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Date: Sun, 23 Sep 2001 12:13:15 -0400
From: Clint Adams <clint@zsh.org>
To: Zefram <zefram@fysh.org>
Cc: zsh-users@sunsite.dk
Subject: Re: forcing output type
Message-ID: <20010923121315.A16711@dman.com>
References: <20010923114054.A16301@dman.com> <20010923164705.A15106@fysh.org>
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In-Reply-To: <20010923164705.A15106@fysh.org>; from zefram@fysh.org on Sun, Sep 23, 2001 at 04:47:05PM +0100

> The expression "2/3" is a truncating integer division; its value is
> exactly 0.  Just as in C, if you want to do a floating-point division
> you have to provide floating-point operands.

Here's a hack that lets one do "calc 2/3" and get a floating point
answer.

calc () {
        setopt localoptions extendedglob
        local expr="$*"
        if [[ "$expr" != *.* && "$expr" = *(#b)([0-9]##)(#B)' '#/' '#([0-9]##)* ]]
        then
                expr="${expr/${match[1]}/${match[1]}.0}" 
        fi
        print $(( $expr ))
}