Fundamentals of Computer Programming and IT by Pearson

Functions in C++ 349

variable belongs to static storage class defined by static and external

keyword. From the above discus-

sion, we can state that there are two types of storage classes: (a) local and (b) global, and storage class specifiers

are auto, register, static, and extern.

Lifetime of variable : Every variable has lifetime, i.e. its time duration during which its status is active in

the program. We can also say that lifetime of a variable is the time gap between its declaration and cleanup.

The lifetime depends upon the storage class. For example, auto variable gets destroyed immediately when the

function execution is over ...