Lexical Analyzer Assignment




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Lexical Analyzer Assignment
1. You will implement a lexical analyzer by converting to Java the lexical analyzer (which is written in C) given
in the supplied files: Assignment1.c, LexicalAnalyzer.h, and LexicalAnalyzer.c which you will download.
You can compile and execute this C code program.
2. It is reasonable to create a class called LexicalAnalyzer for this assignment’s lexical analyzer based on the C
code in LexicalAnalyzer.h and LexicalAnalyzer.c. You must declare private all the data members of the
LexicalAnalyzer class. You must declare private all the methods in the LexicalAnalyzer class, except for the
constructor and the method getToken. You can create any additional classes for your lexical analyzer, as
3. It is reasonable to create a class called Token for the getToken method of the LexicalAnalyzer class to return
a token which consists of two values: the token code, and the lexeme string. Therefore, the Token class has
two data members called tokenCode, and lexemeString. You must declare private all the data members of
the Token class. The only methods of the Token class are the constructor, and a getter and setter method for
each data member. The constructor has 2 parameters, one for each data member, since creating a Token object
means values are already available to assign to the Token’s data members.
4. Create a driver class and make the name of the driver class Assignment1 containing only one method:
public static void main(String args[]).
It is reasonable to base the code of the driver class on the C code in Assignment1.c. The main method receives,
via the command line arguments, the name of the file that the lexical analyzer processes.
I compile and run your program via the command line using the Java JDK. Therefore, the command I type
to execute your program is java Assignment1. I’ll test your program with my own example file.
For example, if the name of the example file is then the command to run the program is:
java Assignment1
5. You must declare public each class you create which means you define each class in its own file.
6. You must declare private all the data members in every class you create.
7. You do not need and cannot use extends in this assignment.
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8. Tip: Make your program as modular as possible, not placing all your code in one .java file. You can create
as many classes as you need in addition to the classes described above. Methods being reasonably small
follow the guidance that “A function does one thing and does it well.” You will lose a lot of points for code
readability if you don’t make your program as modular as possible. But, do not go overboard on creating
classes and methods. Your common sense guides your creation of classes and methods.
9. Do NOT use your own packages in your program. If you see the keyword package on the top line of any of
your .java files then you created a package. Create every .java file in the src folder of your Eclipse project, if
you’re using Eclipse.
10. Do NOT use any graphical user interface code in your program!
11. Do NOT type any comments in your program. If you do a good job of programming by following the advice
in number 8 above then it will be easy for me to determine the task of your code.
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Grading Criteria
The total assignment is worth 20 points, broken down as follows:
1. If your code does not implement the task described in this assignment then the grade for the assignment is
2. If your program does not compile successfully then the grade for the assignment is zero.
3. If your program produces runtime errors which prevents the grader from determining if your code works
properly then the grade for the assignment is zero.
If the program compiles successfully and executes without significant runtime errors then the grade computes as
Followed proper submission instructions, 4 points:
1. Was the file submitted a zip file.
2. The zip file has the correct filename.
3. The contents of the zip file are in the correct format.
4. The keyword package does not appear at the top of any of the .java files.
Program execution, 4 points:
• Program input, the program properly reads, processes, and uses the input.
• Program output, the program produces the correct results for the input.
Code implementation, 8 points:
• The driver file has the correct filename, and contains only the method main
performing the exact tasks as described in the assignment description.
• The code performs all the tasks as described in the assignment description.
• The code is free from logical errors.
Code readability, 4 points:
• Good variable, method, and class names.
• Variables, classes, and methods that have a single small purpose.
• Consistent indentation and formatting style.
• Reduction of the nesting level in code.
Late submission penalty: assignments submitted after the due date are subjected to a 2 point deduction for each
day late.
Late submission policy: you CAN submit your assignment early, before the due date. You are given plenty of
time to complete the assignment well before the due date. Therefore, I do NOT accept any reason for not counting
late points if you decide to wait until the due date (and the last possible moment) to submit your assignment and
something happens to cause you to submit your assignment late.
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Submission Instructions
Go to the folder containing the .java files of your assignment and select all (and ONLY) the .java files which you
created for the assignment in order to place them in a Zip file. The file can NOT be a 7z or rar file! Then, follow
the directions below for creating a zip file depending on the operating system running on the computer containing
your assignment’s .java files.
Creating a Zip file in Microsoft Windows (any version):
1. Right-click any of the selected .java files to display a pop-up menu.
2. Click on Send to.
3. Click on Compressed (zipped) Folder.
4. Rename your Zip file as described below.
5. Follow the directions below to submit your assignment.
Creating a Zip file in Mac OS X:
1. Click File on the menu bar.
2. Click on Compress ? Items where ? is the number of .java files you selected.
3. Mac OS X creates the file
4. Rename Archive as described below.
5. Follow the directions below to submit your assignment.
Save the Zip file with the filename having the following format:
your last name,
followed by an underscore _,
followed by your first name,
followed by an underscore _,
followed by the word Assignment1.
For example, if your name is John Doe then the filename would be: Doe_John_Assignment1
Once you submit your assignment you will not be able to resubmit it!
Make absolutely sure the assignment you want to submit is the assignment you want graded.
There will be NO exceptions to this rule!
You will submit your Zip file via your CUNY Blackboard account.
The only accepted submission method!
Follow these instructions:
Log onto your CUNY BlackBoard account.
Click on the CSCI 316 course link in the list of courses you’re taking this semester.
Click on Content in the green area on the left side of the webpage.
You will see the Assignment 1 – Lexical Analyzer Assignment.
Click on the assignment.
Upload your Zip file and then click the submit button to submit your assignment.
Due Date: Submit this assignment by Wednesday, April 29, 2020.