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

Explain about communication displays and matrix, Q. What is communication D...

Q. What is communication Displays and Matrix? Communication Displays Communication displays offer support in concluding frequency of communication whether congestion in me

Explain about double error detection bit, Q. Explain about Double Error Det...

Q. Explain about Double Error Detection bit? Let's presume now that two bit errors take place in data. Data received: So on -matching we conclude P3-D3 pair doesn't

Illustrate master-slave flip-flop, Q. Illustrate Master-Slave Flip-Flop? ...

Q. Illustrate Master-Slave Flip-Flop? Master slave flip-flop comprise two flip-flops. One is master flip-flop and other one is known as slave flip-flop. Fig below shows impleme

Explain call completion rate in telephone traffic, With reference to teleph...

With reference to telephone traffic, explain the terms CCR. CCR: Call completion rate is explained as the ratio of the number of successful calls to the number of call attemp

Final project, I need help coming with an idea for BSCE final project, whic...

I need help coming with an idea for BSCE final project, which is solvable in about a semester

What is database integration, What is database integration? Database in...

What is database integration? Database integration is the ability to give user-friendly and cost-effective software solutions for data infrastructure management by the interfac

Explain indirect cycle in control unit, Q. Explain Indirect Cycle in contro...

Q. Explain Indirect Cycle in control unit? Once an instruction is fetched the subsequent step is to fetch the operands. The instruction may have indirect and direct addressing

Bernstein conditions for detection of parallelism, Bernstein Conditions for...

Bernstein Conditions for Detection of Parallelism For implementation of instructions or block of instructions in parallel, it should be guaranteed that the instructions are ind

What is the principle of locality, What is "the principle of locality"? ...

What is "the principle of locality"? It's the nature of the processes that they refer only to the small subset of the total data space of the process. I.e. the process frequ

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