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  1. %{
  2. #include <stdio.h> %}
  3. %%
  4. [ \t\n]+; "/*"([^*]|\*+[^*/])*\*+"/"; "//".*;
  5. . {putchar(yytext[0]);} %%
  6. int main() {
  7. yylex();
  8. return 0; }in c
Success #stdin #stdout #stderr 0.02s 6900KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
ERROR: /home/NyRSMJ/prog:2:1: Syntax error: Operator expected
ERROR: /home/NyRSMJ/prog:8:14: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit