Advanced C++ Topics

Nested Classes and Name Spaces

Name spaces are also used to avoid naming conflicts.
By using name spaces, it becomes possible to use classes or functions with the same name in the same program.
```
std::map /* standard library template map */
acme::map /* another class called map */
```
To add classes, functions, or variables to a name space, surround their declarations with a namespace block.
```
namespace acme
{
   class map
   {
      ...
   };
 
   void draw(map m);
}
```
Namespaces are open - you can add as many items to a namespace as you like by starting another namespace block.
```
namespace acme
{
   class maze
   {
      ...
   }
};
```