ANSWERS: Quiz 1, CS 257

1. You have a file bar.stk in your home directory that you'd like to load into scheme (which is already running inside your Emacs). What do you type?

   
   
   C-c C-l ~/foo.stk
   
   or
   
   (load "~/foo.stk")      in *scheme* buffer
   
   
   
   

2. Sue the high school hacker gets paid $150 for installing Linux on her dad's company's web server, and invests it all in stock in a startup that goes up 17% before she sells. She then earns $72 for helping recover a file from a disk that crashed without any backups. At this point she invests all her money in Microsoft, just in time for the Great Crash of 1997 in which she loses 54% of her investment.

   Write a Scheme expression that calculates how much money Sue ends up with.

   
   
   
   
   (* (- 1 0.54)
      (+ 72
         (* (+ 1 0.17)
            150)))