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

Program to Find the Factorial of a Given Number, Program1: Write a progr...

Program1: Write a program to find the factorial of a given number. The input is user given. Final output is printed out on to the screen. Program2: Write a program to gene

Computer Science Engineering C++ Homework, Temperature Conversions. Problem...

Temperature Conversions. Problems 28 through30generate temperature-conversion tables. Use the following equations that give relationships between temperatures in degrees Fahrenheit

Control structures in cpp, C o n t r o l S t r u c t u r e s ...

C o n t r o l S t r u c t u r e s I t i s o f t h r e e t y p e s: 1 .    S e qu e n c e s t r u c t u r e 2 .

Explain function overloading, F u nction overloading: Functions can b...

F u nction overloading: Functions can be defined with same name.  Depending upon the type of argument passed the function will perform.  This is known function overloading

Program, Data array A has data series from 1,000,000 to 1 with step size 1,...

Data array A has data series from 1,000,000 to 1 with step size 1, which is in perfect decreasing order. Data array B has data series from 1 to 1,000,000, which is in random order.

When is a template a better solution than a base class, When you are design...

When you are designing a generic class to have or otherwise manage objects of other types, when the format and behavior of those other types are unimportant to their containment or

Spaning tree , what is the function of spanning tree in graph algorithm?

what is the function of spanning tree in graph algorithm?

Define bitwise-and operator, Define Bitwise-AND Operator: &:? The bitwi...

Define Bitwise-AND Operator: &:? The bitwise-AND operator (&) compares every bit of its first operand to the corresponding bit of its second operand. If both bits are 1 the mat

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