Answer to Question #264557 in C++ for Sami

Question

Question 2a: Explain further on the three main principles of Object-Oriented Programming

2b: More Details on each one How it works on C++ with 2 examples each

Answer 1

2a

Encapsulation - The process of combining data members and functions in a single unit called class.

Polymorphism - The same entity (function or object) behaves differently in different situations.

Inheritance- The process of extending and modifying a class without modifying it.

Examples:

2b

Examples of Polymorphism:

Operator + can perform the following operations:
- Adding numbers
int x= 6;
int y=1;
int sum = x + y;
- Concaneting strings
string first = "John";
string second = "Paul";
string full_name = first +" "+second;

Examples of Inheritance:

class Shape{

};
class Square: Shape{



};

The class Square will inherit the members of class Shape;

Examples of Encapsulation:

class Rectangle {
  public:
    int l;
    int b;

    int getArea() {
      return l* b;
    }
};

Both l and b are being used inside the function getArea()
Therefore, l and b are being encapsulated inside the function getArea()