always "using namespace std"?

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Why is “using namespace std” considered bad practice? 35 answers

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There is no "cstring type of string". The <cstring> header contains no string class, only functions (and the size_t type and the NULL macro). In your example, string would just be considered std::string .

As for using namespace . I usually just use it in a very small scope, such as inside of function bodies. Never in header files!

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