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 about inheritance, Inheritance and Reuse Consider a car manufac...

Inheritance and Reuse Consider a car manufacturing company. When they require building a new car, they have two choices. They can start from the scratch, or they can change an

C program to copy the contents of a file, C Program to copy the contents of...

C Program to copy the contents of a file: void main()    {   ifstream fin("input.txt");   ofstream fout("output.txt");   char ch;   while (fin)       {

Array, Assigning value to individual elements in array

Assigning value to individual elements in array

Explain the array types, Array types An array is a collection of object...

Array types An array is a collection of objects of a one data type. The individual objects are accessed by their position in the array. This way of accessing is known as indexi

Oop, what is oop?

what is oop?

Blackjack Game help, I can''t figure out how to stop the programming from h...

I can''t figure out how to stop the programming from hitting for the player even when they type in stand.

Assignment, Programming Assignment # 1 C and UNIX   The purpose of this ...

Programming Assignment # 1 C and UNIX   The purpose of this assignment is to get you more familiar with Unix/Linux and those constructs of C that are not part of C++. Write a C

Program is to find the area of room, Program is to find the area of room: ...

Program is to find the area of room: Program is to find the area of room with default values using classes & object class room   {   private:     int len;     i

List any six commonly found programming errors, List any six commonly found...

List any six commonly found programming errors in a C program Six commonly found errors in a C program are: 1.  Missing or misplaced  ; or  }, missing return type for a proc

Microprocessors and motherboards, The heart of the modern electronic system...

The heart of the modern electronic system is the microprocessor e.g. the video, sound, game consoles, portable phones and domestic appliances. Let us consider the heart of a home c

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