Recursion.

Q1. /*Write a program to sum of N number using recursion*/

using namespace std;

int nsum(int n){

if (n==0){//base condintion

return 0;

int rec=n+nsum(n-1);//recursive condition

return rec;

int main(){

int n;

cout<<"Enter the number=";

cin>>n;

int sum=nsum(n);

cout<<"sum="<<sum;

return 0;

Q2. Write a program to find factorial number using recursion.

using namespace std;

int nfact (int factorial){

return 1;

int rac=factorial*nfact(factorial-1);

return rac;

int main(){

int factorial;

cout<<"Any Naturial number=";

cin>>factorial;

int fact=nfact(factorial);

cout<<"factorial="<<fact;

return 0;

Q3.write a program to Fibonnaci series using recursion.

#include<iostream>

using namespace std;

void printFibonacci(int n){

static int n1=0, n2=1, n3;

if(n>0){

n3 = n1 + n2;

n1 = n2;

n2 = n3;

cout<<n3<<" ";

printFibonacci(n-1);
 }

int main(){

int n;

cout<<"Enter the number of elements: ";

cin>>n;

cout<<"Fibonacci Series: ";

cout<<"0 "<<"1 ";

printFibonacci(n-2);

return 0;

Object Oriented Programming in C++ (OOPS).

using namespace std;

class Book{

public:

string title;

string author;

float price;

};

int main(){

Book bookdetail;

bookdetail.title="Ramayan";
 bookdetail.author ="Walmiki";

bookdetail.price=452010;

cout<<bookdetail.title<<endl;

cout<<bookdetail.author<<endl;

cout<<bookdetail.price<<endl;

return 0;

Q2.write a program to make a calculator using class.

using namespace std;

class calculator{

private:

int x;

int y;

public:

void getdata(){

cout<<"Enter a first number:";

cin>>x;

cout<<"Enter a secomd number:";

cin>>y;

void display(){

cout<<"x="<< x <<endl;
 cout<<"y="<<y<<endl;

cout<<"sum="<<sum()<<endl;

cout<<"Difference="<<diff()<<endl;

cout<<"Multiplication="<<mul()<<endl;

cout<<"Division="<<div()<<endl;

int sum(){

return(x+y);

int diff(){

return(x-y);

int mul(){

return(x*y);

int div(){

return(x/y);

};

int main(){

calculator Cl;

Cl.getdata();

Cl.display();

Cl.sum();

Cl.diff();

Cl.mul();

Cl.div();

}
Q3. Write a program to car detail using class.
#include<iostream>

using namespace std;

class Myclass{

public:

string brand ;

string modle;

int year;

};

int main(){

Myclass myobj;

myobj.brand = "BMW";

myobj.modle= "X7";

myobj.year =1987;

Myclass myobj1;

myobj1.brand="Audi";

myobj1.modle="X45";

myobj1.year=1998;

cout<<myobj.brand<<endl;

cout<<myobj.modle<<endl;

cout<<myobj.year<<endl;

cout<<myobj1.brand<<endl;

cout<<myobj1.modle<<endl;
 cout<<myobj1.year<<endl;

Q3.write a program to print day month and year.

using namespace std;

class date{

public:

int day;

int month;

int year;

};

int main(){

date dl;

dl.day=17;

dl.month= 9;

dl.year=2004;

cout<<dl.day<<"/"<<dl.month<<"/"<<dl.year<<endl;

return 0;

}
 Member Function
(i) inside function (.)

#include <iostream>
using namespace std;

class MyClass {
public:
void myMethod() {
cout << "Hello World!";
}
};

int main() {
MyClass myObj;
myObj.myMethod();
return 0;
}

(ii) Outside function (::)

class MyClass {
 public:
void memberFunctionOutside();
};
void MyClass::memberFunctionOutside() {
cout << "Outside member function ." << endl;
}
int main() {
MyClass obj;
obj.memberFunctionOutside();
return 0;
}

Constructor.
(i) Default constructor
#include <iostream>
using namespace std;
class Person{
private:
string name;
int age;
public:
Person()
{
cout<<"Default constructor :"<<endl;
name = "Anand";
age = 20;
}
void display()
{
cout<<"Name of current object: "<<name<<endl;
cout<<"Age of current object: "<<age<<endl;
}
};
int main()
{
Person obj;
obj.display();
return 0;
}
(ii) Parameterized Constructor.
#include <iostream>

using namespace std;

class Person{

private:

string name;

int age;

public:

