C Programming 1 What does the following code do void drawSqu

C++ Programming

1) What does the following code do?

void drawSquares(Shape **p, int size)

{

Square *sp;

for ( int i = 0; i < size; i++ )

{

sp = dynamic_cast<Square*>(p[i]);

if ( sp )

sp->draw();

}

}

2) Explain why a factory member function should be a static member function.

Solution

Solution:

1) The above code is an example of downcasting, the code initially trying to obtain information at run time, so there are using pointers which can be used for testing dynamic_cast.

Using a cast from a base class type to a derived type is called downcasting.

The above function implements by taking an array of pointers to shapes as an argument and draws squares only.

2) Factory member function should be a static member function because functions can be used for: