该文是关于Codeforces Round #234A的题目，介绍了该题的题意、解题思路以及代码实现。
<?php $number = 0.49999999999999994; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); $number = 1.4999999999999998; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); $number = 4503599627370495.5; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); Resulted ...
ID: 65637 Updated by: requi...@php.net Reported by: productivepc at hotmail dot com Summary: Using division PHP_ROUND_HALF_UP rounds DOWN when working with 2 precision -Status: Feedback +Status: Not a bug Type: Bug Package: Math related Operating System: Windows 7 PHP Version: 5.5.3 ...