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

What is low-level formatting, What is low-level formatting?  Before a d...

What is low-level formatting?  Before a disk can store data, it must be divided into sectors that the disk controller can read and write. This process is known as low-level for

What is FIFO, What is FIFO? FIFO is used as buffering element or queui...

What is FIFO? FIFO is used as buffering element or queuing element into the system that is by common sense, is needed only while you slow at reading than the write operation.

Biscuit factory circuit, Biscuits move on a conveyer through an oven where ...

Biscuits move on a conveyer through an oven where they are cooked.   Two sensors, H and C, measure the temperature of the oven, H = 1 if the oven is too hot and C = 1 if the ove

Unification - artificial intelligence, Unification - Artificial intelligenc...

Unification - Artificial intelligence: We have said that the laws of inference for propositional logic detailed in the previous lecture can also be used in first-order logic.

What is an imperative statement, What is an imperative statement? Ans. ...

What is an imperative statement? Ans. Shows an action to be performed throughout execution of assembled program is an imperative statement.

The max number of calling modes stacked at one time is, The max number of ...

The max number of calling modes stacked at one time is? NINE

Data analysis and results in e-commerce, There were 50 respondents to our s...

There were 50 respondents to our survey. The first component of the data examined here focuses on student's preference (ecommerce or traditional commerce). The Second compone

Explain congestion, Explain CONGESTION. CONGESTION: This is uneconomi...

Explain CONGESTION. CONGESTION: This is uneconomic to provide sufficient equipment to carry entire traffic that could possibly be given to a telecommunication system. Inside

Use of parallel construct with private clause, Q. Use of parallel construct...

Q. Use of parallel construct with private clause? In this example we would see use of parallel construct with private and firstprivate clauses. At end of program i and j remain

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