%{
#include <stdio.h>
#include <stdlib.h>
FILE *outFile;
%}
 
%%
"<"[^>]+">" { 
            fprintf(outFile, "%s\n", yytext); 
            }
 
.|\n { /* Ignore all other content */ }
%%
 
int yywrap()
{
    return 1;
}
 
int main(int argc, char *argv[]) 
{
 
    if(argc < 3)
    {
        printf("Usage: %s input.txt output.txt\n", argv[0]);
        return 1;
    }
    FILE *inFile = fopen(argv[1], "r");
    if(!inFile)
    {
        printf("Cannot open input file\n");
        return 1;
    }
 
    outFile = fopen(argv[2], "w");
    if(!outFile)
    {
        printf("Cannot open output file\n");
        return 1;
    }
    yyin = inFile;
    yylex();
 
    fclose(inFile);
    fclose(outFile);
 
    printf("HTML tags extracted successfully!\n");
    return 0;
}
 

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