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  1. %{
  2. #include <stdio.h>
  3. int com = 0;
  4. %}
  5.  
  6. %%
  7. "/*"[a-zA-Z0-9 \t\n]*"*/"   { com++; }      /* block comments */
  8. "//".*                      { com++; }      /* single-line comments */
  9. .|\n                        { /* ignore others */ }
  10. %%
  11.  
  12. int main() {
  13.     printf("Enter code press ctrl+d to end \n");
  14.     yylex();
  15.     printf("\ncomments are: %d", com);
  16.     return 0;
  17. }
  18.  
  19. int yywrap(void) {
  20.     return 1;
  21. }
Success #stdin #stdout #stderr 0.02s 6944KB
comments (?)
stdin
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/*rhjgd*/
//fghgf
stdout
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Standard output is empty
stderr
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ERROR: /home/ZHRPjG/prog:21:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? [Illegal port specification]
   Exception: (3) program ? EOF: exit
https://ideone.com/xzEyJi
language:
Prolog (swi 7.6.4)
created:
3 days ago
visibility:
public

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