static void fibonacci(channel <int> c, channel <int> quit)
{
int x = 0, y = 1;
while (true)
{
if (c.Sent(x))
{
var _y1 = x + y;
x = y;
y = _y1;
}
else if (quit.Received(out _))
{
fmt.Println("quit");
return;
}
}
}