oop concept
TRANSCRIPT
Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring PartnerBaabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
Week Target Achieved
1 30 20
2 30 22
3 30
Typing Speed
OOP concepts
Yasir musthafa [email protected]/
yasirmusthafatwitter.com/yasirmusthafa ppin.linkedin.com/in/
yasirmusthafapp8891396749
Introduction
• Purpose of c++ - To add object orientation to c programming
The concepts
• Objects• Class• Abstraction• Encapsulation• Inheritance• Polymorphism
objects
• Basic unit of oop concept• Both data and function are bundled as a unit
Class
• Blue print of object• What an object consist of-• What operation can be performed-
Encapsulation
• Mechanism of bundling the data and function that use them
• Data binding• Keep both safe from outside interference and
misuse• Led to data hiding
Abstraction
• Mechanism of exposing only the interfaces and hiding the implementation details
Example
class Box { public: double getVolume(void) { return length * breadth * height; } private: double length; // Length of a box double breadth; // Breadth of a box double height; // Height of a box }
Inheritance
• Code reusability• Process of forming a new class from an
existing class existing class-base class new class – derived class• is a - relationship
Example // Base class class Shape { public: void setWidth(int w) { width = w; } void setHeight(int h) { height = h; } protected: int width; int height; };
Inheritance (conti)// Derived class class Rectangle: public Shape { public: int getArea() { return (width * height); } }; int main(void) { Rectangle Rect; Rect.setWidth(5); Rect.setHeight(7); // Print the area of the object. cout << "Total area: " << Rect.getArea() << endl; return 0; }
Polymorphism
• Ability to use an operator or function in different ways
• Single function or an operator functioning in many ways different upon the usage
Example class Shape { protected: int width, height; public: Shape( int a=0, int b=0) { width = a; height = b; } virtual int area() { cout << "Parent class area :" <<endl; return 0; } };
Polymorphism(conti)class Rectangle: public Shape{ public: Rectangle( int a=0, int b=0):Shape(a, b) { } int area () { cout << "Rectangle class area :" <<endl; return (width * height); } };class Triangle: public Shape{ public: Triangle( int a=0, int b=0):Shape(a, b) { } int area () { cout << "Triangle class area :" <<endl; return (width * height / 2); } };
Polymorphism(conti) // Main function for the program int main( ) { Shape *shape; Rectangle rec(10,7); Triangle tri(10,5); // store the address of Rectangle shape = &rec; // call rectangle area. shape->area(); // store the address of Triangle shape = &tri; // call triangle area. shape->area(); return 0; }
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