Question

Hello,

Please provide the source code in C++.

Must be in 3 different files, please distinguish by comments.: class definitions (session.h), main program (session_main.cpp), and function definitions (session_defs.cpp).

Define a class called Date with month, day and year as its data. Member functions must include a constructor, destructor, overloading function for < and ==, and for insertion (>>) and extraction (<<) for reading and displaying data.

Also, define a class called Appointment for a consultant (or lawyer) to keep track of her appointments. Include a description (string) and a Date for the appointment date. Include same member functions as for Date.

Let's say now we realize that we need a class called Session for meeting clients. Session, like Appointment, needs a Date and a description, but it also has duration in hours and an hourly charge that can be set for different client types and sessions. Since Session has things in common with Appointment (date and description), instead of developing a new class altogether, we decide to derive it from Appointment and add its additional data and any other member functions it needs, to save on code.

Besides the data it inherits from Appointment, Session would also have client_name, hourly_charge (dollar amount) and hours (number of hours spent in session). Make any required modifications to Appointment class (Hint: to make the inherited data accessible to the derived class, but private from others).

Include for the Session class, a constructor, destructor (even if it has to have an empty body), set() for setting data, read() for reading data from keyboard, print() for displaying the data and get_charge() for computing the charges due for the session (hours * hourly_rate).

Provide a menu in main so the user can:

1) create and add new Sessions to an array of Session pointers at run time and enter data for it,

2) display all added Sessions

3) Search for a client name in the array of Session pointers and display the charge

4) display the total charge for all clients and the average hours spent

5) quit the menu.

Must be in 3 different files, please distinguish by comments.: class definitions (session.h), main program (session_main.cpp), and function definitions (session_defs.cpp).

A sample interaction between the user and the program:

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 1

Enter description: landlord Jones vs tenant Dominguez for non payment of rent

Enter appointment date: 4/1/2019

Enter client name: Mark Jones

Enter hourly charge: $300.00

Enter hours: 2.5

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 1

Enter description: Brown against neighbor Smith

Enter client name: Mike Brown

Enter appointment date: 4/5/2019

Enter hourly charge: $300.00

Enter hours: 3

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 1

Enter description: Bryant vs. Simpson

Enter appointment date: 4/10/2019

Enter client name: Henry Simpson

Enter hourly charge: $300.00

Enter hours: 3.5

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 2

List of scheduled sessions:

landlord Jones vs tenant Dominguez for non payment of rent

Date: 4/1/2019

Client name: Mark Jones

Hourly charge: $300.00

Enter hours: 2.5

Charge: $750.00

Brown against neighbor Smith

Client name: Mike Brown

Date: 4/5/2019

Hourly charge: $300.00

Hours: 3

Charge: $900.00

Bryant vs. Simpson

Date: 4/10/2019

Client name: Henry Simpson

Hourly charge: $300.00

Hours: 3.5

Charge: $1050.00

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 3

Enter client name: Mike Brown

Brown against neighbor Smith

Date: 4/5/2019

Hourly charge: $300.00

Hours: 3

Charge: $900.00

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 4

Total charges: $2700.00

Average hours: 3

Select one of the following actions:

1) Add new Session

2) Display all Sessions

3) Search for a client

4) Display total charges for all clients and the average hours spent

5) Quit the menu

Enter your selection: 5

Answer 1

The following are the contents of the three program files. File name is written as a comment before the start of each file. The program accepts description and names and strings which can have spaces. It accepts Date in the format [day]/[month]/[year]. The hourly charge is accepted as a decimal number which is interpreted as the cost in dollars.

/*session.h*/

#include <iostream>
using namespace std;

class Date
{
private:
   int month;
   int day;
   int year;

public:
   Date(){}
   Date(int d, int m, int y);
   ~Date(){}
   friend bool operator < (Date d1, Date d2);
   friend bool operator == (Date d1, Date d2);
   friend ostream& operator << (ostream& out, const Date& d);
   friend istream& operator >> (istream& in, Date& d);
};

class Appointment
{
protected:
   string description;
   Date date;

public:
   Appointment(){}
   Appointment(string desc, Date d);
   ~Appointment(){}
   // essentially compares the dates of the two appointments
   friend bool operator < (Appointment a1, Appointment a2);
   friend bool operator == (Appointment a1, Appointment a2);
   friend ostream& operator << (ostream& out, const Appointment& a);
   friend istream& operator >> (istream& in, Appointment& a);
};

class Session : public Appointment
{
private:
   string client_name;
   float hourly_charge;
   float hours;

public:
   Session(){read();}
   Session(string cname, float hcharge, float h, string desc, Date d) :
       Appointment(desc, d),client_name(cname),hourly_charge(hcharge),hours(h){}
   ~Session(){}
   void set(string cname, float hcharge, float h, string desc, Date d);
   string get_name();
   float get_hours();
   void read();
   void print();
   float get_charge();

