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C++ Discussion Thread
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Dec 2nd, 2007

pointers and classes

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i have a class called Employee and a method in that class called display(). When that method is called it displays a first name and a last name.

In my int main() i have...

C++ Syntax (Toggle Plain Text)
int main()
{
Employee emp;
Employee* ptr;
 
return 0 ;
}
int main()
{
Employee emp;
Employee* ptr;

return 0 ;
}

I was wondering if there were a way to have the pointer point to emp and then use the pointer to display emp as opposed to simply saying...

C++ Syntax (Toggle Plain Text)
emp.display();
emp.display();

if this is possible how would i do it?

Thanks for the help

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cl3m0ns

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Dec 2nd, 2007

Re: pointers and classes

Well yes its possible, but why would you want to do it? Unless, of course you are passing a pointer to another function.

C++ Syntax (Toggle Plain Text)

Employee emp;
Employee* ptr = &emp;
ptr->display();

Last edited by Ancient Dragon; Dec 2nd, 2007 at 8:55 pm.

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Dec 2nd, 2007

Re: pointers and classes

Click to Expand / Collapse Quote originally posted by Ancient Dragon ...

Well yes its possible, but why would you want to do it?
[/code]

I was just trying to figure out how powerful or useful pointers are because they just seem worthless to me...thanks for your help though.

cl3m0ns

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Re: pointers and classes

one purpose of pointers to to allocate an array of something because the size is not known until the program is run.
Employee* empArray = new Employee[NumberEmployees];
Another purpose: creating a linked list of Employee classes. Admittedly most c++ programmers would using c++ container classes such as vector or dqueue.

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Re: pointers and classes

Click to Expand / Collapse Quote originally posted by cl3m0ns ...

I was just trying to figure out how powerful or useful pointers are because they just seem worthless to me...thanks for your help though.

Then you simply don't know enough of the language yet. The knowledge and understanding will come. You don't need to rush it yet.

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