 2002
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    14

    Smile

    thanks guys. I was hoping it was that simple.
    -Dev-C++ 5.beta somesuch
    --"Hello world!" (52%)

    "Stupidity - the number one sexually transmitted disease."

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