The document contains 6 programs written in C++ demonstrating the use of classes and objects. Program 1 defines a Book class with private data members (page, price, title) and public member functions to get and display book details. Program 2 adds a setvalue function to modify object properties. Program 3 defines a Travel class to track distance and time with additional functions. Program 4 defines a Time class. Programs 5 and 6 demonstrate static class members and functions.

1. Comsats University of Science and Technology Islamabad
LAB WORK 4
Name:
Muhammad Tahir
Roll No:
Sp11-Bcs-107
Subject:
Object Oriented Programming (Oop)
Section:
3A
Submitted To:
Mam NusratShaheen
Date:27/03/2012

2. Program No:01
#include<iostream>
#include<conio.h>
using namespace std;
class book
{
private:
int page;
float price;
string title;
public:
voidgetvalue()
{
cout<<"Enter pages"<<endl;
cin>>page;
cout<<"Enter price"<<endl;
cin>>price;
cout<<"Enter title"<<endl;
cin>>title;
}
void display()
{
cout<<"Pages are= "<<page<<endl;
cout<<"Price are="<<price<<endl;
cout<<"Title is="<<title<<endl;
}

3. };
main()
{
book b1,b2,b3;
b1.getvalue();
b2.getvalue();
b3.getvalue();
book b3=b1;
b1.display();
b2.display();
b3.display();
getch();
return 0;
}
Program No: 02
#include<iostream>
#include<conio.h>
using namespace std;
class book
{
private:
int page;
float price;
string title;
public:
voidgetvalue()

4. {
cout<<"Enter pages"<<endl;
cin>>page;
cout<<"Enter price"<<endl;
cin>>price;
cout<<"Enter title"<<endl;
cin>>title;
}
voidsetvalue()
{ cout<<"Enter pages"<<endl;
cin>>page;
cout<<"Enter price"<<endl;
cin>>price;
cout<<"Enter title"<<endl;
cin>>title;
}
void display()
{
cout<<"Pages are= "<<page<<endl;
cout<<"Price are="<<price<<endl;
cout<<"Title is="<<title<<endl;
}
};
main()
{
book b1,b2,b3;

5. b1.getvalue();
b2.getvalue();
b3.getvalue();
b3=b1;
b1.display();
b2.display();
b3.display();
b3.setvalue();
b1.display();
b2.display();
b3.display();
getch();
return 0;
}
Program No: 03
#include<iostream>
#include<conio.h>
using namespace std;
class travel
{
private:
float km;
int h;
public:
travel():km(0),h(0)
{

6. }
voidgetvalue()
{
cout<<"Enter kilometer"<<endl;
cin>>km;
cout<<"Enter hour"<<endl;
cin>>h;
}
void show()
{
cout<<"Values are="<<km<<endl;
cout<<"Values are="<<h<<ebdl;
}
void add(t1,t2)
{
float sum=0;
sum=t1+t2;
cout<<sum;
}
};
main()
{
travel t1,t2,t3;
t1.getvalue();
t1.show();
t2.getvalue();

7. t2.show();
t3.add(t1,t2);
getch();
return 0;
}
Program No: 04
#include<iostream>
#include<conio.h>
using namespace std;
class time
{
private:
inthour,min,sec;
public:
time():km(0),h(0)
{
}
voidgetvalue()
{
cout<<"Enter hours"<<endl;
cin>>hour;
cout<<"Enter minute"<<endl;
cin>>min;
cout<<"Enter second"<<endl;
cin>>sec;
}

8. void show()
{
cout<<"Hours ="<<hour<<endl;
cout<<"Minute ="<<min<<endl;
cout<<"Second ="<<sec<<endl;
}
void add(hour,min,sec)
{
int sum=0;
sum=hour+min+sec;
cout<<"Addition of hours, minute and second is="<<sum;
}
};
main()
{
travelh,m,s,su;
h.getvalue();
h.show();
m.getvalue();
m.show();
s.getvalue();
s.show();
su.add(h,m,s);
getch();
return 0;
}

9. Program No: 05
#include<iostream.h>
#include<conio.h>
classcountr{
private:
int count;
public:
countr(){
count=0;}
voidincr(){
count++;}
void display(){
cout<<count;}};
void main(){
clrscr();
countr c1;
c1.incr();
c1.display();
c1.incr();
c1.display();
getch();
}
Program No: 06
#include<iostream.h>
#include<conio.h>
class student{

10. private:
staticint a;
public:
static void roll(int);
static void showroll();};
int student::a=157;
void student::roll(int roll){
a=roll;}
void student::showroll(){
cout<<"roll number is: "<<a<<"n";}
void main(){
clrscr();
student::roll(10);
student::showroll();
student::roll(11);
student::showroll();
student::roll(12);
student::showroll();
getch();}