RE: [Dev-C++] Copy Constructors and Overloaded Assignment Operators

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Matthew Hickson
> Sent: Saturday, July 20, 2002 11:12 PM
> To: Dev...@li...
> Subject: [Dev-C++] Copy Constructors and Overloaded 
> Assignment Operators
> 
> 
> Hello guys,
> 
> Just a quick question...
> 
> I'm having a rough time getting some copy constructors and overloaded 
> assignment operators to work.  I've had a look through my stuff (Ivor 
> Horton - Wrox - Beginning C++; Steve Oualline - O'Reilly - 
> Practical C++ 
> Programming), but to no avail.
> 
> I feel like I'm asking how to unsubscribe here, so please be 
> gentle... 8-)  
> (By the way, can't an Admin just set up a list filter to 
> clobber these 
> guys... )
> 
> Here's the error... (others are similar)
> 
> "passing 'const Test' as 'this' argument of 'int Test::getData()' 
> discards qualifiers
> 
> [code begins]
> // Copy Constructor
> Test::Test(const Test& TestCopy){
>      data = TestCopy.getData();
>      data2 = TestCopy.getData2();
> }
> 
> // Operator =
> Test& Test::operator=(const Test& Test2){
>      data = Test2.getData();
>      data2 = Test2.getData2();
>     
>      return *this;
> }
> [code ends]
> 
> I've tried using my set functions (what I want to do anyhow...),
> 
> i.e. this.setData(Test2.getData()); // this omitted too...
> 
> I've also tried...
> 
> data = Test2->getData();
> 
> I'm going to keep looking, but a quick pointer to a good discussion
> on this would be great (or a good discussion).
> 
> Any help would be greatly appreciated.


Assuming your data is an int x; define getData()  as:


int getData() const { return x; }


Notice that const above.


Ioannis

* Ioannis Vranos
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