CS 100

Introduction to Computer Science

Lab 3

Introduction to PERL

Due: April 10/11 at midnight

Part I: Edit a given PERL program with notepad and run it on Windows

Part II: Write your own program in PERL

Part I:

(1). Edit the following code with notepad and save it to file example1.pl.

To run the program on windows, you need to navigate your computer to

locate your file then double click the file.

#!c:/Perl/bin/perl

print "Hello Perl!\n\n";

print "This is my first program in PERL!\n\n";

# the follow two lines are used to keep the output of the program stays.

print "\n\n Press ENTER To Exit !\n";

$tmpvar = <STDIN>;

(2). Edit the following code with notepad and save it to file example2.pl.

Run the program.

#!c:/Perl/bin/perl

#this program takes three numbers and output the sum of the numbers.

print "Please enter the first number: \n”;

$number1 = <STDIN>;

print "Please enter the second number: \n”;

$number2 = <STDIN>;

print "Please enter the third number: \n”;

$number3 = <STDIN>;

$sum = $number1 + $number2 + $number3;

printf (“The sum of three numbers %f, %f, and %f is %f \n\n”, $number1, $number2, $number3,$sum);

# the follow two lines are used to keep the output of the program stays.

print "\n\n Press ENTER To Exit !\n";

$tmpvar = <STDIN>;

Part II

Task 1: Write a program to display the following graphs on the screen.

(1)

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(2)

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Task 2: Write a program to take 4 numbers and output the product of them.

How to submit your programs?

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

Make sure you codes work correctly before you submit them. (Do not submit the example codes.)

Grading:

Program for task 1	25 points
Program for task 2	25 points