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

Derived data type, Derived Data Type: Array is derived data type to sto...

Derived Data Type: Array is derived data type to store large collection of data of only one data type. int mark[100]; char names[25]; Function: will be discussed early

What do you mean by inheritance, Inheritance is the process of forming new ...

Inheritance is the process of forming new classes, called derived classes, from existing classes or base classes. The derived class inherits all the capabilities of the base class,

C program to store all ascii char into a file, Program is to store all ASCI...

Program is to store all ASCII char into a file: void main()     {   ofstream  fout("ascii.txt");   int i,n=256;   for(i=1;i     {     fout     }

How can one make it so keys pressed through users are , How can one make it...

How can one make it so keys pressed through users are not echoed on the screen? A: It is not a standard C++ feature. C++ doesn't even need your system to have a keyboard or a sc

What if one can''t wrap the local in an artificial block?, What if one can'...

What if one can''t wrap the local in an artificial block?

Srand and rand(), Mention clearly about srand and rand().

Mention clearly about srand and rand().

C program for swapping the string, C Program for SWAPPING THE STRING #i...

C Program for SWAPPING THE STRING #include conio.h> #include stdio.h> void main() {           char a[50],temp=0;           int i=0,c=0,c1=0,l=0;           clr

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