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  1.  
  2. %{ 
  3.     int count=0; 
  4. %} 
  5. %% 
  6.     /* match identifier */ 
  7. [A-Za-z]([A-Za-z]|[0-9])* {count++;}
  8. %% 
  9. int yywrap()
  10. {
  11. return 1;
  12. }
  13.  
  14. int main(void) { 
  15.     yylex(); 
  16.  
  17.     printf("number of identifiers = %d\n", count); 
  18.     return 0; 
  19. }
Success #stdin #stdout #stderr 0.02s 6988KB
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abc
stdout
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Standard output is empty
stderr
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ERROR: /home/PJ2WSU/prog:19:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/Rf2zAQ
language:
Prolog (swi 7.6.4)
created:
2 days ago
visibility:
public

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