Thread: Output file has extra characters.

I am writing a program that encrypts a text file and then reopens the encrypted text and deciphers it and prints to another text file. Problem is at the end it gives me these two characters: ÿõ. I was thinking it had to do with not closing the file, I even commented out the .close parts and the characters still showed up, so I think its related.

Code:

// left out the open output and input files and the initial encrypting file process part.
 if (outfile.is_open()&& myfile.is_open())
  {      
    while (!myfile.eof())
    {               
             alpha =myfile.get();             
              enk =int(alpha) -10;              
              outfile<< char(enk) ;
                                             
    }      
        outfile.close();
        myfile.close();
   }     
  else
         cout << "Unable to open file";

I have a file that gets opened as char and converted into int + 10 for encryption, then that encrypted file gets opened and converted back to int -10 as shown above.
For example the input file will read "its cheasy" and the out put will say "its cheasyÿõ"

So I think that maybe niether time I close the files are actually closing them? I just don't see why as the format looks accurate. Thanks for any insight.

If I use that the output file stops at whitespace? so my sentence gets hose and the deciphered file changes from "want some cheese" to "lis eÿ"

I had tried a couple different input methods, EOF transmits everything excepting that extra 2 characters.

By encrypted i mean converting the char to an int and adding 10 to it. The code I posted has the decrypting code.
right now I convert it to int to add 10 and then convert back to char prior to cout to file.
BTW thanks for your input.