One tiny(!?) extension that comes with C++14 is binary literals. You can now write them by prefixing the binary number with 0b. This is a well known syntax from other languages and in fact has been around a while even as a gcc extension. So you might not even recognize this as new feature.
Anyway, it looks like this:
int b1 = 0b10; int b2 = 0B1010; // Capital B is OK too!
It goes well with digit separators too. You can write:
int b3 = 0b1010'1010; int b4 = 0B010'101'010;