[plt-scheme] Help: Uber newb

From: John Clements (clements at brinckerhoff.org)
Date: Tue Jan 8 22:23:36 EST 2008

On Jan 8, 2008, at 7:08 PM, William Stanley wrote:

> Exercise 2.2.4.   Define the program convert3. It consumes three  
> digits, starting with the least significant digit, followed by the  
> next most significant one, and so on. The program produces the  
> corresponding number. For example, the expected value of
> (convert3 1 2 3)
> is 321. Use an algebra book to find out how such a conversion works.
> Okay I had gone past this exercise but as I couldn't figure it out  
> it was bugging me... and I must say its been a while since I  
> regularly used algebra but after racking my brain for a while and  
> googling for even longer I throw myself at your mercy... I am sure  
> it is rather simple but I am stumped... sometimes I wish I could  
> peek at those answers... even just to see if I got it right.
> Travis Stanley

I hate to be the design-recipe-bot, but... have you tried following  
the design recipe?  What are the examples you came up with?  Are  
there simple examples that you know how to do?

John Clements

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