Programming and Graphics

188 Introduction to C++ Programming and Graphics

Running the program prints on the screen:

tulip black $4.99

annual red flower for $6

perennial garden yellow $9.39

Note that a flower uses the flower-classprintfunction, and a rose uses the
rose-classprintfunction.

To further illustrate this distinction, we endow the flower class with the
function:

void flower::printprice() const

{

cout <<"PRICE: $"<< price << endl;

}

and the derived rose class with the same-named function:

void rose::printprice() const

{

cout << "OUR PRICE: $" << price << endl;

}

We may then state in the main code:

flower A = flower();

A.printprice();

rose W = rose("perennial", "garden", "yellow", 9.39);

W.printprice();

Running the code produces on the screen:

PRICE: $4.99

OUR PRICE: $9.39

If we had implemented theprintpricefunction only in the flower class and
not theprintpricefunction in the rose class, the output of the code would
have been:

PRICE: $4.99

PRICE: $9.39