trying to read all asci char's in files

Hi, I saw your encryption challenge and was a little intrigued by the option of being able to encrypt all asci files, and not just plain text, so I tried to do something similar with it myself. However, I ran into two significant problems. Firstly, what is the best way to take in the chars? I've tried this:

Code:

---

inFile>>letter;

---

and:

Code:

---

inFile.get(letter);

---

but neither will get all the asci char that seem to be in .exe files and the other non-readable files. The second problem is how do I know when the program has gone through the whole file? I can't do this:

Code:

---

while(!inFile.eof())
      {
      }

---

because there may be a eof char in the middle of the exe. Could anyone through in a bit of wisdom?

A quick search on Google turned up this: http://ei.cs.vt.edu/~cs2604/spring99/binio.html