Polymorphism: Difference between revisions

c.x //Evaluates to 12</lang>

=={{header|Elena}}==

<lang elena>import extensions.

class Point

{

int prop X :: _x.

int prop Y :: _y.

constructor new(IntNumber x, IntNumber y)

[

_y := y.

]

constructor new

<= new(0,0).

print [ console printLine("Point") ]

}

class Circle :: Point

{

int prop R :: _r.

constructor new

<= new(0).

constructor new(IntNumber r)

<= new(0, 0, r).

constructor new(IntNumber x, IntNumber y, IntNumber r)

<= new(x, y);

_r := r.

]

print [ console printLine("Circle") ]

}

[

var p := Point new.

var c := Circle new.

p print.

c print.

{{out}}

<pre>