deleteTwoTimes.cpp:5:13: warning: defaulted function definitions are a C++11 extension [-Wc++11-extensions]
CTest( ) = default;
^
1 warning generated.
deleteTwoTimes.cpp:5:13: warning: defaulted function definitions are a C++11 extension [-Wc++11-extensions] CTest( ) = default; ^ 1 warning generated.
原文：https://www.cnblogs.com/fenyuxingzhe/p/14768938.html
