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

Board coloring, programing code on board coloring in clanguage

programing code on board coloring in clanguage

Write a c program as text layout, Your task in this project is to write a C...

Your task in this project is to write a C program named layout.c which does text layout. This is a staged project, complete the stages in order. The maximum mark if you nish each

Sentinel controlled loop, develop an algorithm using pseudocode for computi...

develop an algorithm using pseudocode for computing cos(x) and sin(x). use a sentinel controlled while loop. use the series definition of e^+-jx

Explain logical operators, Logical Operators We say any expression that...

Logical Operators We say any expression that evaluates to zero is a FALSE logic condition and that evaluating to non-zero value is a TRUE condition. Logical operators are usefu

Write a structured and annotated c program, Intelligent homes are becoming ...

Intelligent homes are becoming increasingly popular as the cost/performance ratio of microcontrollers is continuously dropping.  These systems incorporate various transducers to de

Simple program of c++ , Simple program of c++: int main() {    i...

Simple program of c++: int main() {    int   bushels;    float dollars, rate;                 cout                 cin >> dollars;                 cout

The Shell or Command Line Interpreter is the fundamental Use, 1. The shell ...

1. The shell must support the following internal commands: i. cd - Change the current default directory to . If the argument is not present, report the current directory. If t

Function declarations and function definitions in cpp, FUNCTIONS It refe...

FUNCTIONS It refers to a subprogram that is meant to do a certain task. It is basically used to execute a set of operations and return information to the main or calling functio

Programming, what is the first thing I need to know about Programming?

what is the first thing I need to know about Programming?

Determine the size of operator, The size of () operator This is a pseud...

The size of () operator This is a pseudo-operator given by the language, which returns the number of bytes taken up by a variable or data type. The value returned by this opera

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