let 

class account
{:
 private
   pin:int,
   bal:int
 public
   function make(i:int, p:int) =
     (bal := i; pin := p; printf("%d\n",pin))
   function withdraw(x:int) = 
     (bal := bal - x)
   function deposit(x:int) = 
     (bal := bal + x)
   function inquiry() : int = bal
:}

class c2
{:
private
   x:int
public
   function make(i:int) = (x := i; printf("class c2, x=%d\n",x))
:}

var mya:account := 0   % :=0 is meaningless here
var yoa:account := 0
var myc2:c2 := 0

function f() : int = 4

in
myc2.make(6);
mya.make(100,3421);
yoa.make(200,1234);
mya.withdraw(40);
yoa.deposit(50);
printf("My balance is %d\n",mya.inquiry());
printf("Your balance is %d\n",yoa.inquiry())
end
$