[plt-scheme] Combining digits to form numbers

I should have added the following:

Are you using DrScheme? In that case you can check the correct placement of parentheses by placing the cursor right before or after a subform and inspect whether the highlighted part is as expected. You can also set the preferences such that when typing a closing parenthesesis, the corresponding opening parenthesis is shown for a short moment. I use these two tools very frequently. And of course I frequently use Check Syntax.

Jos
  ----- Original Message ----- 
  From: Jos Koot 
  To: aditya shukla 
  Cc: PLT Scheme ML ; plt-edu-discuss at list.cs.brown.edu 
  Sent: Tuesday, February 17, 2009 11:20 PM
  Subject: Re: [plt-scheme] Combining digits to form numbers


  You still have some parentheses wrong. See my anseer in private mail.
  Jos
    ----- Original Message ----- 
    From: aditya shukla 
    To: Jos Koot 
    Cc: PLT Scheme ML ; plt-edu-discuss at list.cs.brown.edu 
    Sent: Tuesday, February 17, 2009 10:47 PM
    Subject: Re: [plt-scheme] Combining digits to form numbers



    I removed the bugs from the cond condition .

    (define check-guess3 (lambda(lsb csb msb target)
                           (cond
                             [(< (guess lsb csb msb) target) 'Toosmall]
                             [(= (guess lsb csb msb) target) 'Perfect]
                             [else 'Toolarge])))
    (define guess (lambda (lsb csb msb)
                    (+(* msb 100)(* csb 10) (* lsb 1))))


    For removing the function call twice with the same argument i can i call it before cond and store the return value in a variable .can it be done like this

    (define check-guess3 (lambda(lsb csb msb target)
                             define guess-n (guess lsb csb msb)
                              (cond
                               [(< guess-n target) 'Toosmall]
                               [(= guess-n target) 'Perfect]
                               [else 'Toolarge])))
    (define guess (lambda (lsb csb msb)
                    (+(* msb 100)(* csb 10) (* lsb 1))))


    After doing this i get the error

    lambda: expected only one expression for the function body, but found at least one extra part

    How can i fix this error?


    Aditya

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