Q92803: Writing CR/LF Combination Using CFile::Write() Function

Article: Q92803
Product(s): Microsoft C Compiler
Version(s): winnt:1.0,2.0,2.1,4.0,4.1,7.0
Operating System(s): 
Keyword(s): kbFileIO kbMFC kbVC100 kbVC150 kbVC152 kbGrpDSMFCATL
Last Modified: 07-MAY-2001

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 4.0, 4.1, 7.0 
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52 
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SUMMARY
=======

In an application developed with the Microsoft Foundation Classes (MFC) that
uses the CFile class, the Write() member function may appear not to correctly
process the carriage return-linefeed (CR/LF) combination unless both the
carriage return and linefeed are explicitly stated.

For example, the following code

     CFile file;
     // ...
     file.Write("Hello\n", 6);
     file.Write("Hello\n", 6);

produces the following output:

-------------------
Hello
    Hello
-------------------

However, the following code

     file.Write("Hello\n\r", 7);
     file.Write("Hello\n\r", 7);

produces the following output:

-------------------
Hello
Hello
-------------------

MORE INFORMATION
================

When an application uses the CStdioFile class derived from CFile, an application
can open a file in either text mode or binary mode. Using a CStdioFile object is
the preferred method to place a CR/LF combination into a file. However, if the
application must use a CFile object, a CR/LF combination may be explicitly
output as demonstrated above.

Additional query words: kbinf 7.00 1.00 1.50 2.00 2.10 2.50 2.51 2.52 3.00 3.10 4.00 4.10

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Keywords          : kbFileIO kbMFC kbVC100 kbVC150 kbVC152 kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:1.0,2.0,2.1,4.0,4.1,7.0
Issue type        : kbinfo

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