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Assignment No. 03 (Graded)
Semester Fall 2013
Compiler Construction CS606
Total Marks: 20
Due Date: 29/01/2014
To learn and understand basic concepts of LR(1) Parser, LL parsing, Shift/ Reduce Conflicts
and Reduce/Reduce conflicts.
Lectures Covered: 23-30
Please read the following instructions carefully before submitting assignment:
You will submit your assignment before or on due date on VU-LMS.
Assignment should be completed by your own efforts it should not be copied from
internet, handouts or books.
You should submit your solution in Word File only via assignment interface at VULMS.
Assignment sent via Email will not be replied and accepted/graded in any case.
If the submitted assignment does not open or file is corrupt, it will not be graded.
For any query about the assignment, contact at cs606@vu.edu.pk
Question No 1: Marks 20
Consider the following grammar:
S → Sb
S → cS
S → a
(a) Identify all conflicting items, and the types of the conflicts. [10 marks]
(b) Rewrite the grammar in an equivalent form that is suitable for LL parsing and minimizes the
use of stack space. [5 marks]
(c) Rewrite the grammar in an equivalent form that is directly suitable for LR parsing (i.e., does
not result in conflicts) and minimizes the use of stack space. [5 marks]

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Replies to This Discussion

Please Discuss here about this assignment.Thanks

Our main purpose here discussion not just Solution

We are here with you hands in hands to facilitate your learning and do not appreciate the idea of copying or replicating solutions.

halooo friends plzzz share ur ideas about this assignment 

Question # 1 at Lecture # 28 at top !

Question # 2 at Lecture # 32 at top !

Question # 3 at Lecture # 32 at middle page !

Please ki to idea solution send karo yar

please anyone upload the solution

kisi ko kuch smj aye to discuss kre..itni tough assignment

Aslamo Alaikum 

Dear VU fellows....!

Please upload solution becasue I dont understand the assignment even a single question so please upload solution .

Plzzzzzzzzzzzzzzzzzzz    Plzzzzzzzzzzzzzzzzzzzzzzz          Plzzzzzzzzzzzzzzzzzz


student query about assignment

Dear Sir,, Kindly provide me some examples that how to Rewrite the grammar in an equivalent form that is suitable for LL parsing and LR parsing ?? lectures are not enough to solve the examples..

Instructor's Reply:

Dear Student,

Here are two examples to make you understand the concept.

Example 1:

E -> E '+' T
    -> T
Rewrite the grammar in an equivalent form

E -> T Z
Z -> '+' T
Z -> ε

Example 2:
Before Rewrite
 E -> E + T | T
T -> T * F | F
 F -> ( E ) | Id

After Rewrite

E -> T E`
E’ -> + TE` | 
T -> F T`
T’ -> * F T` | 
F -> ( E ) | id

Aslamo Alaikum

Dear VU Fellows..........!

Anyone for GOD sake help me to solve that assignment please I m much worried.........

Please           Please

          Please          Please

                    Please          Please

kahan chaly gy ho sub log help karny waly aj kahn hen
boht pershan hn assignment samj he nai aa rahi koi to guide kar dy

yar qasam say question he itnay aountry hay kay samjh he nahe a rahy ! 

and time b kam ha


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