constructor

[Gabboshow]

Hello folks,

could you please explain me the following code?

name_class *name = new name_class()

the constructor is

name_class::name_class()
{
}

I've understood that I define a pointer called name and invoke the constructor that allocate the memory for that pointer. correct? could you tell more?
when I've to call delete?
thanks

[firix]

for example:

class name_class{
char *name;
public:
   name_class(char *n)
   {
        name  = new char[strlen(n) + 1];
		strcpy(name, n);
   }

	~name_class()
	{
		delete [] name;
	}

	void print()const
	{
		cout << "(" << name << ")" << endl;
	}
};

int main()
{
	name_class *name = new name_class("Gabboshow");


	name->print();


	delete name;



	return 0;
}

[coder777]

Gabboshow wrote:

I've understood that I define a pointer called name and invoke the constructor that allocate the memory for that pointer. correct?

wrong. 'new' allocates the memory where 'name_class' will reside then calls the constructor.

Gabboshow wrote:

when I've to call delete?

When you don't need that object anymore. Be careful when you gave away that pointer it's not always trivial. Therefore smart pointer where invented