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Current File : /home/caballoscriollos/public_html/espanol/library/PHPExcel/Examples/Quadratic2.php

<html>
<head>
<title>Quadratic Equation Solver</title>
</head>
<body>
<?php

/**	Error reporting		**/
error_reporting(E_ALL);

/**	Include path		**/
set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/../Classes/');

?>
<h1>Quadratic Equation Solver</h1>
<form action="Quadratic2.php" method="POST">
Enter the coefficients for the Ax<sup>2</sup> + Bx + C = 0
<table border="0" cellpadding="0" cellspacing="0">
	<tr><td><b>A&nbsp;</b></td>
		<td><input name="A" type="text" size="8" value="<?php echo (isset($_POST['A'])) ? htmlentities($_POST['A']) : ''; ?>"></td>
	</tr>
	<tr><td><b>B&nbsp;</b></td>
		<td><input name="B" type="text" size="8" value="<?php echo (isset($_POST['B'])) ? htmlentities($_POST['B']) : ''; ?>"></td>
	</tr>
	<tr><td><b>C&nbsp;</b></td>
		<td><input name="C" type="text" size="8" value="<?php echo (isset($_POST['C'])) ? htmlentities($_POST['C']) : ''; ?>"></td>
	</tr>
</table>
<input name="submit" type="submit" value="calculate"><br />
If A=0, the equation is not quadratic.
</form>

<?php
/**	If the user has submitted the form, then we need to execute a calculation **/
if (isset($_POST['submit'])) {
	if ($_POST['A'] == 0) {
		echo 'The equation is not quadratic';
	} else {
		/**	So we include PHPExcel to perform the calculations	**/
		include 'PHPExcel/Calculation.php';

		/**	Calculate and Display the results			**/
		echo '<hr /><b>Roots:</b><br />';

		$callStartTime = microtime(true);
		$discriminantFormula = '=POWER('.$_POST['B'].',2) - (4 * '.$_POST['A'].' * '.$_POST['C'].')';
		$discriminant = PHPExcel_Calculation::getInstance()->calculateFormula($discriminantFormula);

		$r1Formula = '=IMDIV(IMSUM(-'.$_POST['B'].',IMSQRT('.$discriminant.')),2 * '.$_POST['A'].')';
		$r2Formula = '=IF('.$discriminant.'=0,"Only one root",IMDIV(IMSUB(-'.$_POST['B'].',IMSQRT('.$discriminant.')),2 * '.$_POST['A'].'))';

		echo PHPExcel_Calculation::getInstance()->calculateFormula($r1Formula).'<br />';
		echo PHPExcel_Calculation::getInstance()->calculateFormula($r2Formula).'<br />';
		$callEndTime = microtime(true);
		$callTime = $callEndTime - $callStartTime;

		echo '<hr />Call time for Quadratic Equation Solution was '.sprintf('%.4f',$callTime).' seconds<br /><hr />';
		echo ' Peak memory usage: '.(memory_get_peak_usage(true) / 1024 / 1024).' MB<br />';
	}
}

?>

</body>
<html>

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