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  1. %{
  2. #include<stdio.h>
  3. %}
  4.  
  5. %%
  6. "<"[^>]*> { printf("%s ", yytext); }
  7. .         ;
  8. %%
  9.  
  10. int yywrap() { 
  11.     return 1;
  12. }
  13.  
  14. int main() {
  15.     extern FILE *yyin;
  16.     yyin = fopen("basic.txt", "r"); 
  17.     yylex();
  18.     fclose(yyin); // Don't forget to close the file after reading
  19.     return 0;
  20. }
  21. flex HTMLtags.c
  22. gcc lex.yy.c
  23. ./a.exe
Success #stdin #stdout #stderr 0.03s 6872KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/F2zui2/prog:2:1: Syntax error: Operator expected
ERROR: /home/F2zui2/prog:7:11: Syntax error: End of file in quoted atom
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/iRhmFT
language:
Prolog (swi 7.6.4)
created:
18 days ago
visibility:
public

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