ramachandransec / ex-5-recognition-of-a-valid-arithmetic-expression-that-uses-operator---and-using-yacc

Ex-5-RECOGNITION-OF-A-VALID-ARITHMETIC-EXPRESSION-THAT-USES-OPERATOR-AND-USING-YACC

Date:

AIM

To write a yacc program to recognize a valid arithmetic expression that uses operator +,- ,* and /.

ALGORITHM

1. Start the program.
2. Write a program in the vi editor and save it with .l extension.
3. In the lex program, write the translation rules for the operators =,+,-,*,/ and for the identifier.
4. Write a program in the vi editor and save it with .y extension.
5. Compile the lex program with lex compiler to produce output file as lex.yy.c. eg $ lex filename.l
6. Compile the yacc program with yacc compiler to produce output file as y.tab.c. eg $ yacc –d arith_id.y
7. Compile these with the C compiler as gcc lex.yy.c y.tab.c
8. Enter an arithmetic expression as input and the tokens are identified as output.

PROGRAM

OUTPUT

RESULT

A YACC program to recognize a valid arithmetic expression that uses operator +,-,* and / is executed successfully and the output is verified.