CS 100

Introduction to Computer Science

Lab 6

PERL: loops & subroutines

Due: May 8 / 9 at midnight

This lab is optional. You can do it for extra credit.

Task 1: Write a program that takes an integer, N from the keyboard, and prints out a two dimensional N-by-N checkerboard pattern with alternating spaces and asterisks, like the following 4-by-4 pattern.

* * * *
 * * * *
* * * *
 * * * *

Task 2: Write a program that takes two integers, M and N from the keyboard, and prints out a two dimensional N-by-N checkerboard pattern and a two dimensional M-by-M checkerboard pattern.

How to submit your programs?

Please email your programs for the tasks to Jasper Lin by the due date. His email address is jlin@mtholyoke.edu.

Make sure you codes work correctly before you submit them.

Grading:

Task 1	10 points
Task 2 (proper use of subroutines is required)	10 points