php+html 实现加减乘除
首先创建一个.php的文档
<HTML>
<HEAD>
<TITLE>表单数据传递</TITLE>
</HEAD>
<BODY>
<?php
if (isset($_POST["tag"])){
$addend1=$_POST["addend1"];
$addend2=$_POST["addend2"];
$method =$_POST["method"];
}else{
$addend1=0;
$addend2=0;
$method ="+";
}
switch ($method){
case "+":
$result = $addend1 + $addend2;
break;
case "-":
$result = $addend1 - $addend2;
break;
case "x":
$result = $addend1 * $addend2;
break;
case "/":
$addend2 = $addend2 == 0? 1: $addend2;
$result = $addend1 / $addend2;
break;
case "%":
$addend2 = $addend2 == 0? 1: $addend2;
$result = $addend1 % $addend2;
break;
default:
$method ="+";
$result = $addend1 + $addend2;
}
?>
<meta charset="utf-8">
<form name="form1" method="post" action="#">
<!--下面是一个隐藏表单，接收后用以来判断是提交前的页面还是提交后的页面-->
<input type="hidden" name="tag" size="4" value="1">
<input type="text" name="addend1" size="4" value="<?php echo $addend1;?>">
<select name="method">
<option value="+"<?php if($method=="+")echo " selected="selected"";?>>+</option>
<option value="-"<?php if($method=="-")echo " selected="selected"";?>>-</option>
<option value="x"<?php if($method=="x")echo " selected="selected"";?>>x</option>
<option value="/"<?php if($method=="/")echo " selected="selected"";?>>/</option>
<option value="%"<?php if($method=="%")echo " selected="selected"";?>>%</option>
</select>
<input type="text" name="addend2" size="4" value="<?php echo $addend2;?>">
=
<?php echo $result;?><br>
<br><input type="submit" name="button1" value="计算">
</form>
</BODY>
</HTML>声明：该文观点仅代表作者本人，牛骨文系教育信息发布平台，牛骨文仅提供信息存储空间服务。
