/* openfile.h
 * Header file for function to open a file to read from or to write to
 * Authors: Amit Nangalia  
 * Last modified: 15th February, 2000

 */

/* Purpose: open a file in the mode specified in the function call.
 * Post-conditions: File is opened (created for writing if didn't exist)
 *                  in appropriate mode.
 * Parameters: the mode in which to open the file - the mode can be a
 *             combination of three letter r(read), w(write) and a(append)
 */ 
FILE *filereader(char mode[4]);