如何在txt文件中更改EOL编码？

Question

I am writing in Visual Studio 2008 in C++ and I have problems with other libraries - they do not accept the line endings (EOL) I generate with my txt files.

How can I change that while writing a file with

std::ofstream myFile;
myFile.open("traindata.txt");
myFile << "stuff" << endl;
// or 
//myFile << "stuff" << '\n';
myFile.close();

EDIT 2 :

Ok, I did a mistake in code : I was appending "0 " for every iteration so that I had whitespace before the EOL.

By bad. You guys have been right. Thanks for help.

Answer 1

Is it possible that you just don't want the \\n to end of line sequence to happen? Open your file using std::ios_base::binary : this turns off precisely the conversion. ... and don't use std::endl unless you really want to flush the stream:

std::ofstream myFile("traindata.txt", std::ios_base::binary);
myFile << "stuff\n";

The close() is typically also unnecessary unless you want to check that it was successful.

Answer 2

You should open the file stream in binary mode to keep C++ library from converting line endings automatically:

myFile.open("traindata.txt", std::ios_base::out|std::ios_base::binary);

That will keep C++ library from converting '\\n' to OS-specific EOL symbol (CR-LF on Windows).

Answer 3

Download notepad++ - that should be able to fix the problem.

Or dos2unix , unix2dos on cygwin

Answer 4

对于Windows样式的结尾，请使用myfile << "\\r\\n" ，对于UNIX样式，请使用myfile << "\\n" 。