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Copy pathlesson5.php
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lesson5.php
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<?php
if(isset($_POST['a']) && isset($_POST['b'])){
switch($_POST['select']){
case "plus":
$result = $_POST['a'] + $_POST['b'];
break;
case "minus":
$result = $_POST['a'] - $_POST['b'];
break;
case "mult":
$result = $_POST['a'] * $_POST['b'];
break;
case "segm":
if($_POST['b'] == 0) {
$result = "Деление на ноль невозможно!";
}
else{
$result = $_POST['a'] / $_POST['b'];
}
break;
}
}
?>
<html>
<head>
<title>Сумматор</title>
</head>
<body>
<form method="post" action="lesson5.php">
<!--<input type="text" name="a" value=" <?php echo $_POST['a'];?>" required>
<?php echo " + ";?>
<input type="text" name="b" value=" <?php echo $_POST['b'];?>" required>
<input type="submit" name="equal" value="=">
<?php echo $result;?>-->
<input type="text" name="a" value=" <?php echo $_POST['a'];?>" required>
<select name="select">
<option selected disabled>Выберите операцию</option>
<option value="plus">+</option>
<option value="minus">-</option>
<option value="mult">*</option>
<option value="segm">/</option>
</select>
<input type="text" name="b" value=" <?php echo $_POST['b'];?>" required>
<input type="submit" name="equal" value="=">
<?php echo $result;?>
</form>
</body>
</html>