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

Loops, how many types of loops are there and whay are they and what are its...

how many types of loops are there and whay are they and what are its uses

Program to calculate the n factorial, Debug the following program to calcul...

Debug the following program to calculate N! #include using namespace std; main() {             int N, factorial=1;             cout             cin >> N;

File Input and Output, Given a bool variable isReadable write some statem...

Given a bool variable isReadable write some statements that assign true to isReadable if the file "topsecret" exists and can be read by the program and assigns false to isR

Write a c program to calculate the equation, Write a C program to calculate...

Write a C program to calculate the output Y for a given value of X for the following formula   Y=X 2 + 2X +3   #include stdio.h   void main()   {   char promt;   float y,x

Program that predicts users age, Program: Write a program that predicts...

Program: Write a program that predicts users' age (0-128 years old) with at most 7 questions. The game starts with asking the user whether he/she is younger or older than G (an

C++, Program to print the total marks and percentage of the 3 students usin...

Program to print the total marks and percentage of the 3 students using array

Insert values in queue - c++ program, Insert values in queue - C++ program:...

Insert values in queue - C++ program: Write a program to insert values in queue. int main()   {         int k;     Queue timeLine;     cout     for(

COMPUTER, THEORY OF COMPUTER PROGRAMMING

THEORY OF COMPUTER PROGRAMMING

C program to allocate memory dynamically for 2-d array, Aim: To implement ...

Aim: To implement a program to allocate memory dynamically for 2 dimensional array (accept and print matrix) using pointers. Code:                       #include #inc

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