Write a LEX program to check the syntax of for loop.

Code:

%{

#include<stdio.h>

#include<ctype.h>

int c=1;

%}

op "++"|"--"

rop "<"|">"|"<="|">="|"=="|"!="

id [a-zA-Z][a-zA-Z0-9]*

no [0-9]*

pp [\n]

%%

for\(({id}=({no}|{id}))?\;{id}{rop}({id}|{no})\;{id}{op}\){pp}+\{(.*\n)*.*\}

{printf("correct");c=0;}

%%

main()

{

yyin=fopen("file11.c","r");

yylex();

if(c==1)

printf("incorrect");

}

int yywrap()

{

return 1;

}