The document contains multiple C++ program examples showcasing various object-oriented programming concepts, including class definitions, data members, and member functions. It demonstrates operations such as accepting user input for account balances, calculating interest, sorting city populations, and implementing inheritance. The programs employ features like friend functions, pointers, and multiple inheritance to demonstrate practical applications of these concepts.

1. /*Program to declare class Account having data members as Account No.
and balance. Accept this data for 3 accounts and give interest of 10% where
balance is equal or greater than 5000 and display them*/
#include<iostream.h>
#include<conio.h>
class Account
{
public:
int acc_no,bal,inte;
void accept();
void display();
};
void Account::accept(void)
{
cout<<"tEnter the account number : ";
cin>>acc_no;
cout<<"tEnter the balance : ";
cin>>bal;
}
void Account::display(void)
{

2. cout<<"tThe account number is : "<<acc_no<<endl;
cout<<"tThe balance is : "<<bal<<endl;
}
void main()
{
int i;
clrscr();
Account a[3];
for(i=0;i<3;i++)
{
a[i].accept();
}
cout<<"*********************************************"<<endl;
for(i=0;i<3;i++)
{
if(a[i].bal>=5000)
{
a[i].inte=(a[i].bal*100)/10;

3. a[i].bal=a[i].bal+a[i].inte;
}
a[i].display();
cout<<"=============================================="<<endl;
}
getch();
}

4. OUTPUT

5. /*Program to declare a class city having data members as name and
population.Accept this data for 5 cities and display names of city
having highest population*/
#include<iostream.h>
#include<conio.h>
class city
{
public:
char name[20];
int population;
void accept()
{
cout<<"tEnter the Name of the city: ";
cin>>name;
cout<<"tEnter the population : ";
cin>>population;
}
void display()
{
cout<<"tName is : "<<name<<endl;

6. cout<<"tPopulation is : "<<population<<endl;
}
};
void main()
{
int i;
clrscr();
city c[5];
for(i=0;i<5;i++)
{
c[i].accept();
}
//sorting
for(i=0;i<5;i++)
{
for(int j=0;j<4;j++)
{
if(c[j].population<c[j+1].population)
{
city temp = c[j];

7. c[j]=c[j+1];
c[j+1]=temp;
}
}
}
for(i=0;i<5;i++)
{
c[i].display();
}
getch();
}

8. OUTPUT

9. /*Program for swapping contents using friend function*/
#include<iostream.h>
#include<conio.h>
class sample
{
private:
int x,y;
public:
void setdata(int a,int b)
{
x=a;
y=b;
}
void showdata()
{
cout<<"nnttx="<<x<<"nntty="<<y;
}
friend void swap(sample &s);
};
void swap(sample &s)
{
int temp;
temp=s.x;

10. s.x=s.y;
s.y=temp;
}
void main()
{
sample s;
int x1,x2;
clrscr();
cout<<"nnttEnter 2 Numbers:";
cin>>x1>>x2;
s.setdata(x1,x2);
cout<<"nnttBefore Swappingn";
s.showdata();
cout<<"nnttAfter Swappingn";
swap(s);
s.showdata();
getch();
}

11. OUTPUT

12. #include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
class emp
{
public:
int emp_no,sal;
char ch;
void accept()
{
cout<<"nnttEnter the number : ";
cin>>emp_no;
cout<<"nnttEnter the salary : ";
cin>>sal;
}
void display()
{
cout<<"nnttEnter another(Y/N) ? : ";
// cin>>ch;
}
};

13. void main()
{
char ch;
emp e,e1;
clrscr();
e.accept();
e.display();
// cout<<"Enter u r choice Y|N : ";
cin>>ch;
if(ch=='y' || ch=='Y')
{
e.accept();
e1.accept();
}
else
{
cout<<"nnttExit";
}
getch();
}

14. OUTPUT :

15. /**/
#include<iostream.h>
#include<conio.h>
class sample
{
static int r;
int p,d,i;
public:
void accept();
void display();
};
int sample::r;
void sample::accept()
{
cout<<"nnttEnter principal : ";
cin>>p;
cout<<"nnttEnter the rate of interest : ";
cin>>r;
cout<<"nnttEnter the duration : ";
cin>>d;
}

16. void sample::display()
{
i=p*d*r/100;
cout<<"nnttSimple Interest : "<<i;
}
void main()
{
clrscr();
sample s;
s.accept();
s.display();
getch();
}

17. OUTPUT :

18. #include<iostream.h>
#include<conio.h>
class base1
{
private:
int b1;
};
class base2
{
private:
int b2;
};
class derived:public base1,public base2
{
private:
int d1;
};
void main()
{
clrscr();
cout<<endl<<"nntt"<<sizeof(base1)<<endl<<"nntt"
<<sizeof(base2)<<endl<<"nntt"<<sizeof(derived);

