Objects and Classes

What do you mean by constructor and destructor? Explain the necessity of copy constructor with example. Also explain order of invocation of constructor and destructor with example.

Why do we need constructors and destructor? Create a class called "time" with data member hour, minute, second and day. Initialize all the data member using constructor. Write a program to add two "time" object using necessary member functions and display the result in main().

What are the properties of Constructors? Create a class called volume that uses three data members (length, width, height) in terms of feet and inches to model the volume of a room. Read the three dimensions of the room and calculate the volume it represent, and print out the result. The volume should be in feet, i.e. you will have to convert each dimension into the feet and fraction of foot. For instance, the length 12 feet and 6 inches will be 12.5 ft.