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 to compute quadratic polynomial, Write a function that computes f(x...

Write a function that computes f(x) for a quadratic polynomial in x, such as the one in assignment 3. Use the function to plot f(x) from -10 to +10.

String-classes-constructors and member functions, Objective Using C++ s...

Objective Using C++ string, classes, constructors and member functions. Task A Write a program (book.cpp) to store a list of book titles and the published dates. Your pro

What is an iterator class?, A: A class which is used to traverse through th...

A: A class which is used to traverse through the objects maintained through a container class. There are _ve categories of iterators: output iterators, input iterators, forward ite

ALGORITHM, write a pseudocode algorithm for a program that accepts a number...

write a pseudocode algorithm for a program that accepts a number and prints out its reciprocal(1/n) is required.the program should prevent the user from entering zero by asking t

Password Validation Prgram in C++, Create a .cpp program that verifies the ...

Create a .cpp program that verifies the strength of a password that a user is entering is strong (complex/secure) enough. In the main area of the program, prompt the user to enter

Strings, A string S is said to be "Super ASCII", if it contains the charact...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

Explain the process of using the constructor, Using the Constructor The...

Using the Constructor There are basically three ways of creating and initializing the object. The first way to call the constructor is explicitly as :

Program for dynamic 2d memory, Requirements: 1.  This assignment as well...

Requirements: 1.  This assignment as well as other assignments in this class must be finished on Windows operating system. 2.  Zip your program and submit the zip file on ANG

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