Write a LEX program that reads a c program from input file and eliminates single line as well as multi-line comments from it and copies updates program to output file.

%{

#include<stdio.h>

%}

%%

\/\/.* {fprintf(yyout,"");}

\/\*(.*\n)*.*\*\/ {fprintf(yyout,"");}

. ; {fprintf(yyout,"%s",yytext);}

%%

main()

{

yyin=fopen("input.txt","r");

yyout=fopen("output.txt","w");

yylex();

}

int yywrap()

{

return 1;

}