convert binary to decimal an vise versa

kasu · 11-04-2009, 06:01 PM

hi..

need convert decimal to binary and viser versa using on change attribute ...
can someone help me

Philip M · 11-04-2009, 06:24 PM

Google is your friend!

http://www.javascriptkit.com/script/...nconvert.shtml

http://javascript.internet.com/misce...o-decimal.html

It is your responsibility to die() if necessary….. - PHP Manual

jmrker · 11-04-2009, 07:21 PM

Alternative code, just because I working and am a slow typist.

Code:

<html>
<head>
<title>Binary Conversion</title>

<script type="text/javascript">
// For: http://codingforums.com/showthread.php?t=181347

function Dec_Bin(val) { return parseInt(val,10).toString(2); }
function Bin_Dec(val) { return parseInt(val,2).toString(10); }
</script>

</head>
<body>
Binary: <input type="text" id="bin" value='1010'>
<button
 onclick="document.getElementById('dec').value=Bin_Dec(document.getElementById('bin').value)"> Bin to Dec</button>
<button onclick="document.getElementById('bin').value = ''">Clear</button>

<br>
Decimal: <input type="text" id="dec" value=''>
<button
 onclick="document.getElementById('bin').value=Dec_Bin(document.getElementById('dec').value)"> Dec to Bin</button>
<button onclick="document.getElementById('dec').value = ''">Clear</button>
</body>
</html>

Can make similar functions for HEX and OCT conversions.

kasu · 11-04-2009, 11:16 PM

Thanks a lot for the reply..but the problem I have is how do you do it using "onchange" attribute rather than using buttons..and converting either decimal or binary to a hexadecimal...working all this time but did not get it ryt!!

Old Pedant · 11-05-2009, 12:21 AM

The only things important to know are that you can convert text to number using any radix (base) using:

Code:

var num = parseInt( text, radix );

So you read binary with a radix of 2, decimal with a radix of 10, hex with a radix of 16.

To convert *from* a number to text in the proper base/radix, you just put the radix in the toString():

Code:

var text = num.toString( radix );

And whether you use a button or onchange or onblur or whatever has no impact on those functions and their results.

jmrker · 11-05-2009, 02:49 AM

Quote:

Originally Posted by kasu

hi..

need convert decimal to binary and viser versa using on change attribute ...
can someone help me

Show what you want to do so we can make a recommendation as to how to do it.

kasu · 11-05-2009, 04:02 AM

need to have 2 text boxes ..one to enter the decimal..an the other displays the corresponding binary value and viser versa..

Old Pedant · 11-05-2009, 06:58 AM

Code:

<form>
Enter decimal: 
    <input name="decimal" onchange="this.form.binary.value=(parseInt(this.value,10)).toString(2);">
<hr>
Enter binary:
    <input name="binary" onchange="this.form.decimal.value=(parseInt(this.value,2)).toString(10);">
</form>

This really is the same code jmrker showed you, you know. Only the way it is "triggered" is different. PLEASE don't tell us this is homework for some class.

kasu · 11-09-2009, 03:04 PM

how do you perform this coding with a for loop..
<html>

<head>
<title> Dice Stats </title>
<script type="text/javascript"
src="http://random.js">
</script>
<script type="text/javascript">
function RollRepeatedly()
// Assumes: repsBox contains a number
// Results: simulates that many dice rolls, displays # of doubles
{
var doubleCount, totalRolls, repCount, roll1, roll2;

doubleCount = 0; // INITIALIZE THE COUNTER

totalRolls = document.getElementById("repsBox").value;
totalRolls = parseFloat(totalRolls);

repCount = 0;
while (repCount < totalRolls) { // REPEATEDLY:
roll1 = RandomInt(1, 6); // SIMULATE THE DICE ROLLS
roll2 = RandomInt(1, 6);

if (roll1 == roll2) { // IF DOUBLES,
doubleCount = doubleCount + 1; // INCREMENT THE COUNTER
}

repCount = repCount + 1; // INCR. REPETITION COUNTER
}

document.getElementById("countBox").value = doubleCount; // display #
}
</script>

</head>

<body>
<div style="text-align:center">
<h2>Dice Stats</h2>
<p>
Desired number of rolls =
<input type="text" id="repsBox" size="6" value="1000" />
</p>

<p>
<input type="button" value="Click to Roll" onclick="RollRepeatedly();" />
</p>
<p>
Number of doubles obtained =
<input type="text" id="countBox" size="6" value="0" />
</p>
</div>
</body>
</html>

jmrker · 11-09-2009, 03:47 PM

Beginning to look like a homework assignment ...
See: http://www.webdeveloper.com/forum/sh...d.php?t=219590

Kor · 11-09-2009, 04:15 PM

Quote:

Originally Posted by kasu

how do you perform this coding with a for loop..

