C++ Program to Maintain Employee Database using Virtual class

The word polymorphism means having many forms. Typically, polymorphism occurs when there is a hierarchy of classes and they are related by inheritance.

C++ polymorphism means that a call to a member function will cause a different function to be executed depending on the type of object that invokes the function.

Virtual Function : :

A virtual function is a function in a base class that is declared using the keyword virtual. Defining in a base class a virtual function, with another version in a derived class, signals to the compiler that we don’t want static linkage for this function.

Below is the source code for C++ Program to Maintain Employee Database using Virtual class which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C++ Program to Maintain Employee Database using Virtual class  */

#include <iostream>
#include <stdlib.h>
using namespace std;

class person
{
  protected:
      char name[20];
      int code;
  public:
      void getdetail(void)
      {
    cout<<"\n\nEnter name :- ";
    cin>>name;
    cout<<"\nEnter code :- ";
    cin>>code;
      }
      void dispdetail(void)
      {
    cout<<"\n\nNAME      :- "<<name;
    cout<<"\nCODE      :- "<<code;
      }
};

class account : virtual public person
{
  protected:
       float pay;
  public:
       void getpay(void)
       {
     cout<<"\nEnter Pay amount :- ";
     cin>>pay;
       }
       void dispay(void)
       {
      cout<<"\nPAY       :- "<<pay;
       }
};

class admin : virtual public person
{
  protected:
       int experience;
  public:
       void getexpr(void)
       {
      cout<<"\nEnter Experience in yrs :- ";
      cin>>experience;
       }
       void dispexpr(void)
       {
      cout<<"\nEXPERIENCE:- "<<experience;
       }
};

class master : public account, public admin
{
    public:
    void create(void)
    {
       cout<<"\n\n=====GETDATA IN=====\n";
       getdetail();
       getpay();
       getexpr();
    }

    void display(void)
    {
      cout<<"\n\n=====DISPLAY DETAILS=====\n";
      dispdetail();
      dispay();
      dispexpr();
    }

    void update(void)
    {
      cout<<"\n\n=====UPDATE DETAILS=====\n";
      cout<<"\nChoose detail you want to update\n";
      cout<<"1)  NAME\n";
      cout<<"2)  CODE\n";
      cout<<"3)  EXPERIENCE\n";
      cout<<"4)  PAY\n";
      cout<<"Enter your choice:- ";
      int choice;
      cin>>choice;
      switch(choice)
      {
        case 1 : cout<<"\n\nEnter name : - ";
             cin>>name;
             break;
        case 2 : cout<<"\n\nEnter code :- ";
             cin>>code;
             break;
        case 3 : cout<<"\n\nEnter pay :- ";
             cin>>pay;
             break;
        case 4 : cout<<"\n\nEnter Expereince :- ";
             cin>>experience;
             break;
        default: cout<<"\n\nInvalid choice\n\n";
      }
    }
};

int main()
{
    master ob1;
    int choice;
    while(1)
    {

       cout<<"\n\n=====EMPLOYE DATABASE=====\n\n";
       cout<<"\nChoose Operation you want to perform\n";
       cout<<"1)  Create  Record\n";
       cout<<"2)  Display Record\n";
       cout<<"3)  Update  Record\n";
       cout<<"4)  Exit\n";
       cout<<"\nEnter your choice:- ";
       cin>>choice;
       switch(choice)
       {
         case 1 : ob1.create();
              break;
         case 2 : ob1.display();
              break;
         case 3 : ob1.update();
              break;
         case 4 : exit(1);
        default : cout<<"\n\nInvalid Choice\nTry Again\n\n";
       }
    }
    return 0;
}

OUTPUT : :

/*  C++ Program to Maintain Employee Database using Virtual class  */

=====EMPLOYE DATABASE=====


Choose Operation you want to perform
1)  Create  Record
2)  Display Record
3)  Update  Record
4)  Exit

Enter your choice:- 1


=====GETDATA IN=====


Enter name :- Codez

Enter code :- 01

Enter Pay amount :- 40000

Enter Experience in yrs :- 3


=====EMPLOYE DATABASE=====


Choose Operation you want to perform
1)  Create  Record
2)  Display Record
3)  Update  Record
4)  Exit

Enter your choice:- 2


=====DISPLAY DETAILS=====


NAME      :- Codez
CODE      :- 1
PAY       :- 40000
EXPERIENCE:- 3

=====EMPLOYE DATABASE=====


Choose Operation you want to perform
1)  Create  Record
2)  Display Record
3)  Update  Record
4)  Exit

Enter your choice:- 3


=====UPDATE DETAILS=====

Choose detail you want to update
1)  NAME
2)  CODE
3)  EXPERIENCE
4)  PAY
Enter your choice:- 1


Enter name : - CodezClub


=====EMPLOYE DATABASE=====


Choose Operation you want to perform
1)  Create  Record
2)  Display Record
3)  Update  Record
4)  Exit

Enter your choice:- 2


=====DISPLAY DETAILS=====


NAME      :- CodezClub
CODE      :- 1
PAY       :- 40000
EXPERIENCE:- 3

=====EMPLOYE DATABASE=====


Choose Operation you want to perform
1)  Create  Record
2)  Display Record
3)  Update  Record
4)  Exit

Enter your choice:- 4

Process returned 1

Above is the source code and output for C++ Program to Maintain Employee Database using Virtual class which is successfully compiled and run on Windows System to produce desired output.