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

Define some features of automatic variables in c program, Define Some Featu...

Define Some Features of Automatic Variables in C program? The features of automatic variables are like as Storage - memory Default initial value - an unpredictable value,

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

Write the program of function templates, Consider the following example: ...

Consider the following example: int max(int x, int y)                  {                                 return ( x > y) ? x : y ;                  }   float max

Define auto pointer?, A: The simplest instance of a smart pointer is auto_p...

A: The simplest instance of a smart pointer is auto_ptr that is included in the standard C++ library. Auto Pointer only takes care of Memory leak & does nothing regarding dangling

Sdsds, Given an integer n and a permutation of numbers 1, 2 ... , n-1, n wr...

Given an integer n and a permutation of numbers 1, 2 ... , n-1, n write a program to print the permutation that lexicographically precedes the given input permutation. If the given

Do friends break encapsulation?, A: No. If they're utilized properly, they ...

A: No. If they're utilized properly, they increase encapsulation. You frequently require splitting a class in half while the two halves will have distinct numbers of instances o

Input, I want to take 1.1 as input but when I am declaring it as float the ...

I want to take 1.1 as input but when I am declaring it as float the output is given as 1.1000000

Static data members and static member function, Static Data Members: A ...

Static Data Members: A data member inside the class can construct as static data member.   There are few guidelines to be followed when declaring static data member.

Explain the standard input/output iostream library, Question 1 Implemen...

Question 1 Implement a class stack which simulates the operations of the stack allowing LIFO operations. Also implement push and pop operations for the stack 2 Explain the c

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