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

Development of a successful system, The success of a system relies on the a...

The success of a system relies on the approach of building it. If development approach is right then system will work successfully. Figure below portrays a System Development Life

Network, Give an intuitive explanation of why the maximum throughput, for s...

Give an intuitive explanation of why the maximum throughput, for small beta, is approximately the same for CSMA slotted Aloha and FCFS splitting with CSMA. Show the optimal expecte

State the term organizational structure, State the term Organizational Stru...

State the term Organizational Structure. A business organization might be structured in many various ways, depending on the environment in that this operates. There are alwa

Ict, how to become an ict enginer

how to become an ict enginer

What is virtual memory, What is virtual memory? Virtual memory is a met...

What is virtual memory? Virtual memory is a method used in some large computer systems that allow the user to construct program as by a large memory space were available, equal

Explain importance of different types of distributing frames, Explain impor...

Explain importance of the different types of distributing frames used in exchanges. Here MDF = main distribution frame; MF = main feeder; FP = feeder point; BF = branch f

Features added in message passing interface-2, Q. Show the Features added i...

Q. Show the Features added in message passing interface-2 Input/output Single-sided operations for remote memory access Binding for C++ Dynamic process managem

4 bit comparator, how to breadboARD THE 4 BIT COMPARATOR

how to breadboARD THE 4 BIT COMPARATOR

Explain a schematic diagram of thousand line exchanges, Using a combination...

Using a combination of uniselectors and two motion selectors draw a schematic of thousand line exchanges. The schematic diagram for such an exchange is demonstrated in Fig. All

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