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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. abc printf("ABC"); // Convert 'abc' to 'ABC'
  7. .|\n printf("%c", yytext[0]); // Print any other character as it is
  8. %%
  9.  
  10. int main() {
  11. yylex();
  12. return 0;
  13. }
  14.  
Success #stdin #stdout #stderr 0.03s 7012KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
ERROR: /home/9o4unx/prog:13:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit