lect1.zip: code developed during lectures 1 and 2.

lect3.zip: code developed during lecture 3.

Re homework 1 the grader says: "I think some of the students are having problems from the beginning. Also some students needs to read the questions more carfully."

lect5.zip: code developed during lecture 5.

lect-tree.zip: code developed during the lectures on trees, chap. 10 of the textbook.

prog5.zip: sketch of program 5 developed during the lecture of March 14.