Define external storage class - computer programming, C/C++ Programming

Assignment Help:

Define External Storage Class - computer programming?

When a variable is declared outside a function the storage is permanently assigned to it and its storage class is 'extern' and a declaration for an external variable can look just the name as a local variable declaration. Such a variable is considered to be as global to all functions declared later than and upon exit from the function or block, the external variable remains in existence. These variables are able to be accessed by any function in the program.

Illustration is

extern int a=1, b=2;

The External variables never disappear because they exist throughout the execution life of the program and they can be used to transmit value across functions. They may be unseen if the identifier is redefined.

All the functions have external storage class. This signifies that the key word extern can be used in function prototypes and in function definitions. 


Related Discussions:- Define external storage class - computer programming

Explain virtual functions, Virtual Functions The keyword virtual was pr...

Virtual Functions The keyword virtual was previously used to resolve ambiguity for a class derived from two classes, both having a common ancestor. These classes are known as v

Fill an array of randomly generated integers, The task consists of two part...

The task consists of two parts which are both preferably implemented in one source file. Towards the end of this document you will find a code skeleton that you must assume. Start

Pseudocode , Record separation problem Let us assume that a particular data...

Record separation problem Let us assume that a particular database program manages a simple mailing list which consists of one record for each person on the list, and a number of f

Friends of classes, Define the following Window class : - integer  data mem...

Define the following Window class : - integer  data members, width and height - a constructor  that accepts two integer  parameters  (width followed by height) and uses them to ini

Input data analysis, Create a class Word, representing a word. Two words sh...

Create a class Word, representing a word. Two words should be considered equal if they consist of the same sequence of letters and we consider upper case and lower case as equal. F

Minimum Shelf , At a shop of marbles, packs of marbles are prepared. Packet...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers

What does throw; (with no exception object after the throw , What does thro...

What does throw; (with no exception object after the throw keyword) mean? Where would I employ it? A: You should see code that looks something like this: class MyException

Board coloring, in this problem you are given a board in which some of the ...

in this problem you are given a board in which some of the elements are placed as shown in below diagram.each element represent a color.fill the other element in the board,such tha

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd