cs304 solution

OOP 2nd SOL



#include

#include

#include

class citizen

{

char name[50];

char nationality[50];

public:

citizen()

{

strcpy(name,"Farhan");

strcpy(nationality,"Pakistani");

}

citizen(char name1[],char nationality1[])

{

strcpy(name,name1);

strcpy(nationality,nationality1);

}

citizen(const citizen& obj)

{

strcpy(name,obj.name);

strcpy(nationality,obj.nationality);

}

void display()

{

cout<<"\n"<

..............

2nd sol



#include

using namespace std;

class Citizen{

private:

string name;

string nationality;

public:

Citizen(string n,string nat)

{name=n;

nationality=nat;

}

Citizen()

{name="name";

nationality="nation";

}

Citizen(const Citizen &n)

{name=n.name;

nationality=n.nationality;

}

void display()

{cout<

..................

#include

using namespace std;



//class definition

class citizen

{

//hidden part

private:

string name; //for citizen's name

string nationality; //for nationality

// visiable interface

public:

//paramterless constructor

citizen()

{

name = "Farhan" ;

nationality = "pakistani";

}

//may be written as

/*

citizen()

{

name="name";

nationality="nation";

}



*/



//parameterized constructor



citizen(string nam,string nationty)

{

name=nam;

nationality=nationty;

}

//copy constructor



citizen(const citizen &obj)

{

name=obj.name;

nationality=obj.nationality;



}

//to displaying name and nationality

void display()

{

cout<
cout<
cout<
cout<<" \n";

}

~citizen()

{

cout<<"\ndestructor called\n";

}



};



int main()

{



citizen c1;

citizen c2("Mark", "Australian");

citizen c3(c2);

// the code can also be written as if coomented constructor is used



/*citizen c1("Farhan","Pakistan"),c2("Mark","Austrailia"),c3(b);

c1.display();

c2.display();

c3.display();*/



system("pause");

return 0;

getch();

}

...............

Write a C++ program in which you are required to define a class named Citizen. The class must include the following two data members.

// data member for Citizen Name

1: Name



//data member for Citizen Nationality

2: Nationality



Your Program should define three constructors for the class Citizen



1: a constructor with no parameter

2: a constructor with two parameters (name, nationality)

3: a copy constructor



All of these three constructors are meant to initialize their respective objects. Incase of copy constructor, you are required to assign a separate space for the data members of the new object while copying the values of previously existed object.



Declare three objects (1 for each type of constructor) in main.



Write a function in class Citizen to display the initialized data members for each object.



Also write destructor for the class Citizen. Display a message that says “destructor called” in the destructor body.



Note:- Make use of comments in source code where you use constructors , objects, copy constructors and destructors.



OUTPUT



Your output should be similar to the following



Farhan

Pakistani

_________________

Mark

Australian

_________________

Mark

Australian

_________________



Where;

Farhan

Pakistani



are the initialized against the constructor with no parameters.



Mark

Australian



are the initialized values against the constructor with two parameters.



Mark

Australian



are the initialized values against the copy constructor that copies the values of already existed object.