Question

Like in Game engines for example in XNA the update function is called automatically again and again. I want to know how i can achieve this in c++.

For ex:

class base
{
void Update();
};

class child1: public base
{
void Update();
}

class child2: public base
{
void Update();
}

void main()
{
base *obBase = new base();
obBase->Update(); /*This should call Update of Child1 and Child2 classes how can I do  this*/
}

Answer 1

Just make it virtual:

class base
{
    virtual void Update();
};

This will provide polymorphic behavior

And I assume you ment:

base *obBase = new child1(); //or new child2();