C++ CString Hex to Integer Conversion

I have a CString.  I'm using Visual Studio C++ 6.0.  I need to extract a hex value from the string and convert it to an integer..

Here's an example:

CString cstr = "0xffff";

I need that cstr to then be an integer value so I can turn around and do something with the integer value (such as a computation.)
lcorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

AlexNekCommented:
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
BrianGEFF719Commented:
long l;
l = strtol((char *)cstr,NULL,16);
0
BrianGEFF719Commented:
for more information on strtol please see:
 http://www.thinkage.ca/english/gcos/expl/c/lib/strtol.html
0
Cloud Class® Course: Certified Penetration Testing

This CPTE Certified Penetration Testing Engineer course covers everything you need to know about becoming a Certified Penetration Testing Engineer. Career Path: Professional roles include Ethical Hackers, Security Consultants, System Administrators, and Chief Security Officers.

Deepu AbrahamR & D Engineering ManagerCommented:
Here is the code for you:
http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=1779
I hope this is what you need. Only thing is that you need to input the hex value as 'ffff' not 'Oxffff'
You could ommit this ox if it is there in the CString easily by using member functions find,left or right etc.
Best Regards,
DeepuAbrahamK




0
BrianGEFF719Commented:
long l;
CString cstr = "0xFFFF";
l = strtol((char *)cstr,NULL,0);
0
Deepu AbrahamR & D Engineering ManagerCommented:
Sorry, I thought I have provided the link of the sample:
Here we go: http://www.elecdesign.com/Articles/ArticleID/1779/1779.html
Hope this is what you want.
Best Regards,
DeepuAbrahamK
0
rstaveleyCommented:
Here's the IOStreams approach:

--------8<--------
#define WINVER 0x500
#include "afxwin.h"
#include <iostream>
#include <iomanip>
#include <sstream>

int main()
{
      long l;
      CString cstr = "0xFFFF";
      std::istringstream istr(static_cast<LPCTSTR>(cstr));
      istr >> std::hex >> std::showbase >> l;
      std::cout << l << " in hex is " << std::hex << std::showbase << l << '\n';
}
--------8<--------
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.