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  1. %{
  2. #include <stdio.h>
  3. int vowels = 0, consonants = 0;
  4. %}
  5.  
  6. [aAeEiIoOuU]+            {vowels++;}
  7.  
  8. [a-zA-Z]+                 {consonants++;}
  9.  
  10. %%
  11.  
  12. int main()
  13. {
  14.     printf("Enter a line: ");
  15.     yylex();
  16.     printf("\nStatistics:\n");
  17.     printf("Vowels: %d\n", vowels);
  18.     printf("Consonants: %d\n", consonants);
  19.     return 0;
  20. }
  21.  
Success #stdin #stdout #stderr 0.02s 6976KB
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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/slszCd/prog:20:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/7bY4vR
language:
Prolog (swi 7.6.4)
created:
2 days ago
visibility:
public

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