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# double to binary in c#

Posted on 2009-05-17
Medium Priority
1,901 Views
how can i convert the double value of 1E+27 (or bigger) to binary?

Thanks.
0
Question by:OrenRozen
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LVL 5

Expert Comment

ID: 24405614
I think you can find more about this here http://www.csharpfriends.com/Forums/ShowPost.aspx?PostID=54741
0

LVL 3

Author Comment

ID: 24405862
Thanks for your answer, but it does not solve my problem.

to convert I use the following:
int intValue = Convert.ToInt32(DoubleBinVal, 2);   //DoubleBinVal = the value to convert to binary.

My problem is that 'DoubleBinVal' is out of the range of the int32.
any way to solve that?

Thanks.
0

LVL 11

Expert Comment

ID: 24406122
try using this

Convert.ToString(i, 2)
0

LVL 64

Expert Comment

ID: 24406214
What are you attempting to accomplish? Are you trying to print the value in binary format?
0

LVL 3

Author Comment

ID: 24406742
I want to print out the result in int of any combination of processor affinity selection, for example: when selecting cores 1 to 3 the result is 15.
the problem is when selecting cores of high values, for example: 1 and 20.
the number is too big to calculate.
0

LVL 9

Expert Comment

ID: 24407764
I'm not really sure what exactly the purpsoe of this is, but if int is too small, you can try System.Int64. This gives a larger range of numbers.

Also, if you know your answer cannot be negative, use unsigned integer value types (i.e. System.UInt64, System.UInt32, etc.)

Why are you doing this, by the way? Floating-point numbers are stored in a VERY different format than integers. For example, the number 5 in floating-point binary format looks absolutely nothing like the number 5 in integer format.

Hope I helped,
Nate
0

LVL 3

Author Comment

ID: 24409079
Hi,

The attached code is a sample of what I'm trying to do.

The problem begins when selecting from checkbox20 and above (with or without combination of any other checkboxes).

Hope that clears my issue.

Thanks.
``````using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

ulong p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12,p13,p14,p15,p16 = 0;
ulong p17,p18,p19,p20,p21,p22,p23,p24,p25,p26,p27,p28,p29,p30,p31,p32 = 0;

private void button1_Click(object sender, EventArgs e)
{
if (checkBox1.Checked == true) p1 = ulong.Parse(Convert.ToString(1, 2));
if (checkBox2.Checked == true) p2 = ulong.Parse(Convert.ToString(2, 2));
if (checkBox4.Checked == true) p3 = ulong.Parse(Convert.ToString(4, 2));
if (checkBox3.Checked == true) p4 = ulong.Parse(Convert.ToString(8, 2));
if (checkBox5.Checked == true) p5 = ulong.Parse(Convert.ToString(16, 2));
if (checkBox6.Checked == true) p6 = ulong.Parse(Convert.ToString(32, 2));
if (checkBox7.Checked == true) p7 = ulong.Parse(Convert.ToString(64, 2));
if (checkBox8.Checked == true) p8 = ulong.Parse(Convert.ToString(128, 2));
if (checkBox9.Checked == true) p9 = ulong.Parse(Convert.ToString(256, 2));
if (checkBox10.Checked == true) p10 = ulong.Parse(Convert.ToString(1024, 2));
if (checkBox11.Checked == true) p11 = ulong.Parse(Convert.ToString(2048, 2));
if (checkBox12.Checked == true) p12 = ulong.Parse(Convert.ToString(4096, 2));
if (checkBox13.Checked == true) p13 = ulong.Parse(Convert.ToString(8192, 2));
if (checkBox14.Checked == true) p14 = ulong.Parse(Convert.ToString(16384, 2));
if (checkBox15.Checked == true) p15 = ulong.Parse(Convert.ToString(32768, 2));
if (checkBox16.Checked == true) p16 = ulong.Parse(Convert.ToString(65536, 2));
if (checkBox17.Checked == true) p17 = ulong.Parse(Convert.ToString(131072, 2));
if (checkBox18.Checked == true) p18 = ulong.Parse(Convert.ToString(262144, 2));
if (checkBox19.Checked == true) p19 = ulong.Parse(Convert.ToString(524288, 2));
if (checkBox20.Checked == true) p20 = ulong.Parse(Convert.ToString(1048576, 2));
if (checkBox21.Checked == true) p21 = ulong.Parse(Convert.ToString(2097152, 2));
if (checkBox22.Checked == true) p22 = ulong.Parse(Convert.ToString(4194304, 2));
if (checkBox23.Checked == true) p23 = ulong.Parse(Convert.ToString(8388608, 2));
if (checkBox24.Checked == true) p24 = ulong.Parse(Convert.ToString(16777216, 2));
if (checkBox25.Checked == true) p25 = ulong.Parse(Convert.ToString(33554432, 2));
if (checkBox26.Checked == true) p26 = ulong.Parse(Convert.ToString(67108864, 2));
if (checkBox27.Checked == true) p27 = ulong.Parse(Convert.ToString(134217728, 2));
if (checkBox28.Checked == true) p28 = ulong.Parse(Convert.ToString(268435456, 2));
if (checkBox29.Checked == true) p29 = ulong.Parse(Convert.ToString(536870912, 2));
if (checkBox30.Checked == true) p30 = ulong.Parse(Convert.ToString(1073741824, 2));
if (checkBox31.Checked == true) p31 = ulong.Parse(Convert.ToString(2147483648, 2));
if (checkBox32.Checked == true) p32 = ulong.Parse(Convert.ToString(4294967296, 2));

string NewBinVal = (p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8 + p9 +
p10 + p11 + p12 + p13 + p14 + p15 + p16 + p17 + p18 + p19 +
p20 + p21 + p22 + p23 + p24 + p25 + p26 + p27 + p28 + p29 + p30 + p31 + p32).ToString();

int intValue = Convert.ToInt32(NewBinVal, 2);

textBox2.Text = intValue.ToString();
p1 = 0;
p2 = 0;
p3 = 0;
p4 = 0;
p5 = 0;
p6 = 0;
p7 = 0;
p8 = 0;
p9 = 0;
p10 = 0;
p11 = 0;
p12 = 0;
p13 = 0;
p14 = 0;
p15 = 0;
p16 = 0;
p17 = 0;
p18 = 0;
p19 = 0;
p20 = 0;
p21 = 0;
p22 = 0;
p23 = 0;
p24 = 0;
p25 = 0;
p26 = 0;
p27 = 0;
p28 = 0;
p29 = 0;
p30 = 0;
p31 = 0;
p32 = 0;

}

private void Form1_Load(object sender, EventArgs e)
{

}
}
}
``````
0

