This post is to deal with the puzzle on the namespace and external variables. Basically, namespace > external variable; external variables can included in namespace; and more than external variable, we can also have external class or struct. sometimes, it is very good to have global class or struct. example codes: #include <iostream>//also and must… Continue reading C++ Compile and Scope – 3 namespace and external variables and class

C++ 11 has four ways to store data. The differences between then is the amounts of time the data is being stored in memory.   Storage Continuousness Scope Linkage How to declare auto auto Code Block {} no in code block register auto Code Block {} no in code block;Keyword register static during program;allocate memory… Continue reading C++ Compile and Scope – 2

1. C++ Files  Header file (.hpp) often includes: function prototype inline function strut declaration class declaration template declaration #define & const Source file (.cpp) often includes: function definition related to what are included in the header file function definition  that call the above functions   Never use #include to include the source file because this… Continue reading C++ Complie and Scope – 1