<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Potenze - Gianfranco Oddenino</title>
<link rel="stylesheet" type="text/css" href="stile.css">
</head>
<body>
<%@ include file="WEB-INF/jspf/header.jspf"%>
<%@ include file="WEB-INF/jspf/menu.jspf"%>
<div id="content">
<h2>Potenze</h2>
<form action="potenze.jsp" method="get">
Inserisci un numero <input type="text" name="n"/><br/>
Seleziona l'operazione
<select name="op">
<option value="2">Quadrato</option>
<option value="3">Cubo</option>
<option value="4">Radice quadrata</option>
</select><br/>
<input type="reset" value="Cancella" />
<input type="submit" value="Calcola" />
</form>
<% String valore = request.getParameter("n");
if (valore != null) {
int n = Integer.parseInt(valore);
%>
<p>n = <%=n%><br />
<% int op = Integer.parseInt(request.getParameter("op"));
switch (op) {
case 2: %>n² = <%=n * n %><% break;
case 3: %>n³ = <%=n * n * n %><% break;
case 4: %>n½ = <%=Math.sqrt(n)%><% break;
}
}
%>
</p>
</div>
<%@ include file="WEB-INF/jspf/footer.jspf"%>
</body>
</html>