Question

. Q7. Write a C++ class called Point2D that describes a 2-dimensional (x,y) point. It should have the following features: • A constructor that accepts two double values (x,y) to create a point object. A default constructor. • A void print() method that prints out the points coordinates. • A void set(Point2D p) method that allows you to set the point using the given object of Point2D. • A Point2D midPoint(Point2D p1) method that returns a Point2D object that is the midpoint between this point and p1. Q8. Write the same class as for Q7, except in **Java** 29. Write a **Java** class containing a single method public static long sum(int N) which sums all the integers from 1 to N using recursion (do not use a loop). Q10. Write a simple **Java** class of your choosing, which illustrates inheritance and method overriding in Java.

Answer 1

Thanks for the question. Please post only 1 question at a time. As per HOMEWORKLIB POLICY, I am supposed to answer the first question and its first 4 subparts.

Please post Questions 8, 9, and 10 as a separate question, and I will help you in those as well.

====================================================================

// Question 7

class Point2D{
   private: double x, y;
   public:
       Point2D();
       Point2D(double x, double y);
       void print() const;
       void set(const Point2D &p);
       Point2D midPoint(Point2D &p);
      
      
};

// default constructor
Point2D::Point2D(): x(0), y(0){}

// parameterized constructor
Point2D::Point2D(double x, double y):x(x),y(y){}

// print function
void Point2D::print() const{cout<<"x = "<<x<<", y = "<<y<<endl;}

// copy constructor
void Point2D::set(const Point2D &p){
   x= p.x; y = p.y;  
}

// function returns the midpoint of the location
// that lies between the current point and Point2D p
Point2D Point2D::midPoint(Point2D &p){
   double mx = x+p.x;
   double my = y +p.y;
   return Point2D(mx/2, my/2);
}

====================================================================