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  1. %{
  2. int vowels = 0, consonants = 0;
  3. %}
  4.  
  5. %%
  6. [aeiouAEIOU]    { vowels++; }
  7. [a-zA-Z]        { consonants++; }
  8. .|\n            { /* ignore other characters */ }
  9. %%
  10.  
  11. int main() {
  12.     yylex();
  13.     printf("Vowels: %d\n", vowels);
  14.     printf("Consonants: %d\n", consonants);
  15.     return 0;
  16. }
  17.  
  18. int yywrap() {
  19.     return 1;
  20. }
  21.  
Success #stdin #stdout #stderr 0.03s 6884KB
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Standard input is empty
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Standard output is empty
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ERROR: /home/y5oTtH/prog:20:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/mHKpoO
language:
Prolog (swi 7.6.4)
created:
2 days ago
visibility:
public

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