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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. /* Flex options: read line by line interactively */
  6. %option noyywrap
  7.  
  8. %%
  9. ^[ \t]*$        { /* ignore blank lines */ }
  10. ^a+b+$          { printf("ACCEPTED\n"); }
  11. ^[ab]+$         { printf("REJECTED\n"); }
  12. .*/?             { printf("REJECTED\n"); }
  13. %%
  14.  
  15. int main(void) {
  16.     yylex(); /* Type strings; press Ctrl+D (Linux/macOS) or Ctrl+Z+Enter (Windows) to end */
  17.     return 0;
  18. }
Success #stdin #stdout #stderr 0.02s 6928KB
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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/VCH1zH/prog:18:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/GPKSSI
language:
Prolog (swi 7.6.4)
created:
4 days ago
visibility:
public

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