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  1. %{
  2. #include <stdio.h>
  3. int vowels = 0, consonants = 0;
  4. %}
  5. %%
  6. [aeiouAEIOU] { vowels++; }
  7. [a-zA-Z] { consonants++; }
  8. .|\n ;
  9. %%
  10. int main() {
  11.     yylex();
  12.     printf("Vowels: %d\nConsonants: %d\n", vowels, consonants);
  13.     return 0;
  14. }
  15.  
Success #stdin #stdout #stderr 0.03s 6912KB
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stdin
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hello
stdout
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Standard output is empty
stderr
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ERROR: /home/EGe6VV/prog:14:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/aQjoWF
language:
Prolog (swi 7.6.4)
created:
15 hours ago
visibility:
public

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