Write examples of declarations of external variables, Computer Engineering

Assignment Help:

Examples of declarations of external variables  that  are  not definitions:

extern char stack[10];

extern int stkptr;

These declarations tell the compiler that the variables stack[] and stkptr are defined elsewhere, usually in some other file. If the keyword extern were omitted, the variables would be considered to be new ones and memory would be allocated for them. Remember, access to the same external variable defined in another file is possible only if the keyword extern is used in the declaration.

/* File : ext.c

This example shows reference to an external variable in more than one file. The program is organized in three files. The external variable 'a1' is defined in 'ext.c', and it is declared as extern in 'FILE3.c' */

 

 


Related Discussions:- Write examples of declarations of external variables

Discuss about charles babbage in brief, Discuss about Charles Babbagein bri...

Discuss about Charles Babbagein brief Mechanism  for  advancing  or  reversing  of  control  card  were  allowed  therefore enabling execution of any desired instruction. In ot

Search in problem solving - artificial intelligence, Search in Problem Sol...

Search in Problem Solving: If Artificial Intelligence can inform that the other science about anything, it is about problem solving and, in particular, how to research after s

Illustrate about object oriented development, Illustrate about object orien...

Illustrate about object oriented development object oriented development is not direct way of system development as in this approach a holistic view of application domain is co

Representation scheme in artificial intelligence, Representation scheme in ...

Representation scheme in artificial intelligence: It is not hard to see why logic has been popular representation scheme in AI: In this way, It is easy to represent knowl

Functions in first-order logic sentences, Functions in first-order logic se...

Functions in first-order logic sentences - artificial intelligence: Functions may be thought of as special predicates, where we think of all but 1 of the arguments as input and

Interrupt handling - computer architecture, Interrupt handling: Handlin...

Interrupt handling: Handling Interrupts  Several  situations where the processor should avoid interrupt requests Interrupt-enable Interrupt-disable  Typical

Define assembly, Define Assembly Assembly is a one deployable unit that...

Define Assembly Assembly is a one deployable unit that contains information about the execution of classes, structures and interfaces. it also keeps the information about itsel

Maximum number of nodes in a binary tree, The maximum number of nodes in a ...

The maximum number of nodes in a binary tree of depth 5 is 31 is the maximum number of nodes in a binary tree

How to reduce the maximum quantization error, In successive-approximation A...

In successive-approximation A/D converter, offset voltage equal to 1/2 LSB is added to the D/A converter's output. This is done to ? Ans. It is done to reduce the maximum quantiz

What are the fundamental steps in program development, What are the fundame...

What are the fundamental steps in program development The basic steps in program development are as follows: a. Program coding, design and documentation. b. Preparation o

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