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LEX Code to extract all html tags in the given HTML file at run time and store into Text file given

In this article, we are going to learn how to create LEX program to extract all HTML tag from HTML file?
Submitted by Ashish Varshney, on March 25, 2018

For achieve to this task we create some rules in rule section in the code.

%{
#include<stdio.h>
%}

%%
\<[^>]*\> fprintf(yyout,"%s\n",yytext);
.|\n; 
%%

int yywrap()
{
return 1;
}

int main()
{
yyin=fopen("input7.html","r");
yyout=fopen("output7.txt","w");
yylex();
return 0;
}

Input

Output