C :: Encryption Code File Reading Error

Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int encrypt_data(FILE *);

[Code] ....

I am trying encrypt the file "encrypt" when I enter it I get "Error in reading file"

I think its a problem with the fgets() and scanf()...I tried both fgets out and then scanf but I get the same error.

I look in the directory and see that when I enter a file to be encrypted a blank file with a "?" at the end is created in the directory. so I try to encrypt "encrypt" it shows error then creates "encrypt?"

I then tested it by entering a random file name that does not exist

EXAMPLE

Please enter file to be encrypted: fakefilename

Error in reading file.

I look in the directory the non existent file now is listed "fakefilename"