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  1. % { 
  2. #include <stdio.h> 
  3. % } 
  4.  
  5. % % 
  6. [a - z A - Z _][a - z A - Z 0 - 9 _] * {printf("Valid Identifier");}
  7. ^[^a - z A - Z _] printf("Invalid Identifier"); 
  8. .; 
  9. % % 
  10.  
  11. int main() 
  12. { 
  13. yylex(); 
  14. return 0;
  15. } 
  16. int yywrap()
  17. {
  18. return 1;
  19. }
Success #stdin #stdout #stderr 0.02s 6988KB
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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/YTjEb3/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/3D4Uey
language:
Prolog (swi 7.6.4)
created:
9 days ago
visibility:
public

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