Answer / mahendra

Find the program below to demonstrate the composition.
first define the class called the DataBirth.
class DateOfBirth
{
public:
void UpdateDMY();
void GetDMY();
private:
int date,month,year;
};
define the Employee class.
class Employee
{
public:
void GetDetails();
void UpdateDetails();


private:
DateOfBirth BirthDate;
}
Here the EMployee class is having the object of the
DateOfBirth class as data member. With this the Employee
class is achieving the "has-a" relation with the
DateOfBorth class. In this way the Employee class can have
objects of the many calsses as members.

Answer / jojo

#ifndef POINT2D_H
#define POINT2D_H

#include <iostream>

class Point2D
{
private:
int m_nX;
int m_nY;

public:
// A default constructor
Point2D()
: m_nX(0), m_nY(0)
{
}

// A specific constructor
Point2D(int nX, int nY)
: m_nX(nX), m_nY(nY)
{
}

// An overloaded output operator
friend std::ostream& operator<<(std::ostream& out, const
Point2D &cPoint)
{
out << "(" << cPoint.GetX() << ", " << cPoint.GetY()
<< ")";
return out;
}

// Access functions
void SetPoint(int nX, int nY)
{
m_nX = nX;
m_nY = nY;
}

int GetX() const { return m_nX; }
int GetY() const { return m_nY; }
};

#endif

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Name an advantage of linked list over array?

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What normal C constructs work differently in C++?

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