/in/foo.cc: In function 'int main()':
/in/foo.cc:23:3: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
  d*=100;
  ~^~~~~
/in/foo.cc:22:3: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  c*=100;
  ~^~~~~
/in/foo.cc:21:3: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  b*=100;
  ~^~~~~
/in/foo.cc:20:3: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
  a*=100;
  ~^~~~~