Write a Lex program to count the number of comment lines in a given C program.

Count the number of comment lines in a given C program using Lex

EXAMPLE :-

%{ int com=0; %} %% "/*"[^\n]+"*/" {com++;fprintf(yyout, " ");} %% int yywrap(void){} int main() { printf("Write a C program find Comment line : \n"); yyout=fopen("Output", "w"); yylex(); printf("Comment=%d\n",com); return 0; }

OUTPUT

sunny@sunny-PC:~/Desktop$ flex comment.l sunny@sunny-PC:~/Desktop$ gcc lex.yy.c sunny@sunny-PC:~/Desktop$ ./a.out

Write a C program find Comment line :

/* Write Hello World in C*/ #include <stdio.h> /* Main function starts from here*/ int main() { /* This statement will print Hello World message */ printf(“Hello World!”); return 0; }

            Ctrl+d

Comment=3