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  1. %{
  2. #include <stdio.h>
  3. int vowels = 0, consonants = 0;
  4. %}
  5.  
  6. %%
  7.  
  8. [aeiouAEIOU] { vowels++; }
  9. [a-zA-Z] { consonants++; }
  10.  
  11. %%
  12.  
  13. int main() {
  14.     printf("Enter a string: ");
  15.     yylex();
  16.     printf("\nVowels: %d\nConsonants: %d\n", vowels, consonants);
  17.     return 0;
  18. }
  19.  
  20. int yywrap() {
  21.     return 1;
  22. }
Success #stdin #stdout #stderr 0.02s 6888KB
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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/QxmffX/prog:22:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/aHSbho
language:
Prolog (swi 7.6.4)
created:
6 days ago
visibility:
public

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