`strtov'
--------

strtov(STR)
     :: STR (ʸ) 긵Ѥ.

RETURN
     긵
STR
     긵ȤѴǽʸ

   * 긵ȤѴǽʸ긵Ѥ.
   * 긵ȤѴǽʸȤ, ѾʸǻϤޤ, ѻ, 
     ӵ `_' ǺʸǤ.
   * `rtostr()' ȹ礻, ץǼưŪ긵
     Ѥ.

     [0] A="afo";
     afo
     [1] for (I=0;I<3;I++) {B=strtov(A+rtostr(I)); print([B,type(B)]);}
     [afo0,2]
     [afo1,2]
     [afo2,2]


     `rtostr', `type', `uc'

