Questions

1. What is the keyword used to call the constructor from the base class?

• this.
• the name of the base class.
• base
• over
• inherits

Problem

Consider the following diagram:

Suppose you are given an implementation of the Room class, such that

    Room test = new Room("UH", 243);
    Console.WriteLine(test);

displays

UH 243

1. Write an implementation of the ClassRoom class. Your ToString method should display the room’s building and number, in addition to whether it has AV set-up.

   Solution

   class ClassRoom : Room
   {
     private bool av;
    
     public ClassRoom(string bP, int nP, bool aP)
       : base(bP, nP)
     {
       av = aP;
     }
    
     public override string ToString()
     {
       return base.ToString() + "av? " + av;
     }
   }

2. Write a SameBuilding static method to be placed inside the Room class such that

   Office test1 = new Office("UH", 127, "706 737 1566");
   ClassRoom test2 = new ClassRoom("UH", 243, true);
   Office test3 = new Office("AH", 122, "706 729 2416");
   Console.WriteLine(Room.SameBuilding(test1, test2));
   Console.WriteLine(Room.SameBuilding(test2, test3));

   Would display “true” and “false”.

   Solution

     public static bool SameBuilding(Room a, Room b)
     {
       return a.building == b.building;
     }