help with setw and width functions!

[Jess]

Hello,

I'm trying to use setw and width functions to set the padding spaces
between numbers. The aim is to create two white spaces between two
double e.g. "1.1 1.2". I did:

streamsize s = cout.width(); // get the default width

cout << 1.1 << setw(2) << 1.2 << setw(s) << endl;

However, I didn't get any space at all, the output was simply
"1.11.2". Have I done something wrong?

Moreover, I had:

using std::width

but the compiler complained it and I had to remove "std". I thought
"width" is in std, is it not?

Thanks!

[Pete Becker]

Re: help with setw and width functions!

Jess wrote:

Hello,
>
I'm trying to use setw and width functions to set the padding spaces
between numbers. The aim is to create two white spaces between two
double e.g. "1.1 1.2". I did:
>
streamsize s = cout.width(); // get the default width
>
cout << 1.1 << setw(2) << 1.2 << setw(s) << endl;
>
However, I didn't get any space at all, the output was simply
"1.11.2". Have I done something wrong?
>
Moreover, I had:
>
using std::width
>
but the compiler complained it and I had to remove "std". I thought
"width" is in std, is it not?
>
Thanks!
>

If you want two spaces, put in two spaces:

cout << 1.1 << " " << 1.2 << '\n';

setw sets the minimum width for the next insertion. Since the 1.2
requires three characters, there is no padding needed to get it to at
least two characters.

--

-- Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com)
Author of "The Standard C++ Library Extensions: a Tutorial and
Reference." (www.petebecker.com/tr1book)

[Jess]

Re: help with setw and width functions!

So setw doesn't set the width of the gap between the current and next
input? I thought it meant the gap's distance. Thanks for letting me
know!

[jk]

Re: help with setw and width functions!

On 22 Mar 2007 04:59:06 -0700, "Jess" <wdfcj@hotmail. comwrote:

>So setw doesn't set the width of the gap between the current and next
>input? I thought it meant the gap's distance. Thanks for letting me
>know!

try setw(5),,,,