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(18) C++14 smart pointer and reference counter*
(19) C++14 pthread*
(20) C++14 synchronized locker--mutex*
(21) C++14 if
(24) C++ time and sleep*
(25) C++ High Precision Computation*
(27) C++14 std::string*
(31) Advanced Level C++ Tech*
if(a>b){
std::cout<<"a is "<b";
}