一些有用的链接，有空需要整理一下
Proper way to initialize C++ structs
https://stackoverflow.com/questions/5914422/proper-way-to-initialize-c-structs
Should I use std::function or a function pointer in C++?
https://stackoverflow.com/questions/25848690/should-i-use-stdfunction-or-a-function-pointer-in-c
C++ Memory Management
https://isocpp.org/wiki/faq/freestore-mgmt#delete-this
Eclipse - How to add a new MariaDB connection
https://stackoverflow.com/questions/36557936/eclipse-how-to-add-a-new-mariadb-connection
