Exercise 8

Task 8.1

Design and implement a class to represent points in 2D space. Invent suitable methods. Verify the behaviour in simple application. Draw class diagram.

Help

Attributes

• double x,y;

Methods

• set x,y coordinates according to polar ones
• set coordinates copying another object
• distance from the origin
• distance from the another point
• angle calculation (polar coordinates)
• move point - add dx, dy to the coordinates
• print coordinates in the form [x,y]

class Point
{
 public:
  double x,y;
  void set_polar(double dist, double angle); // angle in rad
  void set(Point &point); // copy coordinates from the parameter
  double distance(Point &p);
  ...
  void move(double dx, double dy);
  void print();
}

Inspire how to creat main application:

int main(int argc, char **argv)
{
  Point p1;

  cout << "Enter x coordinate: ";
  cin >> p1.x;
  cout << "Enter y coordinate: ";
  cin >> p1.y;
  
  cout << "Entered point: [" << p1.x << "," << p1.y << "]\n";
  cout << "Distance from the origin: " << p1.distance() << endl;
  cout << "Angle: " << p1.get_angle() << " rad\n";
  Point p2;
  p2.x = 10; p2.y = 5;
  cout << "Distance between "; p1.print(); cout << " and "; p2.print(); cout << ": ";
  ...
  return 0;
}

Solution:

Library:	point.h, point.cpp
Application:	app_point.cbp, app_point.cpp