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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. [0-9]+ {
  7.     int num = atoi(yytext);
  8.     if (num % 2 == 0) {
  9.         printf("%d is even\n", num);
  10.     } else {
  11.         printf("%d is odd\n", num);
  12.     }
  13. }
  14. .|\n    ;
  15. %%
  16.  
  17. int main() {
  18.     yylex();
  19.     return 0;
  20. }
  21.  
  22.  
Success #stdin #stdout #stderr 0.04s 6956KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
ERROR: /home/LhWA0s/prog:21:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/y9rsis
language:
Prolog (swi 7.6.4)
created:
15 days ago
visibility:
public

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