Lecture 25 Objectives

At the end of today's class you should

KNOW:

That accumulator-style functions can be more efficient than the kinds of recursive functions we have written so far.
That accumulator-style programming is the style of programming used in many other programming languages.

BE ABLE TO:

Convert a Scheme program to a program that accomplishes the same task "accumulator-style".

Sample Exam Question:

In Homework 11, you are writing functions that model a Discussion Board. Write an accumulator-style function get-unread-messages that consumes a username, a course title and a forum title and produces a list of the messages in the named forum that the user with the given username has not yet read.