What is the difference between opening a file in IOS: Binary and IOs: Text? fstream reads/writes a file.

Summarize the online search content:

1. When a file is written in text mode, the newline (/N) is extended to/R/n. When the file is read, it is automatically converted back.

2. the binary method does not perform any expansion, which is consistent with the read/write content.

3. The default value is text.

 

Http://blog.csdn.net/wanfustudio/archive/2007/09/14/1785131.aspx

 

Appendix: two self-written functions for reading and writing files using fstream

# Include <fstream>

Using namespace STD;

 

Bool preprocess: readparsersltfile (tstring filename)

{

Tchar szfull [max_path] = {0 };

_ Tcscpy_s (szfull, max_path, m_szdatafiledir );

_ Tcscat (szfull, text ("//"));

_ Tcscat (szfull, filename. c_str ());

_ Tcscat (szfull, text ("_ r "));

 

Wifstream fin;

Fin. Open (szfull, IOS: Binary );

If (Fin. Bad ())

{

Return false;

}

Fin. imbue (STD: locale ("CHS "));

 

Tchar szsize [16] = {0 };

Fin. Getline (szsize, 16); // the size of the first behavior File

Int nsize = _ ttoi (szsize );

 

Tstring strtmp;

For (INT I = 0; I <nsize; I ++)

{

Getline (FIN, strtmp );

M_vsenparrslt.push_back (strtmp );

}

Fin. Close ();

 

Return true;

}

Void preprocess: writefiles (tstring filename, const vector <tstring> & vcontent)

{

Tchar szfull [max_path] = {0 };

_ Tcscpy_s (szfull, max_path, m_szdatafiledir );

_ Tcscat (szfull, text ("//"));

_ Tcscat (szfull, filename. c_str ());

 

Wofstream fout;

Fout. Open (szfull, IOS: Binary | ios_base: trunc );

// Fout. Clear ();

Fout. imbue (STD: locale ("CHS "));

Fout <vcontent. Size () <"/N ";

For (INT I = 0; I <vcontent. Size (); I ++)

{

Fout <vcontent [I]. c_str () <"/N ";

}

Fout. Close ();

}

The written content contains Chinese characters, so you must add: fout. imbue (STD: locale ("CHS "));

Tstring is a custom macro, representing string or wstring

# Ifdef _ Unicode

# Define tstring wstring

# Else

# Define tstring string

# Endif