Binary Search - Opening a file for both reading and writing
=============

One of the TAs mentioned that some people are confused 
about opening a file for reading and writing simultaneously.

To open a file for both input and output in C++,
you can use the following as "mode":

ios::in|ios::out

The result is the bitwise-or of the modes
indicating input and output. This sets both
flags (input and output).

Example of usage:

fstream iofile;

iofile.open("myfile.txt", ios::in|ios::out);


Lucia Moura