void main()
{
  int n, fib;

  int fibonacci(int x)
  {
    switch (x)
      {
	case 0:
	case 1:
	  return 1;
	default:
	  return fibonacci(x - 1) + fibonacci(x - 2);
      }
  }

  n = 25;
  fib = fibonacci(n);

  println("fibonacci(", n, ") = ", fib);

  if (fib != 121393)
    println("O que nao esta' certo, devia ter dado 121393");
  else
    println("O que esta' certo.");
}