Programming in C++, 2nd Edition

(8) The typeid operator is useful to know

the types of strange objects. During pro-

gram execution, we can obtain their class

name.

(9) The keyword explicit is advanta-

geous to declare the constructors of a

class as being explicit.

(10) The keyword mutable is used when

we need to declare a constant object but

partly; that is, a specific data variable can

be modified.

(11) C++ allows defining variables with a dif-

ferent scope such as local, global, blocks

classes, functions, etc. ANSI C++ has

added a new keyword namespace to

declare a scope that has global variables.

The C++ standard library is the better ex-

ample of a namespace. ...