Explain: Programming

Question

1. What is the function of a class? What are the elements of a class?

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2. Differentiate Local, Instance and Class variable.

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3. What is the role of a constructor?

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4. What are the steps in creating an object?

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5. How do we access members of the class?

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Answer 1

(1)

Class is a set of data and functions , called METHODS,

that OPERATE on the data

Each piece of data is called a DATA MEMBER,or MEMBER VARIABLE.

Each Function Method is called a METHOD or MEMBER FUNCTION.

(2) Local vars: declare INSIDE the body of the function.

Class variable: one of the Member variables

Instance: a variable of the class type; such instance

is called an OBJECT

(3) Constructor: allows the data members to be initialized,

memory allocated, and values set so that

the object is ready to go and can be used

Destructor: clears the data members and FREEs allocated

memory when the object is no longer needed..

(about to go out of scope)

(4) Local object:

Class_name obj_name( paramters);

Pointer to object:

Class_name * ptr_to_obj_name = new Class_name(paramters)

(5) public methods called GETTERS are written to

return COPIES of the data to the caller;

public methods called SETTERS are written to

Set the values of the data in the class;