Question about CString Format

KellyR

Hi, so here's my problem: Basically I want to format a CString such that the trailing zeroes are all eliminated. For example, let's say I have a double such as: 610.15100000 And I want to print this to a CString so that I can set the text in an edit control. Right now I do something like this: CString strTemp; double fVal = 610.151; strTemp.Format(TEXT("%lf%), fVal); But in the edit control, it shows up with all the zeroes at the end: 610.15100000000 How do I make it print so that it shaves off the extra zeroes at the end? Thanks!

KR

David Crow

KellyR wrote:

How do I make it print so that it shaves off the extra zeroes at the end?

Assuming you want three places after the decimal, use:

strTemp.Format(TEXT("%.3f"), fVal);

If, however, you are wanting to remove all trailing zeros regardless of how many, see the TrimRight() method.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

modified on Friday, April 18, 2008 11:58 AM

CPallini

You may use strTmp.TrimRight(_T("0")); to the purpose. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

CPallini · modified on Friday, April 18, 2008 11:58 AM

The above will fail on fVal = 1.051000 (provided I understood his requirements). [added] Actually it fails also on his input (610.15100000). [/added] :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

David Crow

CPallini wrote:

The above will fail on fVal = 1.051000

How so? strTemp has a value of 1.

CPallini wrote:

Actually it fails also on his input (610.15100000).

It worked fine for me. strTemp has a value of 610.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

KellyR

strTmp.TrimRight(_T("0")); works as long as I have numbers after the decimal, but if I don't, it leaves me with whole numbers that end with a decimal, i.e: 610.00000 would become: 610. However, strTmp.TrimRight(_T(".0")); seems to work! Thank you much!

KR

KellyR

DavidCrow wrote:

It worked fine for me. strTemp has a value of 610.

But it needs to be 610.151. Thanks though!

KR

David Crow

So use .3 instead of .0 then. :rolleyes:

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

CPallini

I think he wants to remove trailing zeroes in a general way, i.e. that his input was just an example. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

David Crow

CPallini wrote:

I think he wants to remove trailing zeroes...

Yeah, I read it wrong. I thought he wanted to remove everything after the decimal. Sorry for the confusion.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne