1.1.1.3 cf

Here is the online help:

     $ ./cf -h
     usage: ./cf [ -eNxapPhv ]
       [ --verbose ]  (type=INTEGER, range=0...3, default=0)
              verbosity in range 0..3
       [ -e ] [ --epsilon ]  (type=STRING, default=1e-5)
              epsilon
       [ -N ] [ --max_denom ]  (type=STRING, default=10)
              largest denominator allowed
       [ -x ] [ --number ]  (type=STRING, default=0.0)
              input number x
       [ -a ] [ --print_a ]  (type=FLAG,)
              print sequence [a_0; ... ; a_n ]
       [ -p ] [ --mpfr_precision ]  (type=INTEGER, range=1..., default=53)
              precision of gmp mpfr_class (in bits)
       [ -P ] [ --out_precision ]  (type=INTEGER, range=0..., default=12)
              precision of output (in digits)
       [ -h ] [ --help ]  (type=FLAG)
              Display help information.
       [ -v ] [ --version ]  (type=FLAG)
              Output version.