Thread: Difference between reading a file in binary and ready only mode?

I just wanted to know what the difference between opening a file as "r" and "rb" is? I thought C stored all values as the ASCII value? So doesn't this mean that is I opened a file in read only mode and displayed the hex value it would be the same as if I opened a file in binary mode?
Any help would be appreciated
Thanks in advance.

I'm getting deja-vu here. This is pretty much the same question as this:

http://cboard.cprogramming.com/showthread.php?t=69912

The answers in that thread apply to reading as well as writing.

Thanks for that reply cwr
That is what I thought, so technically in unix there is no difference between text mode and binary mode? I mean no additions are made to the file like in the case of a windows machine it adds a carriage return before the new line.
If that is right what happens to the '\r' if I were to create a file on a windows system and then open that file in linux in text mode or will I have to deal with the '\r' in my code?
Thanks

so technically in unix there is no difference between text mode and binary mode?

Correct

If that is right what happens to the '\r' if I were to create a file on a windows system and then open that file in linux in text mode or will I have to deal with the '\r' in my code?

Im pretty sure that in this case Linux would keep the \r, and you would have to deal with it in your code. That is why a lot of times when you save a file on windows, then open it up in vi on linux, you see an unknown character at the end of every line.