/in/foo.c: In function 'main':
/in/foo.c:17:15: error: stray '\' in program
    printf("%u"\n", n);
               ^
/in/foo.c:17:16: error: expected ')' before 'n'
    printf("%u"\n", n);
                ^
/in/foo.c:17:17: warning: missing terminating " character
    printf("%u"\n", n);
                 ^
/in/foo.c:17:17: error: missing terminating " character
    printf("%u"\n", n);
                 ^~~~~~
/in/foo.c:17:13: warning: format '%u' expects a matching 'unsigned int' argument [-Wformat=]
    printf("%u"\n", n);
             ^
/in/foo.c:19:3: error: expected ';' before '}' token
   }
   ^