Solved

format double

Posted on 2006-06-27
3
263 Views
Last Modified: 2010-04-24
currently im converting a Standard::String to a double - this is the code im using

retArray[i] = System::Convert::ToDouble(strArray[i]);

as you can see, i have two arrays, one of doubles, the other of strings.

now it goes fine -  except for example i have a string value of "0.70", after the conversion the value in the double array is 0.699999999

shouldnt be that big of a deal, but im doing a number of iterations after that value is obtained, and i want it to be exact.

any idea how to get the value in after its passed to be 0.700000000????

thanks in advance

~b
0
Comment
Question by:bramsquad
3 Comments
 
LVL 30

Assisted Solution

by:Axter
Axter earned 62 total points
ID: 16997168
Hi bramsquad,
> any idea how to get the value in after its passed to be 0.700000000????
A double is not an exact number.
If you need higher precission, you need to use a different type.

Cheers!
0
 
LVL 8

Author Comment

by:bramsquad
ID: 16997352
thanks axter,

different type like what?

~b
0
 
LVL 15

Accepted Solution

by:
lakshman_ce earned 63 total points
ID: 16998026
Try to get the object's value using

Object* defaultValue== __box( Convert::ToDouble( strArray[i]) );

check value here

retArray[i] = *dynamic_cast<__box Double*>(obj);

Also you can use the IFormatProvider class to change the formatting.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The following diagram presents a diamond class hierarchy: As depicted, diamond inheritance denotes when two classes (e.g., CDerived1 and CDerived2), separately extending a common base class (e.g., CBase), are sub classed simultaneously by a fourt…
In Easy String Encryption Using CryptoAPI in C++ (http://www.experts-exchange.com/viewArticle.jsp?aid=1193) I described how to encrypt text and recommended that the encrypted text be stored as a series of hexadecimal digits -- because cyphertext may…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question