<%@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>