::fread Binary data input function
fread is one of the most important C functions for binary input.
getc can also be used, but it only reads one byte at a time.
fread will read a data block of any size the computer can handle.
Always make sure you put 'b' in the mode parameter of fopen when
planning to use binary file input-output.
::fwrite Binary data output function
fwrite is one of the most important C functions for binary output.
putc can also be used, but it only writes one byte at a time.
fwrite will write a data block of any size the computer can handle.
Always make sure you put 'b' in the mode parameter of fopen when
planning to use binary file input-output.
::rndm C random access functions
C has two primary random access functions,
    fgetpos
and
    fsetpos
which may be used to find and alter the read/write position in a file.
Call fgetpos to find out where you are in a file, and later use fsetpos
to return to that same position.