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formatted output with cout

 
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Mastupristi
Guest
PostPosted: Thu Feb 24, 2005 8:04 am    Post subject: formatted output with cout Reply with quote


I want to obtain the c++ equivalent of:

unsigned short us = 347;
printf("0x%04hX",us);

that outputs "0x015B"

I ried with:

cout.setf(ios_base::hex,ios_base::basefield);
cout.setf(ios_base::showbase);
cout.width(6);
cout.fill('0');
cout << 347 << endl;

But I obtain "00x15b"
Then I tried to modify:

cout.setf(ios_base::hex,ios_base::basefield);
cout << "0x";
cout.width(4);
cout.fill('0');
cout << 347 << endl;

and obtain "0x015b", but I want uppercase characters.

How can I obtain what I want in a simple way using cout?



thanks

--
Mastupristi?
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Dietmar Kuehl
Guest
PostPosted: Thu Feb 24, 2005 9:15 am    Post subject: Re: formatted output with cout Reply with quote


Mastupristi wrote:
Quote:
and obtain "0x015b", but I want uppercase characters.

I thought that

std::cout << std::hex << std::showbase << std::uppercase
<< std::internal << std::setw(Cool << std::sefill('0')
<< 0x015b << "n";

should do the trick but at least on the machine I'm at it does
not. On another machine it does, however.
--
<http://www.contendix.com> - Software Development & Consulting


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Mastupristi
Guest
PostPosted: Thu Feb 24, 2005 10:26 am    Post subject: Re: formatted output with cout Reply with quote


On 24 Feb 2005 01:15:20 -0800
"Dietmar Kuehl" <dietmar_kuehl (AT) yahoo (DOT) com> wrote:

Quote:
std::cout << std::hex << std::showbase << std::uppercase
std::internal << std::setw(Cool << std::setfill('0')
0x015b << "n";
ok, now I obtain "0X015B" instead of "0x015B".

How can be improved this print?

thanks

--
Mastupristi?

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John Carson
Guest
PostPosted: Thu Feb 24, 2005 10:26 am    Post subject: Re: formatted output with cout Reply with quote
"Mastupristi" <cialdi_NO_SP (AT) AM_gmail (DOT) com> wrote

Quote:
I want to obtain the c++ equivalent of:

unsigned short us = 347;
printf("0x%04hX",us);

that outputs "0x015B"

I ried with:

cout.setf(ios_base::hex,ios_base::basefield);
cout.setf(ios_base::showbase);
cout.width(6);
cout.fill('0');
cout << 347 << endl;

But I obtain "00x15b"
Then I tried to modify:

cout.setf(ios_base::hex,ios_base::basefield);
cout << "0x";
cout.width(4);
cout.fill('0');
cout << 347 << endl;

and obtain "0x015b", but I want uppercase characters.

How can I obtain what I want in a simple way using cout?



thanks

--
Mastupristi?

Streams are a mystery to me, but the following seems to work:

cout.setf(ios_base::hex, ios_base::basefield);
cout.setf(ios::uppercase);
cout << "0x";
cout.width(4);
cout.fill('0');
cout << 347 << endl;


--
John Carson

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Ivan Vecerina
Guest
PostPosted: Thu Feb 24, 2005 12:21 pm    Post subject: Re: formatted output with cout Reply with quote
"Mastupristi" <cialdi_NO_SP (AT) AM_gmail (DOT) com> wrote

Quote:
On 24 Feb 2005 01:15:20 -0800
"Dietmar Kuehl" <dietmar_kuehl (AT) yahoo (DOT) com> wrote:

std::cout << std::hex << std::showbase << std::uppercase
std::internal << std::setw(Cool << std::setfill('0')
0x015b << "n";
ok, now I obtain "0X015B" instead of "0x015B".
How can be improved this print?

I guess you could try:
std::cout << "0x" << std::hex << std::uppercase
<< std::internal << std::setw(Cool << std::setfill('0')
<< 0x015b << "n";

Now if you ask me, I wouldn't bother wrestling with the
standard C++ streams formatting. I'd go for boost::format
or some other kind of wrapper around the C library calls...

--
http://ivan.vecerina.com/contact/?subject=NG_POST <- email contact form



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Samuel Krempp
Guest
PostPosted: Fri Mar 25, 2005 11:13 am    Post subject: Re: formatted output with cout Reply with quote
le Thursday 24 February 2005 13:21,
[email]NOT_VALID_please_use_contact_webform (AT) vecerina (DOT) com[/email] écrivit :

Quote:
"Mastupristi" <cialdi_NO_SP (AT) AM_gmail (DOT) com> wrote in message
news:20050224112636.000010aa.cialdi_NO_SP (AT) AM_gmail (DOT) com...
On 24 Feb 2005 01:15:20 -0800
"Dietmar Kuehl" <dietmar_kuehl (AT) yahoo (DOT) com> wrote:

std::cout << std::hex << std::showbase << std::uppercase
std::internal << std::setw(Cool << std::setfill('0')
0x015b << "n";
ok, now I obtain "0X015B" instead of "0x015B".
How can be improved this print?

I guess you could try:
std::cout << "0x" << std::hex << std::uppercase
std::internal << std::setw(Cool << std::setfill('0')
0x015b << "n";

Now if you ask me, I wouldn't bother wrestling with the
standard C++ streams formatting. I'd go for boost::format
or some other kind of wrapper around the C library calls...

boost::format is not a wrapper around C lib calls, it's a wrapper around
stream calls.. so it'll actually do the same thing as the above lines.
(but it would be possible to overload boost::format for basic types and
forward those to a suitable function of the printf family. It might help
performance.. and ease compatibility with printf for basic types Smile I
should try that when I have some time.)

--
Samuel.Krempp
cout << "@" << "crans." << (is_spam ? "trucs.en.trop." : "" )
<< "ens-cachan.fr" << endl;


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