/* Write a Cylinder class whose objects can be characterised by two double values: one to denote the radius and the other to denote the height of a cylinder. a) Provide a constructor without parameters which would initialise the class fields to some default values, and another constructor which would take two parameters and initialise the fields to the values specified by the user. */

public class Cylinder {

  private double radius; // data field. private so that only stuff in this class can access it
  private double height; // save as above

  public Cylinder () {radius = 0.0; height = 0.0;} // constructor with no arguments - note: you don't need to specify a return type for constructors
  public Cylinder (double a, double b) {radius = a; height = b;} // constructor with two arguments

  // this is a method (a method is just what a function in a class is called. it's public, so any other class can call it, and it allows other classes to change the data stored in this class.
  // e.g., say in another class you had something like 'Cylinder awesome = new Cylinder();'
  // to change the cylinder radius, you could then go 'awesome.changeRadius(1.0);'
  public void changeRadius (double i) {
    radius = i;
  }

  //same as above
  public void changeHeight (double i) {
    height = i;
  }

}