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

Program for implementation of a data storage system, Introduction:  This...

Introduction:  This assignment requires a knowledge of variables (integers, char types), loops, conditionals, switch, functions, char arrays, string arrays, number arrays, struc

What does it mean to declare a member function as a virtual, What does it m...

What does it mean to declare a 1.      member function as a virtual A: (a) C++ virtual function is member function of any class, whose functionality may be over- ridden in

Define array of structures, Define Array of Structures? An Array of Str...

Define Array of Structures? An Array of Structures is an assortment of the same data types which are declared as structures. It is useful to store large and different number of

Explain the loop statements in computer programming, Explain the Loop State...

Explain the Loop Statements in Computer Programming? 1. C gives you a choice of three kinds of loop, while, do while and for. 2. The while loop remain repeating an action until

Prob, Given an integer n and a permutation of numbers 1, 2 ... , n-1, n wri...

Given an integer n and a permutation of numbers 1, 2 ... , n-1, n write a program to print the permutation that lexicographically precedes the given input permutation. If the given

Luminous Jewels - The Polishing Game, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Program to find a greatest string: c - program , Program to find a Greatest...

Program to find a Greatest String: C - Program: Write a program find largest string by c program. int main( int argc, char *argv[] ) {     if( argc         {

Algorithm, Write an algorithm to print all even numbers in descending order...

Write an algorithm to print all even numbers in descending order and draw the flowchart.

Boardcoloring, color representation 0,1,2,3,4,5,6,7,.......

color representation 0,1,2,3,4,5,6,7,.......

The Polishing Game, Byteland county is very famous for luminous jewels. Lum...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

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