Google Answers: Why doesn't the "C" key work on this java calculator?

View Question

Q: Why doesn't the "C" key work on this java calculator? ( Answered, 0 Comments )

Question

Subject: Why doesn't the "C" key work on this java calculator?
Category: Computers > Algorithms
Asked by: lampware-ga
List Price: $2.00

Posted: 10 Sep 2004 20:30 PDT
Expires: 10 Oct 2004 20:30 PDT
Question ID: 399617

<html>
 <head>
  <title>
   Java Simple Calculator
  </title>
  <style>
   body, tr, td, input: {font-family:Fixed; color:blue}
  </style>
  <script language="JavaScript">
   <!--
    string="";
 
    function app( cc )
    {
      string += cc;
      document.form1.text1.value = string;
    }
 
    function clear( )
    {
      string = "";
      document.form1.text1.value = string;
    }
 
    function calc( )
    {
      if( string.length > 0 )
      {
        inp = "out=" + string;
        eval( inp );
      }
      else
        out = "0";
 
      document.form1.text1.value = out;
      string = "" + out;
    }
 
    function upda( )
    {
      string = "" + document.form1.text1.value;
    }
   //-->
  </script>
 </head>
 <body onLoad="clear()">
  <form name="form1" method="POST" onSubmit="{upda(); calc(); return false;}">
   <table border>
    <tr>
     <td colspan=5>
      <input type="text" style="font-family:Courier" size=18
maxlength=80 name="text1" value="" onChange="upda()">
     </td>
    </tr>
    <tr>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 7 "
onClick="app('7')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 8 "
onClick="app('8')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 9 "
onClick="app('9')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" / "
onClick="app('/')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" C "
onClick="clear()">
     </td>
    </tr>
    <tr>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 4 "
onClick="app('4')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 5 "
onClick="app('5')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 6 "
onClick="app('6')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" * "
onClick="app('*')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" ( "
onClick="app('(')">
     </td>
    </tr>
    <tr>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 1 "
onClick="app('1')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 2 "
onClick="app('2')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 3 "
onClick="app('3')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" - "
onClick="app('-')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" ) "
onClick="app(')')">
     </td>
    </tr>
    <tr>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" 0 "
onClick="app('0')">
     </td>
     <td>
      &nbsp;
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" . "
onClick="app('.')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" + "
onClick="app('+')">
     </td>
     <td align=center>
      <input type="button" style="font-family:Courier" value=" = "
onClick="calc()">
     </td>
    </tr>
   </table>
  </form>
 <body>
</html>

Answer

Subject: Re: Why doesn't the "C" key work on this java calculator?
Answered By: googleexpert-ga on 10 Sep 2004 21:03 PDT

Hi,
There seems to be a function name conflict between your "clear()" and 
Javascript's "clear()"

If you change your function "clear()" to something else like "fieldclear()",
it your calculator should work.

Reference:
http://www.mozilla.org/docs/dom/domref/dom_doc_ref42.html

Please let me know if you have anymore questions.
-googleexpert

Comments

There are no comments at this time.

Important Disclaimer: Answers and comments provided on Google Answers are general information, and are not intended to substitute for informed professional medical, psychiatric, psychological, tax, legal, investment, accounting, or other professional advice. Google does not endorse, and expressly disclaims liability for any product, manufacturer, distributor, service or service provider mentioned or any opinion expressed in answers or comments. Please read carefully the Google Answers Terms of Service.

If you feel that you have found inappropriate content, please let us know by emailing us at answers-support@google.com with the question ID listed above. Thank you.

Search Google Answers for

Google Home - Answers FAQ - Terms of Service - Privacy Policy