I guess Old Pedant already gave you all the information you need.

To convert a value from a base to decimal:

Code:


parseInt(value,base)

To convert a value from decimal to a base:

Code:

value.toString(base)

The way you could perform that within a loop is a different thing, and I guess you should open another thread or, hm... that should be an easy task even for a beginner.

kasu · 11-19-2009, 04:02 AM

hi wondering a start to this ...just give me a idea plzz to create the following
*
***
*****
*******
*****
***
*

*
* *
* *
* *
* *
* *
*

the above diagram is displayed incorrectly on the thread..plzz refer the page source of this page LINE 3105 COlUMN 3 to get the correct picture

Old Pedant · 11-19-2009, 07:09 AM

LOL! So you and Dartz101 are in the same class:

http://www.codingforums.com/showthread.php?t=182173

Tell me, which of you is getting the better grade?

And, I also answered this last question from yet another student in your same class:
http://www.codingforums.com/showthread.php?t=182091

He seems to be doing better than either you or Dartz101, no?

Where the heck is this class, anyway??

kasu · 11-19-2009, 09:38 AM

i have no idea as to who is dartz101...and i checked the link uve posted but it does not have any relation to what my question is..and the second link aint workin...

.. I just wanted to create a diamond using asterix ....and i hope some one give me an idea to start off..i dont want any of u 2 do my homework..but hope a help from some one ..that will be great coz am a beginner..

Kor · 11-19-2009, 10:06 AM

Quote:

Originally Posted by kasu

i have no idea as to who is dartz101...and i checked the link uve posted but it does not have any relation to what my question is..and the second link aint workin...

.. I just wanted to create a diamond using asterix ....and i hope some one give me an idea to start off..i dont want any of u 2 do my homework..but hope a help from some one ..that will be great coz am a beginner..

1. This should be a different problem, so stop this then go and open another thread.
2. We hardly wait to see what you have done so far - your code I mean - in order to help you.

11-04-2009, 06:01 PM	PM User \| #1
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	convert binary to decimal an vise versa hi.. need convert decimal to binary and viser versa using on change attribute ... can someone help me

11-04-2009, 06:24 PM	PM User \| #2
Philip M Master Coder Join Date: Jun 2002 Location: London, England Posts: 7,092 Thanks: 85 Thanked 836 Times in 817 Posts	Google is your friend! http://www.javascriptkit.com/script/...nconvert.shtml http://javascript.internet.com/misce...o-decimal.html It is your responsibility to die() if necessary….. - PHP Manual Last edited by Philip M; 11-04-2009 at 06:27 PM..

11-04-2009, 11:16 PM	PM User \| #4
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	Thanks a lot for the reply..but the problem I have is how do you do it using "onchange" attribute rather than using buttons..and converting either decimal or binary to a hexadecimal...working all this time but did not get it ryt!! Last edited by kasu; 11-04-2009 at 11:19 PM..

11-05-2009, 12:21 AM	PM User \| #5
Old Pedant Senior Coder Join Date: Feb 2009 Location: Snohomish, WA Posts: 4,061 Thanks: 18 Thanked 660 Times in 652 Posts	The only things important to know are that you can convert text to number using any radix (base) using: Code: var num = parseInt( text, radix ); So you read binary with a radix of 2, decimal with a radix of 10, hex with a radix of 16. To convert from a number to text in the proper base/radix, you just put the radix in the toString(): Code: var text = num.toString( radix ); And whether you use a button or onchange or onblur or whatever has no impact on those functions and their results. __________________ "Old age and cunning win out over youth and enthusiasm every time."

