CS 102 Laboratory Session Two

Week Three Lab session. Perform the exercises in the lab session. You may prepare in advance if you like. Use only one preferred compiler (your choice). Show output to the TA for five points (maximum) credit for this session.

Exercise One

Two checkoff points.

Revise (extend, modify) your program from the first lab session to operate over the input range of minus one hundred million to five hundred million (use the American million with six zeroes). Test the program with an appropriate dataset.

Using a class

Thanks to Claire Bono for creating the exercises below. Used with permission.

Goals

These exercises will give you practice creating objects and calling member functions on objects. That is, acting as a "client" of a class. To complete this lab you should not change any of the code that is part of the class. That includes the class definition, the member functions definitions, and the other completed functions (except main). (Normally all the code for the class would appear in a separate file, but for now, we'll just use one file for our whole program.)

Exercise Two

Three checkoff points.

The source code for a fraction class can be found in ~csci102b/labs/lab2/fractlab.cc Make a copy of this file in your directory, but call it ex1.cc.

Record the error messages that result from compiling the following modifications to the program. To compile from inside emacs: (M-x compile; Ctrl-x ` to find errors); use the command g++ -g -Wall ex1.cc

For checkoff, show the TA a table (on-line or on paper) that lists the four error messages and their causes.


This page established September 8, 1999; last updated January 23, 2000 by Rick Wagner.