exponential to non-exponential value

private void decrypt_Click(object sender, EventArgs e)
      {
          v = Convert.ToDouble (txtencrypt.Text);
           t= Math.Pow(v, d);
           MessageBox.Show(Convert.ToString(t));
           MessageBox.Show(""+t.ToString());
           MessageBox.Show("" + Convert.ToDecimal(n));
           msg = Convert.ToInt16(Math.Pow(v,d) % Convert.ToDouble(n));
           txtdecrypt.Text = Convert.ToString(msg);
      }

/*
this is the code im working now for rsa decryption. the problem im getting is the pow function
return in exponential format, but i need the non exponential format of output.
can any one please help me to find out solution? */

Here's a simple way in which you can suppress the display of doubles using exponential format:

using System;

class Test

{

static void Main()

{

double d = Math.Pow(10, 308);

Console.WriteLine(d);

string s = ToNonExpFormat(d);

Console.WriteLine(s);

Console.WriteLine(s.Length);

Console.ReadKey();

}

static string ToNonExpFormat(double d)

{

return d.ToString("F99").TrimEnd('0').TrimEnd('.');

}

}

The output is:

1E+308

10000000000000000000000000000000000000000000000000000000000000000000000000000000

00000000000000000000000000000000000000000000000000000000000000000000000000000000

000000000000000000000000000000000000000000000000000000000000000000000

309

However, please note the following:

1. This doesn't improve accuracy which is still limited to 15 or 16 significant digits.

2. Very small numbers with exponents less than -99 will be shown as 0. For example:

double d = Math.Pow(10, -99);

output:

1E-99

0.000000000000000000000000000000000000000000000000000000000000000000000000000000

000000000000000000001

101

But:

double d = Math.Pow(10, -100);

output:

1E-100

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Here's a simple way in which you can suppress the display of doubles using exponential format:

using System;

class Test
{
static void Main()
{
double d = Math.Pow(10, 308);
Console.WriteLine(d);
string s = ToNonExpFormat(d);
Console.WriteLine(s);
Console.WriteLine(s.Length);
Console.ReadKey();
}

static string ToNonExpFormat(double d)
{
return d.ToString("F99").TrimEnd('0').TrimEnd('.');
}
}

The output is:

1E+308
10000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000000000000000000000
309

However, please note the following:

1. This doesn't improve accuracy which is still limited to 15 or 16 significant digits.

2. Very small numbers with exponents less than -99 will be shown as 0. For example:

double d = Math.Pow(10, -99);

output:

1E-99
0.000000000000000000000000000000000000000000000000000000000000000000000000000000
000000000000000000001
101

But:

double d = Math.Pow(10, -100);

output:

1E-100
0
1