Hello

import std.stdio;
private import std.c.time;
public abstract class Form {
protected double radius;
protected abstract double berechneFlaeche();
}


public class Kreis : Form {
public double berechneFlaeche() {
return 3.14 * this.radius * this.radius;
}
}

int main( char[][] arg ) {
//Form kreis = new Kreis();
Kreis kreis = new Kreis();
kreis.radius=2.0;
writefln("Kreisflaeche = %f",kreis.berechneFlaeche());

return 0;
}

I can instantiate kreis with
Form kreis = new Kreis();
and
Kreis kreis = new Kreis();
I get the same output:
Kreisflaeche = 12.560000

Is there any difference to do that?

> I can instantiate kreis with
> Form kreis = new Kreis();
> and
> Kreis kreis = new Kreis();
> I get the same output:
> Kreisflaeche = 12.560000
> 
> Is there any difference to do that?

No there is no difference in initialization. Only the "new Kreis()" is the initialization. The assignment is only an assignment of a reference with an optional/implicite cast.

Frank

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