Question

In C++

14.22 A dynamic class - party list

Complete the Party class with a constructor with parameters, a copy constructor, a destructor, and an overloaded assignment operator (=).

//main.cpp

#include <iostream>

using namespace std;

#include "Party.h"

int main()
{
return 0;
}

//party.h

#ifndef PARTY_H
#define PARTY_H

class Party
{
private:
string location;
string *attendees;
int maxAttendees;
int numAttendees;
  
public:
Party();
Party(string l, int num); //Constructor
Party(/*parameters*/); //Copy constructor
Party& operator=(/*parameters*/);
//Add destructor
void addAttendee(string name);
void changeAttendeeAt(string name, int pos);
void print();
string getAttendeeAt(int pos);
int getMaxAttendees() const;
int getNumAttendees() const;
string getLocation() const;
};

#endif

//party.cpp

#include <iostream>
#include <string>

using namespace std;

#include "Party.h"

Party::Party()
{
//Default: 10 attendees, location = home
location = "Home";
maxAttendees = 10;
numAttendees = 0;
attendees = new string[maxAttendees];
}

Party::Party(string l, int num)
{
//Complete constructor with parameters
//If num<1, set maxAttendees = 10
}

Party::Party(/*parameters*/)
{
//Complete copy constructor
}

Party& Party::operator=(/*parameters*/)
{
//Complete assignment
}

//Add destructor

//The following functions are provided
//Do not change

void Party::addAttendee(string name)
{
if(numAttendees < maxAttendees)
{
attendees[numAttendees] = name;
numAttendees++;
}
else
cout << "Your party is already full!\n";
}

void Party::changeAttendeeAt(string name, int pos)
{
if(pos>=0 && pos<numAttendees)
attendees[pos] = name;
else
cout << "Invalid index.";
}

void Party::print()
{
if(numAttendees > 0)
{
cout << "Attendees list:\n";
for(int i = 0; i<numAttendees; i++)
cout << attendees[i] << endl;
}
else
cout << "List is empty! Invite more people to your party.\n";
}

string Party::getAttendeeAt(int pos)
{
if(pos>=0 && pos<numAttendees)
return attendees[pos];
else
return "Invalid index.";
}

int Party::getNumAttendees() const
{ return numAttendees; }

int Party::getMaxAttendees() const
{ return maxAttendees; }

string Party::getLocation() const
{ return location; }

Answer 1

/* party.h */

#ifndef PARTY_H
#define PARTY_H

class Party
{

private:

string location;

string *attendees;

int maxAttendees;

int numAttendees;

public:

Party();

Party(string l, int num); //Constructor

Party(const Party &obj); //Copy constructor

Party& operator=(const Party &obj);

//Add destructor

~Party(); // destructor

void addAttendee(string name);

void changeAttendeeAt(string name, int pos);

void print();

string getAttendeeAt(int pos);

int getMaxAttendees() const;

int getNumAttendees() const;

string getLocation() const;

};

#endif

/* party.cpp */

#include <iostream>

#include <string>

using namespace std;

#include "Party.h"

Party::Party()

{

//Default: 10 attendees, location = home

location = "Home";

maxAttendees = 10;

numAttendees = 0;

attendees = new string[maxAttendees];

}

Party::Party(string l, int num)

{

location = l;

numAttendees = 0;

if(num < 1){

maxAttendees = 10;

}else{

maxAttendees = num;

}

attendees = new string[maxAttendees];

}

Party::Party(const Party &obj)

{

numAttendees = obj.numAttendees;

maxAttendees = obj.maxAttendees;

  attendees = new string[maxAttendees];

  for(int i = 0 ; i < numAttendees; i++){

    attendees[i] = obj.attendees[i];

  }

}

Party& Party::operator=(const Party &obj)

{

if (this != &obj) {

numAttendees = obj.numAttendees;

maxAttendees = obj.maxAttendees;

attendees = new string[maxAttendees];

for (int i=0; i<numAttendees; i++)

attendees[i] = obj.attendees[i];

}

return *this;

}

//Add destructor

Party::~Party(){ // destructor

delete [] attendees;

}

//The following functions are provided

//Do not change

void Party::addAttendee(string name)

{

if(numAttendees < maxAttendees)

{

attendees[numAttendees] = name;

numAttendees++;

}

else

cout << "Your party is already full!\n";

}

void Party::changeAttendeeAt(string name, int pos)

{

if(pos>=0 && pos<numAttendees)

attendees[pos] = name;

else

cout << "Invalid index.";

}

void Party::print()

{

if(numAttendees > 0)

{

cout << "Attendees list:\n";

for(int i = 0; i<numAttendees; i++)

cout << attendees[i] << endl;

}

else

cout << "List is empty! Invite more people to your party.\n";

}

string Party::getAttendeeAt(int pos)

{

if(pos>=0 && pos<numAttendees)

return attendees[pos];

else

return "Invalid index.";

}

int Party::getNumAttendees() const

{ return numAttendees; }

int Party::getMaxAttendees() const

{ return maxAttendees; }

string Party::getLocation() const

{ return location; }

/* main.cpp */ // I added code to check copy constructor

#include <iostream>

using namespace std;

#include "Party.h"

int main()

{

cout<<"Attendence List party p1\n";

Party p1("usa",3);

p1.addAttendee("George");

p1.addAttendee("zeo");

p1.addAttendee("tyson");

p1.print();

Party p2 = p1;

cout<<"Attendence List party p2 using copy Constructor\n";

p2.print();

return 0;

}

/* OUTPUT */

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