在 PHP 中加/除数字
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Add / Divide Numbers in PHP
提问by Zac Brown
I am working on a Facebook App that needs to be able to average three numbers. But, it always return 0 as the answer. Here is my code:
我正在开发一个需要能够平均三个数字的 Facebook 应用程序。但是，它总是返回 0 作为答案。这是我的代码：
$y = 100;
$n = 250;
$m = 300;
$number = ($y + $n + $m / 3);
echo 'Index: '.$number;
It always displays Index: 0
它总是显示索引：0
Any ideas?
有任何想法吗？
回答by zerkms
$y = 100;
$n = 250;
$m = 300;
$number = ($y + $n + $m) / 3;
echo 'Index: '.$number;
Also - you missed ;in the end of the first 3 lines
另外 - 你错过;了前 3 行的末尾
回答by casablanca
Your parentheses are grouped wrongly. You should be doing:
您的括号分组错误。你应该这样做：
$number = ($y + $n + $m) / 3;
回答by codaddict
Two problems:
两个问题：
You are missing ;at the end of these lines:
您;在这些行的末尾丢失了：
$y = 100
$n = 250
$m = 300
And to /has higher precedence than +so you need to do:
并且 to/具有更高的优先级+，您需要这样做：
$number = ($y + $n + $m) / 3;
