EMPLOYEE DATABASE~(Solution to E Balagurusamy Problem 8.3) :-

#include <iostream>
#include <stdlib.h>
using namespace std;
class staff
{
protected:
    char name[20],id[5];
    int age;
};

class teacher:public staff
{
protected:
    char subject[10];
public:
    void getinfo()
    {
        cout<<"\nEnter Name: ";
        cin>>name;
        cout<<"Enter Age: ";
        cin>>age;
        cout<<"Enter Employee ID: ";
        cin>>id;
        cout<<"Enter Subject of Publication: ";
        cin>>subject;
    }
    void putinfo()
    {
        cout<<"Name: "<<name;
        cout<<"\nAge: "<<age;
        cout<<"\nEmployee ID: "<<id;
        cout<<"\nSubject: "<<subject;
    }
};

class typist:public staff
{
protected:
    int speed;;
public:
    void typ()
    {
        cout<<"Enter Typing Speed(Out of 5): ";
        cin>>speed;
    }
};

class regular:public typist
{
protected:
    int salary;
public:
    void inp()
    {
        typ();
        cout<<"Enter Monthly Salary: ";
        cin>>salary;
    }
    void outp()
    {
        cout<<"\nTyping Speed:" <<speed;
        cout<<"\nAnnual Salary: "<<salary*12;
    }
};

class casual:public typist
{
protected:
    int days,sal;
public:
    void getdata()
    {
        typ();
        cout<<"Enter Number of Working Days: ";
        cin>>days;
        cout<<"\nEnter Salary per Day: ";
        cin>>sal;
    }
    void showdata()
    {
        cout<<"\nTyping Speed:" <<speed;
        cout<<"\nTotal Salary:"<<sal*days;
    }
};

class officer:public staff
{
protected:
    char grade;
public:
    void getd()
    {
        cout<<"Enter Grade: ";
        cin>>grade;
    }
    void display()
    {
        cout<<"\nGrade: "<<grade;
    }
};

int main()
{
    system("COLOR D");
    char ch;
    cout<<"\t******EMPLOYEE DATABASE******\n";
    teacher t;
    t.getinfo();
    cout<<"Enter Typist Choice:(r/c)\n";
    cout<<"R:Regular Typist  C:Casual Typist\n";
    cin>>ch;
    if(ch=='r'||ch=='R')
    {
        regular s;
        s.inp();
    }
    else
    {
        casual s;
        s.getdata();
    }
    officer x;
    x.getd();
    cout<<"\n\n\t****Employee Information****\n";
    t.putinfo();
    if(ch=='r'||ch=='R')
    {
        regular s;
        s.outp();
    }
    else
    {
        casual s;
        s.showdata();
    }
    x.display();
    return 0;
}