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If we use

using namespace std

in our source file, in which step is the definition of namespace imported to our source file?

Peter Mortensen
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supriya
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    Possible duplicate of [Why is "using namespace std;" considered bad practice?](https://stackoverflow.com/questions/1452721/why-is-using-namespace-std-considered-bad-practice) – Richard Critten May 30 '19 at 09:40

1 Answers1

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The definition of the namespace is imported when you write:

#include <iostream>

or 

#include <stdio.h>

by writing using namespace std you don't import the namespace, you allow using its entities without std prefix, like cout instead of std::cout

Andrey Chernukha
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