std::swap

Defined in header `<algorithm>` Defined in header `<utility>`		(until C++11) (since C++11)
template< class T > void swap( T& a, T& b );	(1)
template< class T2, std::size_t N > void swap( T2 (&a)[N], T2 (&b)[N]);	(2)	(since C++11)

Exchanges the given valu