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  1. %{
  2.     int vow_count = 0;
  3.     int const_count = 0;
  4. %}
  5.  
  6. %%
  7. [aeiouAEIOU] { vow_count++; }
  8. [b-df-hj-np-tv-zB-DF-HJ-NP-TV-Z] { const_count++; }
  9. %%
  10.  
  11. int yywrap() {
  12.     return 1;
  13. }
  14.  
  15. int main() {
  16.     printf("Enter the string of vowels and consonants: ");
  17.  
  18.     yylex();
  19.  
  20.     printf("Number of vowels are: %d\n", vow_count);
  21.     printf("Number of consonants are: %d\n", const_count);
  22.  
  23.     return 0;
  24. }
  25.  
Success #stdin #stdout #stderr 0.03s 6996KB
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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/K8Lkpq/prog:24:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? EOF: exit
https://ideone.com/6pL59b
language:
Prolog (swi 7.6.4)
created:
12 days ago
visibility:
public

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