Juxtapose the use of override with new. What is shadowing?
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Answer Posted / nawaz
Using override keyword to a method in the derived class
meaning the method provides a new implementation to the
overridden method (same signature) in the base class. The
base method must be virtual, abstract, or override.
By default a method is not modified by ‘virtual’. So if a
method in derived class wants to override the base
implementation, it needs to be modified by ‘new’ keyword.
This is called shadowing, not overriding. The method in the
derived HIDES the one in the base class.
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2) Write a program that will help Air Traffic Control for an airport to view the sequence of flights ready for take-off. The airport can accommodate 10 flights waiting for take-off at any point in time. Each flight has a unique 3 digit numeric identifier. Each time a flight takes-off, Air Traffic Control adds a flight to the waitlist. Each time a flight is added to the waitlist, the list of flights waiting to take-off must be displayed. When a flight is cleared for take-off, Air Traffic Control removes the flight from the waitlist. Each time a flight takes-off, the list of flights waiting to take-off must be displayed. Sequence of take-off is the sequence of addition to the waitlist
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