`output'
--------

output(["FILENAME"])
     :: ʹߤν FILENAMEޤɸϤؤ.

RETURN
     1
FILENAME
     ե̾

   * Asir νϤɸϤ, եؤνϤؤ. ʤ, ե
     Ϥδ֤, ɸϤˤϥܡɤϰʳ, Ϥ
     .
   * ̤ΥեϤؤˤ, Ƥ `output("FILENAME")' 
     Ԥ. , եϤλɸϤꤿˤ, 
      `output()' ¹Ԥ.
   * ꤷե FILENAME ¸ߤ, Υե
     񤭤, ¸ߤʤäˤ, ˥ե, ˽
     ޤ.
   * ե͡ "" ֥륯Ȥʤǻ򤷤, 桼, 
     񤭹ʤեꤷꤹ, 顼ˤȥåץ٥
     .
   * ϤΤƥե˽Ϥˤ,
     `ctrl("echo",1)' ¹ԤǥեϤؤɤ.
   * ׻֤ʤ, ɸ२顼Ϥ˽񤭽ФΤϥեˤϽ
     Фʤ.
   * ȡ, ̤그 (`vtype()' ) ޤޤʤΥեؤ
     ɤ߽񤭤, `bload()', `bsave()' ȤΤ, , ֤Ȥ˸Ψ
     褤.

     [83] output("afo");
     fctr(x^2-y^2);
     print("afo");
     output();
     1
     [87] quit;
     % cat afo
     1
     [84] [[1,1],[x+y,1],[x-y,1]]
     [85] afo
     0
     [86]


     `ctrl', `bload', `bsave'

