stack, error = import("stack.noja");
print(error, "\n");
Stack     = stack.Stack;
makeStack = stack.makeStack;
StackIterator = stack.StackIterator;
makeStackIterator = stack.makeStackIterator;

s1 = makeStack(int);
s1->push(1);
s1->push(2);
s1->push(3);
print(toString(s1), "\n");

iter = makeIterator(s1);
print(toString(iter), "\n");
while (val, key = iter->next()) != none:
	print(key, " => ", val, "\n");