Because all the time 9 is added to 2 yielding 11. Jos > -----Original Message----- > From: users-boun...@racket-lang.org > [mailto:users-boun...@racket-lang.org] On Behalf Of Keiko Nakata > Sent: 02 August 2010 14:55 > To: mfl...@cs.utah.edu > Cc: users@racket-lang.org > Subject: Re: [racket] begin vs + > > Actually, I didn't see. > > Why this code > > (let ([d (box #f)] [a (box 0)]) > (print (+ (begin (let/cc k (begin (set-box! d k) (set-box! > a 2) 3))) (unbox a))) > ((unbox d) 9)) > > prints 511111111, rather than 59999999? > > Keiko > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users
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