Person(string person_name)

cout<<"Constructor to set name is called"<<endl;

name = person_name;

age = 12;

Person(int person_age)

cout<<"Constructor to set age is called"<<endl;

name = "Student";

age = person_age;

Person(string person_name, int person_age)

cout<<"Constructor for both name and age is called"<<endl;

name = person_name;
 age = person_age;

void display()

cout<<"Name of current object: "<<name<<endl;

cout<<"Age of current object: "<<age<<endl;

cout<<endl;

};

int main()

Person obj1("First person");

obj1.display();

Person obj2(25);

obj2.display();

Person obj3("Second person",15);

obj3.display();

return 0;

(iii) Copy constructor

using namespace std;

private:

string name;

int age;

public:

Person(string person_name, int person_age)

cout<<"Parametrized Constructor"<<endl;

name = person_name;

age = person_age;

Person(const Person& obj)

cout<<"Copy constructor "<<endl;

name = obj.name;

age = obj.age;

void display()

cout<<"Student name : "<<name<<endl;

cout<<"Age of student : "<<age<<endl;

cout<<endl;

};

int main()

Person obj1("Anand ",20);

obj1.display();
 Person obj2(obj1);

obj2.display();

return 0;

(iv) Dynamic constructor .

using namespace std;

class Person{

private:

int* age;

public:

Person(int* person_age)

cout<<"Dynamic Constructor:"<<endl;

age = new int;

age = person_age;

void display()

cout<<"Age of current object: "<<*age<<endl;

};

int main()

int age = 25;

Person obj1(&age);

obj1.display();

return 0;

Destructor
#include <iostream>

using namespace std;

class class_name{

private:

int a,b;

public:

class_name(int aa, int bb)

cout<<"Constructor value :"<<endl;

b = bb;

cout<<"Value of a: "<<a<<endl;

cout<<"Value of b: "<<b<<endl;

cout<<endl;

~class_name()

cout<<"Destructor value :"<<endl;

cout<<"Value of a: "<<a<<endl;

cout<<"Value of b: "<<b<<endl;

};

int main()

class_name obj(5,6);

return 0;

Inheritance.
Q. Write a program on Single Inheritance in class .
#include<iostream>

using namespace std;

class Animal{
 public:

Animal(){

cout<<"This is animal ."<<endl;

};

class dog : public Animal{

public:

dog(){

cout <<"Dog always barks .";

};

int main(){

dog d1;

return 0;

Q. Write a program on Multiple Inheritance in class .

using namespace std ;

class Animal{

public:

Animal(){
 cout<<"This is Animal ."<<endl ; }

};

class Mammal{

public:

Mammal(){

cout<<"This is Mammal ."<<endl;

};

class dog : public Mammal , public Animal{

public:

dog(){

cout<<"Dog always barks . "<<endl;

};

int main(){

dog d1;

return 0;

Write a program on Multilevel Inheritance in class .

using namespace std ;

class wood{
 public:

wood(){

cout<<"Wood are made from tree ."<<endl;

};

class furniture : public wood{

public:

furniture(){

cout<<"Furniture are made from Wood ."<<endl;

};

class table : public furniture{

public:

table(){

cout<<"Table is type of furniture . "<<endl;

};

int main(){

table t1;

return 0;

Q. Write a program on Hierarchical Inheritance in class .

using namespace std ;

class Animal {

public:

Animal() {

cout << "Animal is eating ." << endl;

};

class Dog : public Animal {

public:

Dog() {

cout << "Dog is barking ." << endl;

};

class Cat : public Animal {

public:

Cat() {

cout << "Cat is meowing ." << endl;

};

int main(){

Cat c1;

Dog d1;

return 0;

}
Q. Write a program on Hybrid Inheritance in class .
#include<iostream>

using namespace std;

class grandparent{

public:

grandparent(){

cout<<"Grandparents love their child and grandchild."<<endl;

};

class parent : virtual public grandparent{

public:

parent(){

cout<<"Parent take care of their child"<<endl;

};

class child: public parent, virtual public grandparent{

public:

child(){

cout<<"Child should give respect to his parents and grandparents."<<endl;

};
int main(){

child obj;

return 0;