C++ NamespacesLesson 57Free preview

C++ Namespaces

This lesson is part of C++ · All levels

Summary

Namespace is a logical container that groups names such as functions, classes, and variables so as not to clash between program parts. The term std is the C++ built-in namespace for all standard libraries, and we can use it complete with std::cout or using the namespace std. Namespace can also be clustered, so large project code organizations stay neat and easy to search for.

Key points

Namespace is written namespace Name {...} and its members are called by Name::member.
Std contains all components of the C++ standard library.
Using namespace std; cutting down the spelling std:: but risking causing name conflicts.
The clustered namespace and the use-declaration (using std::cout) are a safer alternative.

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