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

Online movie booking system using data structures, I want to know...if ther...

I want to know...if there is a program available in C code using data structure for online movie booking system

Computer to computer transmission of structured data, Computer to computer ...

Computer to computer transmission of structured data using standardised documentation is known as Electronic data interchange (EDI).

Sigmoid units-artificial intelligence, Sigmoid units - Artificial intellige...

Sigmoid units - Artificial intelligence Remember that the function inside units take as input the weighted sum, S, of the values coming from the units associated to it. The fun

What is a symbolic constant, What is a symbolic constant? How it is defined...

What is a symbolic constant? How it is defined ? Symbolic constants are constants of any type declared by using the #define compiler directive. It is a preprocessor directive.

Explain briefly the function of layers, Explain briefly the function of dif...

Explain briefly the function of different layers which are covered under end to end layer connectivity. Different layer are as follows: 1. Transport Layer:  This is res

Explain chaining method, Chaining: In this method, instead of hashing func...

Chaining: In this method, instead of hashing function value as location we use it as an index into an array of pointers. Every pointer access a chain that holds the element having

#title.sequential circuit, design modulo 12 up synchronous counter using t ...

design modulo 12 up synchronous counter using t flip flop

What kind of system do we need to run gimp, Any system able of run Gnome 2,...

Any system able of run Gnome 2, KDE 3.2, Windows 2000, Mac OS X and later versions should be capable to run GIMP. GIMP's biggest appetite is for memory and how much you will requir

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