http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49679
--- Comment #4 from Jonathan Wakely 2011-07-08
18:37:41 UTC ---
(In reply to comment #3)
> a and b must be the same.
No, it's undefined behaviour. Anything can happen.
http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49679
--- Comment #3 from Jordan 2011-07-08 18:32:55
UTC ---
I know the warnings, but look the code
a+=++a+a++;
b+=++b+b++;
cout << "a=" << a << endl << "b=" << b << endl;
cin >> a;
a and b must be the same.
if i re
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49679
Jonathan Wakely changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49679
--- Comment #1 from Andrew Pinski 2011-07-08
17:55:35 UTC ---
You are invoking undefined behavior because C++ does not specify what order of
the operands happen first.
