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

What is the best fit algorithm, The Best fit algorithm: The best fit metho...

The Best fit algorithm: The best fit method occurs the smallest free block whose size is greater than or equivalent to n. An algorithm to get such a block by traversing the whole

Type cast operator, What is  T y pe C a s t Op er a t o r :...

What is  T y pe C a s t Op er a t o r :   T h e f l o a t c a n b e c o n v e r t e d t o i n t e g e r v a l u

Program Preprocessor variable postfix , Run the following C++ program with ...

Run the following C++ program with and without preprocessor variable POSTFIX defined. #include using namespace std; extern "C" int atoi( const char *str );

C program for count the no which you want , # include stdio.h> # include...

# include stdio.h> # include string.h> # include conio.h> void main() {           int i=0,j=0,b=0,count=0;           int a[100];           for(i=0;i

Minimum Shelf, At a shop of marbles, packs of marbles are prepared. Packets...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with thes

Battleship game, Create a program to print a battleship grid to the console...

Create a program to print a battleship grid to the console and mark squares as destroyed

Source code, I hv an assignment to do, I almost done. But i cant find whats...

I hv an assignment to do, I almost done. But i cant find whats wrong- my code is to make a simple calculator using function''s all 4 patterns. I did like this- #include int add

#AREA UNDER CURVE, #question.Write a program to find the area under the cur...

#question.Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two po

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