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System Software & Operating Systems Laboratory

Subject Code: 10CSL58 I.A. Marks : 25

Hours/Week : 03

Exam Hours: 03

Total Hours : 42

Exam Marks: 50

PART - A

LEX and YACC Programs:

LEX and YACC Programs:

Design, develop, and execute the following programs using LEX:

1. a) Program to count the number of characters, words, spaces and lines in a given input file. b) Program to count the numbers of comment lines in a given C program. Also eliminate them and copy the resulting program into separate file.

2. a) Program to recognize a valid arithmetic expression and to recognize the identifiers and operators present. Print them separately.
b) Program to recognize whether a given sentence is simple or compound.

3. Program to recognize and count the number of identifiers in a given input file.
Design, develop, and execute the following programs using YACC:

4. a) Program to recognize a valid arithmetic expression that uses operators +, -, * and /.
b) Program to recognize a valid variable, which starts with a letter, followed by any number of letters or digits.

5. a) Program to evaluate an arithmetic expression involving operators +, -, * and /.

b) Program to recognize strings aaab, abbb ab and a using the grammar (anbn, n>= 0).

6. Program to recognize the grammar (anb, n>= 10).

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Contact Details :
0831 249 8196

Address :

Visvesvaraya Technological University
Jnana Sangama, VTU Main Road,
Machhe, Belagavi, Karnataka 590018

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