`setprec'
---------

setprec([N])
     :: bigfloat $B$N7e?t$r(B N $B7e$K@_Dj$9$k(B.

RETURN
     $B@0?t(B

N
     $B@0?t(B

   * $B0z?t$,$"$k>l9g(B, bigfloat $B$N7e?t$r(B N $B7e$K@_Dj$9$k(B.
     $B0z?t$N$"$k$J$7$K$+$+$o$i$:(B, $B0JA0$K@_Dj$5$l$F$$$?CM$rJV$9(B.

   * bigfloat $B$N7W;;$O(B PARI (*Note pari::) $B$K$h$C$F9T$o$l$k(B.

   * bigfloat $B$G$N7W;;$KBP$7M-8z$G$"$k(B.  bigfloat $B$N(B flag $B$r(B on
     $B$K$9$kJ}K!$O(B, `ctrl' $B$r;2>H(B.

   * $B@_Dj$G$-$k7e?t$K>e8B$O$J$$$,(B, $B;XDj$7$?7e?t$K@_Dj$5$l$k$H$O(B
     $B8B$i$J$$(B. $BBg$-$a$NCM$r@_Dj$9$k$N$,0BA4$G$"$k(B.

     [1] setprec();
     9
     [2] setprec(100);
     9
     [3] setprec(100);
     96

$B;2>H(B
     *Note `ctrl': ctrl, *Note `eval deval': eval deval, *Note `pari':
     pari.

