/in/foo.cc: In function 'int main()':
/in/foo.cc:8:12: error: too few arguments to function 'int printf(const char*, ...)'
     printf();
            ^
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:364:12: note: declared here
 extern int printf (const char *__restrict __format, ...);
            ^~~~~~