`ctrl'
------

ctrl("SWITCH",ONOFF)
     :: ݒ

RETURN
     0 ܂ 1
SWITCH
     XCb`
ONOFF
     tO (C)

   * Asir ̎s̐ݒύXs. tO 0 Ȃ΃XCb` SWITCH 
      off ɂ, ȊOȂ on ɂ.
   * XCb`͕Ƃē͂. Ȃ킿_uNH[gň͂.
   * XCb`͎̒ʂ.
     `cputime'
          on ̎ CPU time  GC time \, off ̎ \Ȃ. 
          `cputime()'Q. `ctrl("cputime",ONOFF)'  
          `cputime(ONOFF)' Ɠł.
     `nez'
          EZGCD ̃ASY̐ؑւ. ftHg 1 ł, Ƃ
          ؑւKv͂Ȃ.
     `echo'
          on ͕̎W͂JԂďo͂, off ͕̎W͂J
          ԂȂ.  `output' R}hpۂɗLł.
     `bigfloat'
          on ̎, ͂ꂽ bigfloat ɕϊ, 
          ZPARI (*Note pari::) ɂs. ftHg̗L
           9 ł. L𑝂₵ɂ `setprec()' p
          . off ̎, ͂ꂽ, {xɕϊ
          .
   * ꍇɂ 1 , sƂ pӂꂽXCb`ȊO
     ̂w肵ꍇɂ 0 Ԃ.

Q
     `cputime', `output', `pari', `setprec', `eval'

