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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;thinkin&nbsp;(强强),&nbsp;信区:&nbsp;Linux&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;calculator&nbsp;&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Thu&nbsp;Feb&nbsp;17&nbsp;11:00:36&nbsp;2000)&nbsp;<BR>&nbsp;<BR>&lt;form&nbsp;action=&quot;&nbsp;&nbsp;&lt;?&nbsp;echo&nbsp;$PHP_SELF&nbsp;?&gt;&quot;&nbsp;method=&quot;post&quot;&gt;&nbsp;<BR>1st&nbsp;number:&lt;input&nbsp;type=text&nbsp;name=num1&gt;&lt;br&gt;&nbsp;<BR>2nd&nbsp;number:&lt;input&nbsp;type=text&nbsp;name=num2&gt;&lt;br&gt;&nbsp;<BR>&lt;p&gt;&nbsp;<BR>What&nbsp;operation&nbsp;would&nbsp;you&nbsp;like&nbsp;to&nbsp;perform?&lt;br&gt;&nbsp;<BR>&lt;input&nbsp;type=radio&nbsp;name=operation&nbsp;value=&quot;plus&quot;&nbsp;checked&gt;Add&lt;br&gt;&nbsp;<BR>&lt;input&nbsp;type=radio&nbsp;name=operation&nbsp;value=&quot;minus&quot;&gt;Subtract&lt;br&gt;&nbsp;<BR>&lt;input&nbsp;type=radio&nbsp;name=operation&nbsp;value=&quot;X&quot;&gt;Multiply&lt;br&gt;&nbsp;<BR>&lt;input&nbsp;type=radio&nbsp;name=operation&nbsp;value=&quot;divided&nbsp;by&quot;&gt;Divide&lt;br&gt;&nbsp;<BR>&lt;input&nbsp;type=submit&gt;&lt;input&nbsp;type=reset&gt;&nbsp;<BR>&lt;/form&gt;&nbsp;<BR>&lt;/body&gt;&nbsp;<BR>&lt;/html&gt;&nbsp;<BR>The&nbsp;answer&nbsp;to&nbsp;&nbsp;&nbsp;&nbsp;&lt;?&nbsp;echo&nbsp;$num1;?&gt;&nbsp;&nbsp;&nbsp;&nbsp;&lt;?echo&nbsp;$operation;?&gt;&nbsp;&nbsp;&nbsp;&nbsp;&lt;?&nbsp;echo&nbsp;$num2;?&gt;&nbsp;<BR>&nbsp;is:&lt;br&gt;&nbsp;<BR>&lt;h1&gt;&nbsp;<BR>&lt;?php&nbsp;<BR>if&nbsp;($operation&nbsp;==&nbsp;&nbsp;&nbsp;&quot;plus&quot;)&nbsp;<BR>{$x&nbsp;=&nbsp;$num1&nbsp;+&nbsp;$num2;&nbsp;<BR>print&nbsp;$x;}&nbsp;<BR>elseif&nbsp;($operation&nbsp;==&nbsp;&nbsp;&nbsp;&quot;minus&quot;)&nbsp;<BR>{$x&nbsp;=&nbsp;$num1&nbsp;-&nbsp;$num2;&nbsp;<BR>print&nbsp;$x;}&nbsp;<BR>elseif&nbsp;($operation&nbsp;==&nbsp;&nbsp;&nbsp;&quot;X&quot;)&nbsp;<BR>{$x&nbsp;=&nbsp;$num1&nbsp;*&nbsp;$num2;&nbsp;<BR>print&nbsp;$x;}&nbsp;<BR>else&nbsp;<BR>{$x&nbsp;=&nbsp;$num1&nbsp;/&nbsp;$num2;&nbsp;<BR>print&nbsp;$x;}&nbsp;<BR>?&gt;&nbsp;<BR>&lt;/h1&gt;&nbsp;<BR>--&nbsp;<BR>&nbsp;<BR>人生到处知何似？&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;应似飞鸿踏雪泥。&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;泥上偶然留指爪，&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鸿飞那复计东西！&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;<BR>※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;smth.org·[FROM:&nbsp;162.105.37.191]&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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