A Comprehensive Guide to C++ Namespaces: Tips to Avoid Naming Conflicts

In C++, defining elements with the same name in different files or modules causes naming conflicts that compilers cannot resolve. Namespaces solve this issue through "folder"-style isolation, defined using `namespace Name { ... }` to group code and avoid interference from elements with the same name. There are two usage methods: directly accessing specific elements with `Namespace::ElementName`; or introducing an entire namespace with `using namespace Namespace` (use cautiously in header files and with caution in source files to avoid global pollution). Advanced techniques include anonymous namespaces (only visible within the current file, protecting private details) and nested namespaces (multi-level grouping, with simplified syntax supported in C++17). Usage suggestions: divide namespaces by function, avoid excessive nesting, disable `using namespace` in header files, and prefer the scope resolution operator. Proper use of namespaces is fundamental to modularizing C++ code.