11-05-2009, 06:58 AM	PM User \| #8
Old Pedant Senior Coder Join Date: Feb 2009 Location: Snohomish, WA Posts: 4,061 Thanks: 18 Thanked 660 Times in 652 Posts	Code: <form> Enter decimal: <input name="decimal" onchange="this.form.binary.value=(parseInt(this.value,10)).toString(2);"> <hr> Enter binary: <input name="binary" onchange="this.form.decimal.value=(parseInt(this.value,2)).toString(10);"> </form> This really is the same code jmrker showed you, you know. Only the way it is "triggered" is different. PLEASE don't tell us this is homework for some class. __________________ "Old age and cunning win out over youth and enthusiasm every time."

11-05-2009, 04:02 AM	PM User \| #7
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	need to have 2 text boxes ..one to enter the decimal..an the other displays the corresponding binary value and viser versa..

11-09-2009, 03:04 PM	PM User \| #9
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	how do you perform this coding with a for loop.. <html> <head> <title> Dice Stats </title> <script type="text/javascript" src="http://random.js"> </script> <script type="text/javascript"> function RollRepeatedly() // Assumes: repsBox contains a number // Results: simulates that many dice rolls, displays # of doubles { var doubleCount, totalRolls, repCount, roll1, roll2; doubleCount = 0; // INITIALIZE THE COUNTER totalRolls = document.getElementById("repsBox").value; totalRolls = parseFloat(totalRolls); repCount = 0; while (repCount < totalRolls) { // REPEATEDLY: roll1 = RandomInt(1, 6); // SIMULATE THE DICE ROLLS roll2 = RandomInt(1, 6); if (roll1 == roll2) { // IF DOUBLES, doubleCount = doubleCount + 1; // INCREMENT THE COUNTER } repCount = repCount + 1; // INCR. REPETITION COUNTER } document.getElementById("countBox").value = doubleCount; // display # } </script> </head> <body> <div style="text-align:center"> <h2>Dice Stats</h2> <p> Desired number of rolls = <input type="text" id="repsBox" size="6" value="1000" /> </p> <p> <input type="button" value="Click to Roll" onclick="RollRepeatedly();" /> </p> <p> Number of doubles obtained = <input type="text" id="countBox" size="6" value="0" /> </p> </div> </body> </html> Last edited by kasu; 11-09-2009 at 10:40 PM..

11-09-2009, 03:47 PM	PM User \| #10
jmrker Regular Coder Join Date: Aug 2006 Location: FL Posts: 655 Thanks: 1 Thanked 121 Times in 118 Posts	Beginning to look like a homework assignment ... See: http://www.webdeveloper.com/forum/sh...d.php?t=219590

11-19-2009, 04:02 AM	PM User \| #12
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	hi wondering a start to this ...just give me a idea plzz to create the following * * * *** * * * * * * * * * * * * * * * the above diagram is displayed incorrectly on the thread..plzz refer the page source of this page LINE 3105 COlUMN 3 to get the correct picture Last edited by kasu; 11-19-2009 at 04:23 AM..

11-19-2009, 07:09 AM	PM User \| #13
Old Pedant Senior Coder Join Date: Feb 2009 Location: Snohomish, WA Posts: 4,061 Thanks: 18 Thanked 660 Times in 652 Posts	LOL! So you and Dartz101 are in the same class: http://www.codingforums.com/showthread.php?t=182173 Tell me, which of you is getting the better grade? And, I also answered this last question from yet another student in your same class: http://www.codingforums.com/showthread.php?t=182091 He seems to be doing better than either you or Dartz101, no? Where the heck is this class, anyway?? __________________ "Old age and cunning win out over youth and enthusiasm every time."

11-19-2009, 09:38 AM	PM User \| #14
kasu New to the CF scene Join Date: Nov 2009 Location: SL Posts: 8 Thanks: 3 Thanked 0 Times in 0 Posts	i have no idea as to who is dartz101...and i checked the link uve posted but it does not have any relation to what my question is..and the second link aint workin..... I just wanted to create a diamond using asterix ....and i hope some one give me an idea to start off..i dont want any of u 2 do my homework..but hope a help from some one ..that will be great coz am a beginner..

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