信号槽库sigc++库的demo，使用sigc++2.8.0库版本，详细讲解了库的用法-demo signal slot library sigc++ library, use the library version sigc++2.8.0, explain in detail the usage of the library

信号槽库sigslot库的demo，使用sigslot1.0.0库版本，详细讲解了库的用法，只需要包含一个头文件就可以使用-demo signal slot library sigslot library, use the library version sigslot1.0.0, explain in detail the use of the library, just include a header file, you can use