accessing class members

[nicasa]

Hi there,

I would like to know when you should use the dot (.) operator as opposed to the (->) arrow operator when accessing class members ?
Should you be using the -> operator only when accessing class members for a dynamically created modal form ?

I have a class called 'utils' (within utilities.cpp) and I would like to call the functions within it from mainform.cpp. How should I instantiate it ? Should I include these lines at the top of mainform.cpp:

#include "utilities.h"
utils tools

// I can then use the tools object to call the functions

How and where can I instantiate utils dynamically:

utils tools = new utils() ???
// code here
delete tools


Thanks

bigSteve

 

[hennep]

The arrow operator is used for pointers:

utils *tools = new utils;
tools->myMethod();

or:

utils tools;
tools.myMethod();

 

[butthead]

Edit1->Text.c_str ();

does this mean that the Edit object has
been instantiated with the new operator
whereas the Text member is just declared.

Just a thought

tomcruz.net

 

[hennep]

Yep,

The editbox is declared as a pointer (*Edit1), you can check that in the forms header file;
The Text object is declared as "AnsiString Text" inside the Edit1 object, don't know how to make that visible.