Proc bash pouziva cela cisla pri deleni?

[pavel hampl]

Zdenek Svarc wrote:
> 
> Kdyz necham "let promena=1/2", vrati se mi hodnota promene 0, ale ja spravne chci 0,5. Pritom bash umi pracovat i s desetinym cisly. Kde je problem, jak prinutit bash, aby mi vracel presny vysledek? Dik za stupidni odpoved na stupidni otazku :-)
> 
>        Zd
> 

Vypis z "man bash":

ARITHMETIC EVALUATION
       The shell allows arithmetic expressions to be
evaluated, under certain
       circumstances  (see  the  let builtin  command  and 
Arithmetic  
       Expansion).  Evaluation is done in long integers with
no check for
                                       ^^^^^^^^^^^^^^^^^^
       overflow, though division by 0 is trapped and flagged
as an error.


PHampl
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