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Same namespace in multiple places



Same namespace in multiple places

A namespace can be defined in different parts of the program. All the objects that are in different parts of a program, but if in same namespace will form one namespace. For better understanding, look on example: 

namespace myFirstNamespace
{
	void foo()
	{
		cout << "foo from myFirstNamespace is called" << endl;
	}
}
namespace mySecondNamespace
{
	void foo()
	{
		cout << "foo from mySecondNamespace is called" << endl;
	}
}
namespace myFirstNamespace
{
	int x = 10;
}
int main()
{
	myFirstNamespace::foo();
	cout << "X = " << myFirstNamespace::x << endl;
	cout << "Y = " << myFirstNamespace::y << endl;
	return 0;
}
namespace myFirstNamespace
{
	double y = 3.14;
}

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