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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. . { printf("Hello World\n"); BEGIN(0); exit(0); }
  7. %%
  8.  
  9. int main() {
  10. yylex();
  11. return 0;
  12. }
Success #stdin #stdout #stderr 0.03s 6892KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
ERROR: /home/zsIpte/prog:2:1: Syntax error: Operator expected
ERROR: /home/zsIpte/prog:12:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit