Two problems in debugging: results var "cannot be resolved" & if stmt syntax error

(There is another page that "number1", "number2" and "operator" come from)

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 <!doctype html public "=//W3C/DTD HTML 4.U Transitional//EN")

<html>

<head>

<title>Simple Calculator</title>

</head>
 
<%@ page import="java.lang.Double" %>

<%@ page language="java" errorPage="" %>
 
<body>
 
<%

    String num1=request.getParameter("number1");

    String num2=request.getParameter("number2");

    String operator=request.getParameter("operator");
 
    Double.parseDouble(num1);

    Double.parseDouble(num2);

%>
 
<h1>Simple Calculator</h1>
 
<%! public static double getResult(Double num1, Double num2, String operator)

{    
 
    if(operator.equals("add")) {

        double result=num1+num2;

    } else if(operator.equals("subtract")) {

        double result=num1-num2;

    } else if(operator.equals("multiply")) {

        double result=num1*num2;

    } else {

        double result=num1/num2;

    }

}

%>
 
<form action="lab02Form.jsp" method="get">
 
<table cellspacing="5">

    <tr>

        <td align="right">Enter a Number: </td>

        <td><input type="text"name="num1" value="num1">

        </td>

    </tr>

    <tr>

        <td align="right">Enter Another Number: </td>

        <td><input type="text"name="num2" value="num2">

        </td>

    </tr>

    <tr>

        <td align="right">Select an Operator: </td>

        <td>

        <select>

        <option value="add">add</option>

        <option value="subtract">subtract</option>

        <option value="multiply">multiply</option>

        <option value="divide">divide</option>

        </select>

        </td>

    </tr>
 
    <tr>

        <td align="right">Result: </td>

        <td><input type="text"name="result" value="<%=result%">>

        </td>

    </tr>
 
    <tr>

        <td></td>

        <td><input type="submit" value="Reset">

        </td>
 
        <td></td>

        <td><input type="submit" value="Compute">

        </td>

    </tr>

</table>        
 
</body>
 
</html>

Sep 23 '10 #1

Subscribe Reply

1750

RamananKalirajan

608

512MB

You have done a mistake here

Expand|Select|Wrap|Line Numbers

<input type="text"name="result" value="<%=result%">>

actually it should be like this

Expand|Select|Wrap|Line Numbers

<input type="text"name="result" value="<%=result%>" />

I dont find any problem with if statement.

Thanks and Regards
Ramanan Kalirajan

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