#1 Calculadora FF Sáb Out 26, 2013 7:31 pm
Admin
Admin
Ótima calculadora, muito útil
- Código:
<?
if(!isset($_POST["Calcular"])){
echo"";
}
else{
$n1 = $_POST['n1'];
$n2 = $_POST['n2'];
$opcao = $_POST['opcao'];
if($opcao == "0"){
$resultado = $n1+$n2;
}
elseif($opcao == "1"){
$resultado = $n1-$n2;
}
elseif($opcao == "2"){
$resultado = $n1*$n2;
}
elseif($opcao == "3"){
$resultado = $n1/$n2;
}
}
?>
<form name="calculo" method="post" action="index.php">
<table width="300" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td>Resultado</td>
<td><input name="textfield" type="text" value="<? echo "$resultado"; ?>" disabled="disabled"></td>
</tr>
<tr>
<td align="right"> </td>
<td>
<input name="n1" type="text" id="n1" value="<? echo "$n1"; ?>">
</td>
</tr>
<tr align="center">
<td colspan="2">
<select name="opcao">
<option value="0" <? if($opcao == "0"){echo "selected";} ?>>Soma</option>
<option value="1" <? if($opcao == "1"){echo "selected";} ?>>Subtrair</option>
<option value="2" <? if($opcao == "2"){echo "selected";} ?>>Multiplicar</option>
<option value="3" <? if($opcao == "3"){echo "selected";} ?>>Dividir</option>
</select> Por:
</td>
</tr>
<tr>
<td align="right"> </td>
<td><input name="n2" type="text" id="n2" value="<? echo "$n2"; ?>"></td>
</tr>
<tr align="center">
<td colspan="2"><input type="submit" name="Calcular" value="Calcular"></td>
</tr>
</table>
</form>