Include a member to calculate the gross salary of regular Employee using formula
Gross salary = Basic salary + HA + DRA.
where HA AND DRA should be stored as constant static data members of class.
Include a member to calculate the gross salary of Part time Employee using formula
Gross salary = Pay per hrs * no. of hrs.
where pay per hrs. should be stored as constant static data members of class.
Calculate the salary of a both types of employee using virtual function and display it .

#include<iostream>
using namespace std;
class Employee {
 public :
 string name,doj;
 int id;
 void input() {
 cout<<"Enter Emp. Id ";
 cin>>id;
 cin.ignore(1,'\n');
 cout<<"Enter Name ";
 getline(cin,name);
 cout<<"Enter Date of Joining ";
 getline(cin,doj);
 }
 virtual void calc() = 0;
 virtual void disp() = 0;
};
class Regular : public Employee {
 public :
 int bsal,gsal;
 static int HA, DRA;
 void calc() {
  cout<<"Enter Basic Salary ";
  cin>>bsal;
  gsal = bsal+HA+DRA;
  }
  void disp() {
  cout<<"Regular Time Employee\n";
  cout<<"Emp id - "<< id<< endl;
  cout<<"Emp Name- "<< name<< endl;
  cout<<"Date of Joining "<< doj;
  cout<< endl;
  cout<<"Gross Salary "<< gsal;
  cout<< endl;
 }
};
int Regular :: HA = 3000;
int Regular :: DRA = 5000;

class Part_Time : public Employee {
 public :
 int hrs,gsal;
 static int pay;
 void calc() {
  cout<<"Enter Hrs. ";
  cin>>hrs;
  gsal = hrs*pay;
  }
  void disp() {
  cout<<"Part Time Employee ";
  cout<< endl;
  cout<<"Emp id - "<< id;
  cout<< endl;
  cout<<"Emp Name- "<< name;
  cout<< endl;
  cout<<"Date of Joining "<< doj;
  cout<< endl;
  cout<<"Gross Salary "<< gsal;
  cout<< endl;
 }
};
int Part_Time :: pay = 500;
int main() {
 cout<<"Enter Regular Emp Info\n";
 Regular r;
 r.input();
 r.calc();
 cout<<"Enter Part Time Emp Info\n";
 Part_Time p;
 p.input();
 p.calc();
 r.disp();
 p.disp();
 return 0;
}