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How many types of namespace are there in c++
2 Respostas
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In fact, as much as necessary.
But I do not advise you to use more than 2 connected namespace in large projects, because then it will be difficult to debug problems.
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A banal example:
suppose, you use only the standard library and boost, so you decided to write everywhere:
using namespace std;
using namespace boost;
...and now there is a new version of the standard library, in which many classes are transferred from boost. And suddenly your code no longer compiles.
Draw conclusions, bro)