};

/*session_defs.cpp*/

#include "session.h"
#include <iostream>
using namespace std;
Date::Date(int d, int m, int y)
{
   // validation of the date can be added here
   day = d;
   month = m;
   year = y;
}

bool operator < (Date d1, Date d2)
{
   if(d1.year != d2.year)
   {
       return d1.year < d2.year;
   }
   if(d1.month != d2.month)
   {
       return d1.month < d2.month;
   }
   return d1.day!=d2.day;
}
bool operator == (Date d1, Date d2)
{
   if(d1.year==d2.year && d1.month==d2.month && d1.day==d2.day)
       return true;
   else
       return false;
}
ostream& operator << (ostream& out, const Date& d)
{
   out<<d.day<<"/"<<d.month<<"/"<<d.year;
   return out;
}
istream& operator >> (istream& in, Date& d)
{
   string s;
   in>>s;
   d.day = 0;
   int i = 0;
   while(s[i]!='/')
   {
       d.day = d.day*10+(s[i]-'0');
       i++;
   }
   i++;
   d.month = 0;
   while(s[i]!='/')
   {
       d.month = d.month*10+(s[i]-'0');
       i++;
   }
   i++;
   d.year = 0;
   while(i<s.size())
   {
       d.year = d.year*10 + (s[i]-'0');
       i++;
   }
   return in;
}

Appointment::Appointment(string desc, Date d)
{
   description = desc;
   date = d;
}

bool operator < (Appointment a1, Appointment a2)
{
   return a1.date < a2.date;
}
bool operator == (Appointment a1, Appointment a2)
{
   return a1.date == a2.date;
}
ostream& operator << (ostream& out, const Appointment& a)
{
   out<<"Date of appointment: "<<a.date<<endl;
   out<<a.description;
   return out;
}
istream& operator >> (istream& in, Appointment& a)
{
   cout<<"Description: ";
   cin.ignore();
   getline(in,a.description);
   in>>a.date;
   return in;
}

void Session::set(string cname, float hcharge, float h, string desc, Date d)
{
   client_name = cname;
   hourly_charge = hcharge;
   hours = h;
   description = desc;
   date = d;
}

void Session::read()
{
   cout<<"Enter description: ";
   cin.ignore();
   getline(cin,description);
   cout<<"Enter appointment date: ";
   cin>>date;
   cout<<"Enter client name: ";
   cin.ignore();
   getline(cin,client_name);
   cout<<"Enter hourly charge: ";
   cin>>hourly_charge;
   cout<<"Enter hours: ";
   cin>>hours;
}

void Session::print()
{
   cout<<description<<endl;
   cout<<"Date: ";
   cout<<date<<endl;
   cout<<"Client name: ";
   cout<<client_name<<endl;
   cout<<"Hourly charge: $";
   cout<<hourly_charge<<endl;
   cout<<"Hours: ";
   cout<<hours<<endl;
   cout<<"Charge: $";
   cout<<get_charge()<<endl;

}

string Session::get_name()
{
   return client_name;
}

float Session::get_hours()
{
   return hours;
}
float Session::get_charge()
{
   return hours * hourly_charge;
}

/*session_main.cpp*/

#include "session.h"
#include <iostream>
#include <vector>
using namespace std;
int main()
{
   int choice;
   string name;
   vector<Session*> arr;
   Session* s;
   float total_charge;
   float total_hours;
   while(true)
   {
       cout<<"Select one of the following actions: \n";
       cout<<"1. Add new Session\n";
       cout<<"2. Display all Sessions\n";
       cout<<"3. Search for a client\n";
       cout<<"4. Display total charges for all clients and the average hours spent\n";
       cout<<"5. Quit the menu\n";
      
       cout<<"Enter your selection: ";
       cin>>choice;

       switch(choice)
       {
       case 1:
           arr.push_back(new Session());
           break;
       case 2:
           cout<<"List of scheduled sessions: \n";
           for(int i = 0; i<arr.size(); i++)
           {
               arr[i]->print();
           }
           break;
       case 3:
           cout<<"Enter name: ";
           cin.ignore();
           getline(cin,name);
           for(int i = 0; i<arr.size(); i++)
           {
               if(arr[i]->get_name()==name)
               {
                   arr[i]->print();
               }
           }
           break;
       case 4:
           total_charge = 0;
           total_hours = 0;
           for(int i = 0; i<arr.size(); i++)
           {
               total_charge += arr[i]->get_charge();
               total_hours += arr[i]->get_hours();
           }

           cout<<"Total charges: $"<<total_charge<<endl;
           cout<<"Average hours: "<<total_hours/arr.size()<<endl;
           break;
       case 5:
           return 0;
       }
   }
   return 0;
}