检查我的数学！ [英] Check my math!

问题描述

有人请说明当我开始告诉我2不等于2时，我落入了这个替代宇宙这个下午
下午。


不确定关于你，但是当我运行它时，它告诉我59001.31并不是
等于59001.31。将等式的每一边改为一个或两个

并检查。改变它，它不会。


_What_在这里发生了什么？！


<？php

$ subtotal = 59001.31;

$ principal = 58605.33;

$ interest = 395.98;

$ check = $ principal + $ interest;

echo（"< pre>"）;

echo（" Check："。$ check。" \ n"） ;

echo（" Subtotal："。$ subtotal。" \ n"）;

if（$ check！= $ subtotal）{

echo（" Check（"。$ check。"）不等于小计（"。

$ subtotal。"）"）; //检查不等于小计

}

else {

echo（" Check（"。$ check。" ）等于小计（。$ subtotal。

）"）; //检查确实等于小计

}

echo（"< / pre>"）;

？>


-

Craig Bailey，通讯协调员

佛蒙特州住房金融局（VHFA）

164 St. Paul St.，PO方框408

Burlington，Vt.05402-0408

电子邮件： cb *** **@vhfa.org |网址： www.vhfa.org

电话：[phone] |传真：[phone]

Someone please explain what alternate universe I fell into this
afternoon when PHP started telling me that 2 doesn''t equal 2.

Not sure about you, but when I run this, it tells me 59001.31 doesn''t
equal 59001.31. Change each side of the equation by a hundreth or two
and it checks. Change it a bit more, and it won''t.

_What_ is going on here?!

<?php
$subtotal=59001.31;
$principal=58605.33;
$interest=395.98;
$check=$principal+$interest;
echo("<pre>");
echo("Check: " . $check . "\n");
echo("Subtotal: " . $subtotal . "\n");
if($check!=$subtotal) {
echo("Check (" . $check . ") does not equal subtotal (" .
$subtotal . ")"); // Check doesn''t equal subtotal
}
else {
echo("Check (" . $check . ") equals subtotal (" . $subtotal .
")"); // Check does equal subtotal
}
echo("</pre>");
?>

--
Craig Bailey, Communications Coordinator
Vermont Housing Finance Agency (VHFA)
164 St. Paul St., P.O. Box 408
Burlington, Vt. 05402-0408
Email: cb*****@vhfa.org | Web: www.vhfa.org
Phone: [phone] | Fax: [phone]

推荐答案

subtotal = 59001.31;

subtotal=59001.31;

principal = 58605.33;

principal=58605.33;

interest = 395.98;

interest=395.98;

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