// Minimal compiler test for C compiler.
//
// Semantic mistakes like these are common enough that any compiler MUST produce warnings
// like those in the comments if it is to be used for more than "hello, world".

int
main (void)
{
  int a, b, c, d;

  a = b << c + d;               // warning: suggest parentheses around + or - inside shift
  return 0;
}