/*
 * SelfTest 
 * Chapter 12
 * By John Stile
 */
1. What are the statements for declaring a file pointer named fin_num,
   opening a file named xyz for reading, and assigning it's file pointer 
   to fin_num?

ANSWER:
  FILE * fin_num;
  fin_num=(fopen("xyz", "r");

2. What is the fprintf statement for writing "Hello World" to a 
   file which has the file pointer out_file?

ANSWER:
   fprintf( out_file, "%s",  "Hello World" );

3. How do the arguments of:
     getchar()
     gets()
     scanf()
     putchar()
     puts()
     printf()
   differ from their file equivalents:
   fgetc()
   fgets()
   fscanf()
   fputc()
   fputs()
   fprintf()

ANSWER:
  Each takes a file pointer rather than stdout

4. (6 in the book) Which mode-constant should b e used in the fopen() function
  to open a binary file for reading only?

ANSWER:  fp=fopen("file_name", "rb" );

5. (7 in the boot) Which statement writes the array of floats called employeeData
   to a file?  Assume file is referenced through the file ponter fp,
   and the array size is 40.

ANSWER: 
  fprintf( &employeeData[0], sizeof(float), 40, fp) 

6. (8 in the book) Which statement access the beginning of a binary file using random access?
    Assume the file is referenced through file pointer fp.

ANSWER:
 fp=fopen("myfile", "r+b" )
 
7. (9 in the book) Consider the line of code:
   if( !feof(wq) )
   fread(oops, sizeof(float), 3, wq);

7a. What is the name of the file pointer?

ANSWER:  wq
 Read from FILE pointer fp,
 start at address oops, 
 read in checks of sizeof(float), 3 times   

7b. Because there are 4 bytes in a floating point number, how many bytes would
    be read when 'fread' is successfully executed?

ANSWER: 4*3=12 bytes

8. (14 i the book) Why is it important to use feof with binary files?

ANSWER: Binary data may contain and EOF.