Spring Semester 2004

Help with your Homework Seven:

Here's another JSP from a while ago: 

<% int count, right; String message = "Hello and welcome to the addition quiz!"; 
   if (session.getAttribute("count") == null || request.getParameter("reset") != null) { 
     session.setAttribute("count", new Integer(0)); count = 0; 
     session.setAttribute("right", new Integer(0)); right = 0; 
   } else { 
     count = ((Integer)(session.getAttribute("count"))).intValue(); 
     right = ((Integer)(session.getAttribute("right"))).intValue(); 
     try { 
        if (Integer.parseInt(request.getParameter("answer")) == ((Integer)(session.getAttribute("answerKey"))).intValue())
              right += 1;
        else 
              right += 0; 
     } catch (Exception e) { } 
     count += 1; 
     message = right + " out of " + count; 
     if (count == 10) { 
       message = "Final result: " + message + ". New game started "; count = 0; right = 0; 
     } else 
       message = "Your performance thus far: " + message;
     session.setAttribute("count", new Integer(count)); 
     session.setAttribute("right", new Integer(right)); 
   }
   int one = (int) (Math.random() * 100 - 50), 
       two = (int) (Math.random() * 100 - 50); 
   session.setAttribute("answerKey", new Integer(one + two)); 
 %>
<html>

<body>
<form action="<%=request.getContextPath() + request.getServletPath()%>">
  <%=message%> <p> 
  Question <%=count+1%>. <%=one%> + <%=two%> = <input type="text" name="answer"> <p> 
  <input type="submit" value="Proceed"> <input type="submit" name="reset" value="Reset"> <p> 

</form>

</body>
</html>
It is clean and compact, and a pleasure to study (I hope).

(The long lines, you ask? Aye (for one) am really really happy it's so easy to use them on the web.)

Updated by Adrian German for A348/A548