How to write LONGLONG data in a File

I want to write LONGLONG data (which is 64 bit integer) in a file. How can I do so?
asger_cseAsked:
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.

asger_cseAuthor Commented:
Give a sample code also.
0
martynjpearsonCommented:
There are loads of ways - if you want to write to the file as binary (i.e. not a text file) you can do this :

__int64 i64MyInt = 1234;
CFile fileOut("C:\\MyFile.bin", CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite);
fileOut.Write((void *)&i64MyInt, sizeof(__int64));
fileOut.Close();

This can then be read in a similar way, passing the address of the __int64 as the buffer, and sizeof(__int64) as the buffer size.

If you want to write it to a text file, you can do this :

__int64 i64MyInt = 1234;

CString strLine;
strLine.Format("%I64d", i64MyInt);

CStdioFile fileOut("C:\\MyFile.txt", CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite);
fileOut.WriteString(strLine + "\n");
fileOut.Close();


Hope this helps
Martyn
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
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
System Programming

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.