LVL 9

Expert Comment

ID: 24412484
Heh... Have you heard of arrays OrenRozen?
0

LVL 3

Author Comment

ID: 24412596
can you show me a small example of how arrays can solve my problem?
0

LVL 9

Expert Comment

ID: 24413856
Well it won't solve your problem, but it'll at least fix up your, uh, "code"...
``````using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private UInt64[] numbers = new UInt64[32];
// Load ALL of your CheckBoxes into the following array
private CheckBox[] cbxs = new CheckBox[32];

private void button1_Click(object sender, EventArgs e)
{
Int32 count = 0;
foreach (CheckBox cbx in cbxs)
{
if (cbx.Checked)
{
numbers[count] = UInt64.Parse(Convert.ToString((UInt64)Math.Pow(2.0, count), 2));
}
count++;
}

StringBuilder bldr = new StringBuilder();
foreach (UInt64 num in numbers)
{ bldr.Append(num); }
textBox2.Text = bldr.ToString();

for (Int32 i = 0; i < numbers.Length; i++)
{ numbers[i] = 0; }
}
}
}
``````
0

LVL 3

Author Comment

ID: 24419500
it sure is an elegant written code and I'll use it.
at list now I know how to use arrays with checkboxes, textboxes...

But, as you wrote, it wont solve my problem. Still looking.

Thanks.
0

LVL 9

Expert Comment

ID: 24432424
I'm still very confused as to what it is you're trying to accomplish here. Do you need to work with numbers that are too large for UInt64? If you need numbers that are larger than the max of double, I don't know that I can help you. I'll show you Double's max value:

179,769,313,486,232,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

That's System.Double's max value(System.Double.MaxValue) formatted to a numeric format. I really doubt that it is not adequate for your needs.
0

LVL 64

Accepted Solution

Fernando Soto earned 2000 total points
ID: 24433865
Hi OrenRozen;

I believe that the code snippet below will do what you want. In one of your post you have the following lines. Note that when you go from the 9th bit position to the 10th bit position it should go from 256 to 512 and not 256 to 1024.

if (checkBox9.Checked == true) p9 = ulong.Parse(Convert.ToString(256, 2));
if (checkBox10.Checked == true) p10 = ulong.Parse(Convert.ToString(1024, 2));

Fernando
``````private void button1_Click(object sender, EventArgs e)
{
string NewBinVal = "";

for (int idx = 32; idx > 0; idx--)
{
Control[] ctl = this.Controls.Find("checkBox" + idx.ToString(), true);
CheckBox cb = ctl[0] as CheckBox;
if (cb.Checked)
NewBinVal += "1";
else
NewBinVal += "0";
}

Int64 intValue = Convert.ToInt64(NewBinVal, 2);

textBox2.Text = intValue.ToString();

}
``````
0

LVL 3

Author Closing Comment

ID: 31582333
simple, elegant and easy.
Appreciate all your efforts.

Regards.
0

LVL 64

Expert Comment

ID: 24434666
Not a problem, glad I was able to help.  ;=)
0

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