#include <iostream>
#include <string>

//////////////////////////////////////////////////////
///
///  Usage:
///
///    fib 10
///
///  Computes the 10th fibonacci number (with a slow algorithm!).
///  Works for numbers other than 10 too.
///
///  Below demonstrates how to use the call_graph facility,
///  See include/call_graph.h and bin/show_call_graph for more info.
///
//////////////////////////////////////////////////////

#define call_graph_file "fib_call_graph"   
#include "call_graph.h"

using std::cout;

int fib(int n) {
  call_decl("fib", n);

  if (n <= 1)  return call_return(n);
  else  return call_return(fib(n-1) + fib(n-2));
}

int main(int argc, char *argv[]) {

  int n = 5;

  if (argc > 1) n = atoi(argv[1]);

  cout << "fib(" << n << ") = " <<fib(n) << "\n";
}