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

C++, what is polymorphism

what is polymorphism

What is phase encoding, What is phase encoding or Manchestor encoding? ...

What is phase encoding or Manchestor encoding?  It is the method for combining clock information with data. It is a scheme in which alters in magnetization occur for each data

Various phases of consumer merchantile model, What are the various phases o...

What are the various phases of consumer merchantile model and also differentiate between prepurchase interaction & post purchase interaction.    There are three phase of consumer

Total number of registers in a cpu, Q. Total number of registers in a CPU? ...

Q. Total number of registers in a CPU? Factors to consider when choosing total number of registers in a CPU are:  CPU can access registers faster than it can access m

Explain rby and cmyk colour printing, Q. Explain RBY and CMYK colour Printi...

Q. Explain RBY and CMYK colour Printing? For good printing printers don't use RBY in place of that they use CMYK (Cyan instead of Blue, Magenta instead of Red, Yellow and a sep

How the canvas class and the graphics class are linked, A Canvas object giv...

A Canvas object gives access to a Graphics object by its paint() method.

Difference between viewstate and sessionstate, What Is The Difference Betwe...

What Is The Difference Between ViewState and SessionState? View State persist the values of controls of certain page in the client (browser) when post back operation done. When

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