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!

Mar 22 '07 #1

Pete Becker

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)

Mar 22 '07 #2

Jess

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!

Mar 22 '07 #3

jk

On 22 Mar 2007 04:59:06 -0700, "Jess" <wd***@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),,,,

Mar 22 '07 #4