class Point {
public double x;
public double y;
public Point(double px, double py) {
this.x = px;
this.y = py;
}
public double distanceTo(Point other) {
double dx = this.x - other.x;
double dy = this.y - other.y;
return Math.sqrt(dx * dx + dy * dy);
}
}

class Circle {
public Point center;
public double radius;
public Circle(Point c, double r) {
this.center = c;
this.radius = r;
}
public double area() {
return 3.14159 * this.radius * this.radius;
}
public double circumference() {
return 2.0 * 3.14159 * this.radius;
}
}

class Rectangle {
public double width;
public double height;
public Rectangle(double w, double h) {
this.width = w;
this.height = h;
}
public double area() {
return this.width * this.height;
}
public double perimeter() {
return 2.0 * (this.width + this.height);
}
public double diagonal() {
return Math.sqrt(this.width * this.width + this.height * this.height);
}
}

Point p1 = new Point(0.0, 0.0);
Point p2 = new Point(3.0, 4.0);
p1.distanceTo(p2)

Circle c = new Circle(new Point(0.0, 0.0), 5.0);
c.area()
c.circumference()

Rectangle r = new Rectangle(3.0, 4.0);
r.area()
r.perimeter()
r.diagonal()

%classes
%whos
%quit