CODEWITHSUNDEEP
c++default-valuederived-classbase-class
Wartin
Wartin

Reputation: 1965

Strange error c2660 "function does not take 1 arguments"

My base class has this function

LRESULT CBaseClass::OnTestFunction(WPARAM id, LPARAM=0)
{
...
}

When the derived class calls this function 

OnTestFunction(nId);

I get an error C2660 : "function does not take 1 arguments".

Why is that ?

Upvotes: 2

Views: 6937

Answers (3)

sharptooth
sharptooth

Reputation: 170539

The default value should be in the class definition:

class CBaseClass {
    LRESULT OnTestFunction(WPARAM id, LPARAM=0);
};

so that the derived class can see that signature and the default value.

Upvotes: 4

unquiet mind
unquiet mind

Reputation: 1112

You need to put the default value in the class definition in the header file.

class CBaseClass {
    ....
    LRESULT OnTestFunction(WPARAM id, LPARAM=0);
    ....
};

Upvotes: 6

merxbj
merxbj

Reputation: 381

Shouldn't be there a name of the parameter in the signature? Like:

LRESULT CBaseClass::OnTestFunction(WPARAM id, LPARAM optional = 0)
{
   ...
}

Upvotes: 0

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