CPP namespace


using namespace std is bad practice in collision perspective
but just divide file and use intellisense



### Unnamed Namespaces
[Private Modifier](https://texonom.com/private-modifier-af1fcd4366374ba7a1441bf6d4d1e7e6) 
- Has namespace grouping, just no name
- Local Scope
```typenamespace {}```



> [Creating a C++ namespace in header and source (cpp)](https://stackoverflow.com/questions/8210935/creating-a-c-namespace-in-header-and-source-cpp)






