RE: [Dev-C++] Help with creating objects dynamically

[Marc H. <ma...@e-...>]

Hi Somanathan,

There's probably a million different ways of doing this. I would =
probably
start by creating a NewPerson method defined something like (and =
defines):

#define PERSON_WORKER 1
#define PERSON_CLERK 2
#define PERSON_MANAGER 3
base* NewPerson(int nType)
{
	switch(nType)
	{
		case PERSON_WORKER:
			return (base*) new worker;
		case PERSON_CLERK:
			return (base*) new clerk;
		case PERSON_MANAGER:
			return (base*) new manager;
		default:
			return (base*) NULL;
	}
}

And then your function becomes:

some_func(int i)
{
	base *b =3D NewPerson(i);
	b->any_common_func();
}

Then you only have to maintain the switch in NewPerson().
__________________________________
Marc Heiligers


-----Original Message-----
From: Somanathan Kaimal [mailto:som...@wi...]=20



Hi Gurus,

I would like to take this discussion to another turn,

Say if I have requirement like creating an object dynamically, means not =
the
object name but the class definition needs to be dynamically chosen, for
eg:- let me talk in C++ language=20

Class worker : public base
{
}
class clerk : public base
{
}
class manager : public base
{
}
// create an array of string
string emp[3] =3D {"worker","clerk","manager"};=20

some_func(int i)
{
  base b* =3D new emp[i];
  b->any_common_func();
}

--------------
This avoids lots of case statements, makes it easy to maintain and =
extend.=20
Any body has any idea how to implement it in C++(equivalent to =
Class.forname
in JAVA) If you have any other idea to accomplish this, also welcome.

Let me know if things are not clear.

Thanks
Somanathan