using namespace namespace_identifier // directive statement
using namespace_identifier :: member // declaration method
The first statement allows the access of elements without using a scope access operator.
The second statement allows access to only given elements.
Accessing namespace
using name space num
n=10;
// valid statement
show(15);
// valid statement
using name space :: n;
m=20;
// valid statement
show(14)
// invalid statement
21.7 NESTED NAMESPACES
It is also possible to declare a nested namespace. When one namespace is nested in another
namespace, it is known as a nested namespace.
Nested ...
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