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  1. %{
  2. #include <stdio.h>
  3. int vowels = 0, consonants = 0, digits = 0;
  4. %}
  5.  
  6. %%
  7. [aeiouAEIOU] { vowels++; }
  8. [a-zA-Z] { consonants++; }
  9. [0-9] { digits++; }
  10. %%
  11.  
  12. int main() {
  13.     printf("Enter a string: ");
  14.     yylex();
  15.     printf("Vowels: %d\nConsonants: %d\nDigits: %d\n", vowels, consonants, digits);
  16.     return 0;
  17. }
  18.  
  19. int yywrap() {
  20.     return 1;
  21. }
Success #stdin #stdout #stderr 0.03s 6908KB
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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/tQ4c1I/prog:21:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/yDev7u
language:
Prolog (swi 7.6.4)
created:
10 days ago
visibility:
public

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