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Mail Archives: djgpp/2002/04/23/09:30:03

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From: "Alex Vinokur" <alexvn AT bigfoot DOT com>
Newsgroups: comp.lang.c++,comp.os.msdos.djgpp
Subject: Re: setw & notation
Date: Tue, 23 Apr 2002 16:31:13 +0200
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"Martin Ambuhl" <mambuhl AT earthlink DOT net> wrote in message news:3CC55D84 DOT 5FA93D1 AT earthlink DOT net...
| Alex Vinokur wrote:
|
| >           5e-05  || MY COMMENT : Why not 0.00005 ?
| >           6e-06  || MY COMMENT : Why not 0.000006 ?
|
| If you want fixed point, say so. Change
|         cout << setw(show_size_i) << value_i << endl;
| to
|         cout << fixed << setw(show_size_i) << value_i << endl;
|
[snip]

I don't want fixed point.
I want the output to be as following :
            0.1
           0.02
          0.003
         0.0004
        0.00005
       0.000006


Using 'fixed' causes a new problem.
(P.S. I don't want to define value's maximal size beforehand.)

###### Source C-file : BEGIN ######
// File t2.cpp

#include <iostream>
#include <iomanip>
using namespace std;

// -----------------------
template <typename T1>
void show_it (
 unsigned int show_size_i,
 const T1& value_i
 )
{
  cout.setf (ios::right, ios::adjustfield);
  cout << fixed << setw (show_size_i) << value_i << endl;
}


// -----------------------
int main ()
{
#define SHOW_SIZE_CNS 15

  show_it (SHOW_SIZE_CNS, 0.1);
  show_it (SHOW_SIZE_CNS, 0.02);
  show_it (SHOW_SIZE_CNS, 0.003);
  show_it (SHOW_SIZE_CNS, 0.0004);
  show_it (SHOW_SIZE_CNS, 0.00005);
  show_it (SHOW_SIZE_CNS, 0.000006);
  show_it (SHOW_SIZE_CNS, 0.0000007);
  show_it (SHOW_SIZE_CNS, 0.00000008);

  return 0;
}

###### Source C-file : END ########



###### Compilation & Run : BEGIN ######

%gpp  t2.cpp

%a.exe

       0.100000
       0.020000
       0.003000
       0.000400
       0.000050
       0.000006
       0.000001  || Shows invalid value
       0.000000  || Shows invalid value

###### Compilation & Run : END ########


====================
  Alex Vinokur
    http://up.to/alexvn
    http://go.to/alexv_math
    mailto:alexvn AT bigfoot DOT com
    mailto:alexvn AT go DOT to
  ====================





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