fork download
copy 
  1. %{
  2. #include <stdio.h>
  3. #include <string.h>
  4. %}
  5.  
  6. %%
  7. [a-zA-Z_][a-zA-Z0-9_]* {
  8.     printf("Valid identifier: %s\n", yytext);
  9. }
  10.  
  11. .|\n {
  12.     printf("Invalid identifier: %s\n", yytext);
  13. }
  14.  
  15. %%
  16.  
  17. int main() {
  18.     yylex();
  19.     return 0;
  20. }
  21.  
  22. int yywrap(){
  23.  
  24. return 1;
  25.  
  26. }
Success #stdin #stdout #stderr 0.02s 6944KB
comments (?)
stdin
copy 
hello
stdout
copy 
Standard output is empty
stderr
copy 
ERROR: /home/4FGuf0/prog:26:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/RKfPNc
language:
Prolog (swi 7.6.4)
created:
16 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!