class named {string name;}
class pt3 extends named{int x,y,z;}
pt3 a = ("forward", 1,2,3);
pt3 b = ("reverse", z@1, y@2, x@3);
pt3 c = (y@1, x@2, z@3, name@"mixed");
print(a);
print(b);
print(c);

class iNamed {string name;}
class iPt3 extends iNamed
    {
    int x,y,z;
    to init(string n, int x,y,z)
    // Curiously if  make parameter n here "name" you get error
    // message about name being redefined.
        {
	self.name = n + "100";
	self.x = x + 100;
	self.y = y + 100;
	self.z = z + 100;
	}
    }
iPt3 ia = ("forward", 1,2,3);
iPt3 ib = ("reverse", z@1, y@2, x@3);
iPt3 ic = (y@1, x@2, z@3, n@"mixed");
print(ia);
print(ib);
print(ic);

to liftIntoSpace(string payload, double grams, double kilometersHigh,
	string sponsor="Lockheed", int id=3)
    {
    print("Attempting to lift " + grams + " gram cargo into an orbit of ");
    print(kilometersHigh + " kilometers.  Sponsored by " + sponsor + ". ");
    print("Launch id code " + id);
    }

liftIntoSpace("10 frisbees", 298.1, 12.3, "UC Santa Cruz", 689);
liftIntoSpace("10 frisbees", grams@298.1, kilometersHigh@12.3, 
	sponsor@"UC Santa Cruz", id@689);
liftIntoSpace(
	sponsor@"UC Santa Cruz", 
	grams@298.1, 
	kilometersHigh@12.3, 
	payload@"10 frisbees", 
	id@689);
liftIntoSpace(
	grams@298.1, 
	kilometersHigh@12.3, 
	payload@"10 frisbees", 
	id@689);
liftIntoSpace(
	sponsor@"UC Santa Cruz", 
	grams@298.1, 
	kilometersHigh@12.3, 
	payload@"10 frisbees");