/in/foo.cc: In function 'int main()':
/in/foo.cc:8:8: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int c,d;
        ^
/in/foo.cc:8:6: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int c,d;
      ^