Explain pure virtual functions, C/C++ Programming

Assignment Help:

Pure Virtual Functions

An abstract class is one, which is used just for deriving some other classes. No object of this class is declared and used in the program. Likewise, there are pure virtual functions which themselves won't be used. Consider the above example with some changes.

class Shape

                 {

                  public :

virtual void print() = 0; // Pure virtual

                             function

                 };

                class Triangle : public Shape

                 {

                  public :

void print()

 {

                cout << " I am a Triangle " << endl;

 }

 };

class  Circle : public Shape

                 {

                  public :

void print()

 {

                cout << " I am a  Circle " << endl;

 }

                 };

 

 

 

void main()

 {

  Shape S;

  Triangle T;

  Circle C;

 

                  Shape *ptr;

 

                                ptr = &T;

                                ptr -> print();

 

ptr = &C;

                                ptr -> print();

                }

 


Related Discussions:- Explain pure virtual functions

Palindrome, A palindrome is a string that reads the same from both the ends...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

C program to find vowels and remove vowels , C Program to FIND VOWELS AND R...

C Program to FIND VOWELS AND REMOVE VOWELS void main() {           char s[100],s1[100];           int i,j,k=0;           clrscr();           printf("ENTER ANY S

Program Assignment #3, Programming Assignment #3: Vehicle Track Performance...

Programming Assignment #3: Vehicle Track Performance Tests Purpose: The purpose of this programming assignment is to give the student experience in using functions, arrays, and str

Addition in a existing c++ unification algorithm, Addition in a existing c+...

Addition in a existing c++ unification algorithm Project Description: I have a existing code for a algorithm and need to add two modules into it, it is a unification algorith

Prepare an application in c# or c++, Prepare an Application in C# or C++ ...

Prepare an Application in C# or C++ Project Description: We are seeking someone who can write a program in C# or C++. The idea is to prepare the program using a Cross Plat

Luminous Jewels - The Polishing Game, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Arrays, Write two different arrays. Store the names in it and then compare ...

Write two different arrays. Store the names in it and then compare if both the names entered by the user are the same.

Prepare a script for providing instagram followers, Prepare a script for pr...

Prepare a script for providing Instagram Followers/Likes I need to prepare a panel where my customer able to get Instagram followers or likes automatically. - A panel where I

C program to swap the two values, Program is to swap the two values which a...

Program is to swap the two values which are enter by user: Program is to swap the two values which are enter by user through the function with values changed using pointers

Minimum Shelf , At a shop of marbles, packs of marbles are prepared. Packet...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd