the hot air balloon is the oldest successful human carrying flight technology the first hot air balloon flown in the united states was launched from the walnut street jail in philadelphia on january 9 1793 by the french aeronaut jean pierre blanchardhe first hot air balloon flown in the united states was launched from the walnut street jail in philadelphia on january 9 1793 by the french aeronaut jean pierre blanchard
shared_ptr is now part of the C++11 Standard, as std::shared_ptr. Starting with Boost release 1.53, shared_ptr can be used to hold a pointer to a dynamically allocated array. This is accomplished by using an array type (T[] or T[N]) as the template parameter.
(Push-To-Talk) PTT is a two-way communication service that works like a walkie talkie. A normal cell phone call is full-duplex, meaning both parties can hear each other at the same time. PTT is half-duplex, meaning communication can only travel in one direction at any given moment; only one person can be heard at a time. To control which person can speak and be heard, PTT requires the person speaking to push a button while talking and then release it when they are done (hence the term Push To Talk.)