Object Oriented Programming using C#

Object Oriented Programming using C#

Case Study

A constructor is required to assign a new HashSet() to Messages (the set of messages stored). The following methods are

also required :-

void AddMessage(Message msgToAdd) to add a message to the message set

void display(DisplayBoardControl db) to display the messages each day on a display board... initially a

simulated display board

void DailyPurge(ClientBook clients) to a) decrement the days remaining at the end of each day for each

message, b) charge the client for displaying that message and c)

remove all messages that have expired.

private bool ToBeDeleted() a private method used by the DailyPurge() to denote which messages

are to be removed from the message set i.e. those that have expired.

what‘s missing in this equation?

maeRsK inteRnationaL teChnoLogY & sCienCe PRogRamme

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