Using a stream to enter text at the end of a file

Question

How can I use a stream to write text to the end of a file without deleting its contents inside?

Answer 1

When opening a file, you can pass the flag ios::app:

ofstream ofs("filename", ios::app);

Answer 2

You want to add a file. Use ios :: app as the file mode when creating the stream.

Adding will automatically search for the end of the file.

Answer 3

ios:: app .

Answer 4

seekp() .

Answer 5

, :

ofstream out("path_to_file",ios::app);

, .

, , ios::app, :

out.seekp(0,ios::end) This will place a pointer to 0 bytes from the end of the file. http://www.cplusplus.com/reference/ostream/ostream/seekp

Make sure you use the correct seekp (), as there are 2 seekp () overloads. In this situation, two parameters are preferred.