Adding on to Files

Is there a way to add on to a file with out storing everything in that file into variables?

Also does anyone know a really good tutorial that teaches GUI?


One thing does anyone know a good tutorial/example that teachs trees and nodes?

Thanks In advance for any help anyone can offer.

you could simply open the file with the append flag as follows:

//start source code

FILE* myFile = fopen("test.txt", "a");

//end source code


also, if the file is in text mode, then specify that this is text mode as follows:

// start source code

FILE * myFile = fopen("test.txt", "at");

// end source code

else the file is opened in binary mode.

hope that helps you with appending to files.

Na-iem

You could also use streams! For example:

#include <ofstream>
using std::ofstream;
using std::ios_base;

// create file output stream, which appends data at the end of the file

ofstream out("filename.txt", ios_base::app);

or

ofstream out;
out.open("filename.txt", ios_base::app);

// send data to file

out << "String to insert at the end of the file" << std::endl;

The file will be closed if the object goes out of scope of you call ofstream::close().

thank you.