Polymorphism

[taj22]

i want to know the definition of Polymorphism with example for my exam.
thankz
from
taj

[taj22]

for my exam, i want "Five reasons of using constant variable or constant identifier".
please quick and help me now.
thankz

[Ganon11]

What do you know about these problems? Is there anything you don't understand, or are you just looking for a quick 'A' on your exam?

[taj22]

Yes ,i just want to know about that for my exam .

[taj22]

What do you know about these problems? Is there anything you don't understand, or are you just looking for a quick 'A' on your exam?

i don't know about these problem.i want that just for my exam. please help me quick.

[Ganon11]

Well, Polymorphism is a critical concept that I can't fully explain. Basically, it is the ability to use subclasses and base classes. Suppose I was making a chess game. The board is full of chess pieces, but I can't be sure which piece is which. They'll all act similarly, though. I use a chessPiece class as an abstract base class, and use Rook, Pawn, King, etc classes as subclasses of chessPiece. In my main program, I can use methods common to all chessPieces on the members of the board, even though I don't know specifically which piece it is - in other words, I might use chessPiece.validateMove(), but if the chessPiece was a Rook, then the method executed would be Rook.validateMove().

As for constant identifiers, one big reason is that, if your program depends on constant variables, you can change that definition at the beginning of your program and alter the entire way your program runs - the alternative would be to find every time you used a hard coded number and change it.

[taj22]

thankz for ur reply
but i want just Theory of that definitions. For study .

Well, Polymorphism is a critical concept that I can't fully explain. Basically, it is the ability to use subclasses and base classes. Suppose I was making a chess game. The board is full of chess pieces, but I can't be sure which piece is which. They'll all act similarly, though. I use a chessPiece class as an abstract base class, and use Rook, Pawn, King, etc classes as subclasses of chessPiece. In my main program, I can use methods common to all chessPieces on the members of the board, even though I don't know specifically which piece it is - in other words, I might use chessPiece.validateMove(), but if the chessPiece was a Rook, then the method executed would be Rook.validateMove().

As for constant identifiers, one big reason is that, if your program depends on constant variables, you can change that definition at the beginning of your program and alter the entire way your program runs - the alternative would be to find every time you used a hard coded number and change it.