quadrangle.cpp

#include <iostream>

using namespace std;

class quadrangle {
public:
  class vertex {
    friend class quadrangle;
    friend ostream& operator<<(ostream& os, const quadrangle::vertex& vertex);
  private:
    int _x;
    int _y;
  public:
    vertex();
    vertex(int x, int y);
  };

  // member
  static vertex origin;

  // constructor
  quadrangle(vertex p1, vertex p3);
  quadrangle(vertex p1, vertex p2, vertex p3, vertex p4);

  // function
  void draw();
  void move(vertex vertex);

private:
  // member
  vertex _p1; // lower-left
  vertex _p2;
  vertex _p3; // upper-right
  vertex _p4;
};

quadrangle::vertex quadrangle::origin = quadrangle::vertex(0, 0);

ostream& operator<<(ostream& os, const quadrangle::vertex& vertex) {
  cout << '(' << vertex._x << ',' << vertex._y << ')';
}

quadrangle::vertex::vertex() {
  _x = 0;
  _y = 0;
}

quadrangle::vertex::vertex(int x, int y) {
  _x = x;
  _y = y;
}

quadrangle::quadrangle(vertex p1, vertex p3) {
  _p1 = p1;

  _p2._x = p3._x;
  _p2._y = p1._y;

  _p3 = p3;

  _p4._x = p1._x;
  _p4._y = p3._y;
}

quadrangle::quadrangle(vertex p1, vertex p2, vertex p3, vertex p4) {
  _p1 = p1;
  _p2 = p2;
  _p3 = p3;
  _p4 = p4;
}

void quadrangle::draw() {
  // TODO: area
  cout << _p1 << '\t'
       << _p2 << '\t'
       << _p3 << '\t'
       << _p4 << "\t"
       << "area: TODO";
}

void quadrangle::move(vertex vertex) {
  // TODO
  cout << "Distance: " << "TODO" << endl;
}

int main()
{
  quadrangle q1(quadrangle::vertex(0,0),
                quadrangle::vertex(3,2),
                quadrangle::vertex(10,7),
                quadrangle::vertex(8,10));
  quadrangle q2(quadrangle::vertex(3,6), quadrangle::vertex(10,9));
  cout << "q1 information" << endl;
  q1.draw();
  cout << endl;
  cout << "q2 information" << endl;
  q2.draw();
  cout << endl;
  cout << "q1 move to (5,5) " << endl;
  q1.move(quadrangle::vertex(5,5));
  cout << "q1 information" << endl;
  q1.draw();
  cout << endl;
  quadrangle::origin = quadrangle::vertex(-5, 3);
  cout << "q2 move to (-1,2) " << endl;
  q2.move(quadrangle::vertex(-1,2));
  cout << "q2 information" << endl;
  q2.draw();
  cout << endl;

  return 0;
}