import std.stdio;

struct Fib {
	private int _value;

	int value() {
		if(_value <= 2)
			return 1;

		scope f1 = Fib(_value - 1);
		scope f2 = Fib(_value - 2);

		return f1.value() + f2.value();
	}
}

void main()
{
	foreach (i; 0 .. 10) {
		scope x = Fib(40);
		writefln("n=", x.value);
	}
}