Please give me a pointer

[Wong]

Hi,
I see some codings like this but I don't know C++. I would
appreciated if you can shed me a light. Just point me the term for me
to look for.

a_class & a_class:perator=( const a_class & an_argument )
{
/* Bla Bla Bla */
return *this;
}


So what is this in C++ ?
Thanks in advance.

 

[Karl Heinz Buchegger]

Hi,
I see some codings like this but I don't know C++. I would
appreciated if you can shed me a light. Just point me the term for me
to look for.

a_class & a_class:perator=( const a_class & an_argument )
{
/* Bla Bla Bla */
return *this;
}

So what is this in C++ ?
Thanks in advance.

It is a 'copy assignment operator' or often
simply called an 'assignment operator'.

You should find information on that in every
C++ book with those keywords.

 

[Gernot Frisch]

Hi,
I see some codings like this but I don't know C++. I would
appreciated if you can shed me a light. Just point me the term for
me
to look for.

a_class & a_class:perator=( const a_class & an_argument )
{
/* Bla Bla Bla */
return *this;
}


So what is this in C++ ?

that's the function that get's called when you write:
a_class a, b;

a = b; // this line

where an_argument will be 'b', and *this will be 'a'.

HTH,
-Gernot

 

[kevin.hall]

"this" is a pointer to the class instance currently being acted on by
some class method.

In the example you wrote, "this" is a pointer to an instance of class
"a_class" being acted upon by the method "a_class:perator=(const
a_class&)".