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  1. %{ 
  2. #include <stdio.h> int vowels = 0, consonants = 0; 
  3. %} 
  4.  
  5. %% 
  6. [aeiouAEIOU]    { vowels++; } 
  7. [a-zA-Z]        { consonants++; } 
  8. .               { /* ignore */ } 
  9. %% 
  10.  
  11. int yywrap() { return 1; } 
  12.  
  13. int main() {   
  14. printf("Enter text (Ctrl+Z to end):\n");  
  15. yylex();     
  16. printf("Vowels: %d\nConsonants: %d\n", vowels, consonants); 
  17.     return 0; 
  18. } 
  19.  
Success #stdin #stdout #stderr 0.02s 6940KB
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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/gaUybJ/prog:2:1: Syntax error: Operator expected
ERROR: /home/gaUybJ/prog:18:2: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/aFfL4l
language:
Prolog (swi 7.6.4)
created:
10 hours ago
visibility:
public

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