#!/usr/bin/env php
  
  <?php
  
  if(! isset($argv[1]) || ! is_numeric($argv[1]) || intval($argv[1]) <= 0){
  	printf("Usage: %s nbr_int
      nbr_int: Un nombre entier supérieur à 0
  ", $argv[0]);
  	exit(1);
  }
  
  $nbr_int = intval($argv[1]);
  
  $a = 0;
  $b = 1;
  
  while ($b < $nbr_int) {
  	printf("%d
  ", $b);
  	$b = $a + $b;
  	$a = $b - $a;
  }
  
  printf("b/a = %1.15f
  ", $b/$a);
  
  exit(0);