/in/foo.cc:11:1: warning: multi-line comment [-Wcomment]
   11 | //                                                     | \__ \
      | ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:119:27: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
  119 |         double_bird_chirp(c);
      |                           ^
      |                           |
      |                           int
/in/foo.cc:111:37: note: in definition of macro 'double_bird_chirp'
  111 | #define double_bird_chirp(a) printf(a)
      |                                     ^
In file included from /usr/include/c++/12/cstdio:42,
                 from /in/foo.cc:36:
/usr/include/stdio.h:356:43: note:   initializing argument 1 of 'int printf(const char*, ...)'
  356 | extern int printf (const char *__restrict __format, ...);
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~