19. getch();
}
OUTPUT:

20. /*Program to implement multiple inheritance. Assume suitable
member variables and member functions(using virtual base class*/
#include<iostream.h>
#include<conio.h>
class acc
{
private:
char name[20];
public:
void accept1()
{
cout<<"nnttEnter the name : ";
cin>>name;
}
void display1()
{
cout<<"nnttThe name is : "<<name;
}
};
class sav_a:virtual public acc

21. {
private:
int no;
public:
void accept2()
{
cout<<"nnttEnter the number : ";
cin>>no;
}
void display2()
{
cout<<"nnttThe number is : "<<no;
}
};
class cur_a:public virtual acc
{
private:
int a_no;
public:
void accept3()
{
cout<<"nnttEnter the a_no number : ";

22. cin>>a_no;
}
void display3()
{
cout<<"nnttThe a_no is : "<<a_no;
}
};
class fix_dip:public sav_a,public cur_a
{
private:
int rec_no;
public:
void accept4()
{
cout<<"nnttEnter rec number : ";
cin>>rec_no;
}
void display4()
{
cout<<"nnttThe rec number is : "<<rec_no;
}
};

23. void main()
{
clrscr();
fix_dip f;
f.accept1();
f.display1();
f.accept2();
f.display2();
f.accept3();
f.display3();
f.accept4();
f.display4();
getch();
}

24. OUTPUT :

25. /*Hierachical Inheriance*/
#include<iostream.h>
#include<conio.h>
class Employee
{
private:
char emp_nm[23];
int emp_id;
public:
void accept1()
{
cout<<"nnttEnter the Employee name : ";
cin>>emp_nm;
cout<<"nnttEnter the employee ID : ";
cin>>emp_id;
}
void display1()
{
cout<<"nnttThe employee Name is : "<<emp_nm;
Employee
ManagerWorker

26. cout<<"nnttThe employee ID is : "<<emp_id;
}
};
class worker:public Employee
{
private:
int sal;
public:
void accept2()
{
cout<<"nnttEnter the salary : ";
cin>>sal;
}
void display2()
{
cout<<"nnttThe salary is : "<<sal;
}
};
class Manager:public Employee
{
private:
int allowance;
public:

27. void accept3()
{
cout<<"nnttEnter the total allowance : ";
cin>>allowance;
}
void display3()
{
cout<<"nnttThe total allowance is : "<<allowance;
}
};
void main()
{
clrscr();
worker w;
w.accept1();
w.display1();
w.accept2();
w.display2();
Manager m;
m.accept1();
m.display1();
m.accept3();
m.display3();

28. getch();
}
OUTPUT :

30. /*Program to declare a class book containing data members
book_title,author_name and price. Accept and display the
information for one object of the class using pointer to that
object.*/
#include<iostream.h>
#include<conio.h>
class book
{
int price;
char title[14],name[20];
public:
void getdata()
{
cout<<"nnttEnter the title of the Book : ";
cin>>title;
cout<<"nnttEnter the name of the Author :
";
cin>>name;
cout<<"nnttEnter the price of the Book : ";
cin>>price;
}

31. void putdata()
{
cout<<"nnttThe title of the Book is :
"<<title;
cout<<"nnttThe name of the Book is :
"<<name;
cout<<"nnttThe price of the Book is :
"<<price;
}
};
void main()
{
book b,*p;
clrscr();
p=&b;
p->getdata();
p->putdata();
getch();
}

32. OUTPUT 

33. /*Program to declare a class ‘box’ having data members
height,width and breadth.Accept this information for one
object using pointer to that object. Display the area and
volume of that object.*/
#include<iostream.h>
#include<conio.h>
class box
{
int height,width,breadth;
public:
void getdata()
{
cout<<"nnttEnter the height : ";
cin>>height;
cout<<"nnttEnter the width : ";
cin>>width;
cout<<"nnttEnter the breadth : ";
cin>>breadth;
}
void area()
{

34. cout<<"nnttArea of the box is :
"<<breadth*width;
}
void volume()
{
cout<<"nnttVolume of the Box is :
"<<height*width*breadth;
}
};
void main()
{
clrscr();
box b,*p;
p=&b;
p->getdata();
p->area();
p->volume();
getch();
}

35. OUTPUT :  

36. /*program to declare a class birthday having data members day, month
and year. Accept this information for 4 object using pointer to the
array of object.*/
#include<iostream.h>
#include<conio.h>
class birthday
{
private:
int day,month,year;
public:
void getdata()
{
cout<<"ntEnter the Day : ";
cin>>day;
cout<<"ntEnter the Month : ";
cin>>month;
cout<<"ntEnter the Year : ";
cin>>year;
}
};
void main()
{

37. int i;
clrscr();
birthday *b[4];
for(i=0;i<4;i++)
{
b[i]->getdata();
}
getch();
}

38. OUTPUT 