Task Description

Your task is to implement a parser using table$-$driven parsing, using $C$ programming language, called

"parser.c$",$ that works correctly with "scanner.c$".$

When executing your programs, it can take a calculator language program $($with comments$)$ and find if it

has lexical errors and syntax errors or not.

Please compile both programs by typing

gcc parser.c scanner.c $-$o parser

To run the program, the user will type at command line:

$./$parser prog$1$

$,$ where prog$1$ is the name of the calculator program to be checked input by the user.

Next, your program should output error messages indicating any lexical or syntax error in the

calculator program; otherwise, output a $"$No lexical and syntax error." message.

For example, below calculator program below, called "prog$1",$ is both lexically and syntactically

correct:

$/*$ prog$1*\frac{*}{?}$

read a

read b

area :$=a**b$

perimeter :$=2***(a+b)$

write area

write perimeter