// -*- mode: c++ -*- | |
// $Id$ | |
// http://www.bagley.org/~doug/shootout/ | |
#include <iostream> | |
#include <stdlib.h> | |
using namespace std; | |
unsigned long fib(unsigned long n) { | |
if (n < 2) | |
return(1); | |
else | |
return(fib(n-2) + fib(n-1)); | |
} | |
int main(int argc, char *argv[]) { | |
#ifdef SMALL_PROBLEM_SIZE | |
#define LENGTH 40 | |
#else | |
#define LENGTH 43 | |
#endif | |
int n = ((argc == 2) ? atoi(argv[1]) : LENGTH); | |
cout << fib(n) << endl; | |
return(0); | |
} |