Why pointer variable to a function as an argument, Computer Engineering

Assignment Help:

Why pointer variable sometimes desirable to pass a pointer to a function as an argument?

Frequently, a called function needs to make changes to objects declared in the calling function. For example, the function, scan(), needs to access objects in the calling function to store the data read and converted into an object defined there. Therefore, we supply scan() with the address of objects rather than their values.

Another common use of pointers is to write functions that ''return'' more than one value. As we have seen, every function in C returns a value as the value of the function; however, if a function's meaning includes the return of several pieces of information, this single return value is not sufficient. In these cases, we can have the function return multiple data values indirectly, using pointers.

 


Related Discussions:- Why pointer variable to a function as an argument

Explain the concepts and definitions of e-commerce, The Internet has emerge...

The Internet has emerged as a major worldwide distribution channel for goods, managerial, services, and professional jobs. It has impacted market economics and industry structure,

Significance of xml in edi and electronic commerce, What is the significanc...

What is the significance of XML in EDI and electronic commerce?   XML has been defined as lightweight SGML XML shows great promise for its inherent ability to permit a " doc

Layers of distributed system architecture, Q. Layers of Distributed System ...

Q. Layers of Distributed System architecture? Layers of Distributed System architecture are: Presentation Layer is actual user interface. This layer receives input and

Determine the framed data including a parity bit, Determine the Framed data...

Determine the Framed data including a parity bit   For illustration when even parity is chosen, parity bit is transmitted with a value of 0 if the number of preceding

Posix threads and mutex, The objective of this practical assignment is to u...

The objective of this practical assignment is to use the POSIX environment to write a program that simulates the supply and demand between three processes: warehouse, factory and r

Networking, compare 2g , 3g , and 4g also with advantage of 3g and 4g.

compare 2g , 3g , and 4g also with advantage of 3g and 4g.

Dialog-task updates, Dialog-task updates are Synchronous updates.

Dialog-task updates are Synchronous updates.

Career after BSc CS, Sir,wish to receive guidance from you how to join in A...

Sir,wish to receive guidance from you how to join in Aeronautical Engineering after Bsc Computer Science. I am a Girl.Interested to work in AE field, it will be better to use in co

When the divide overflow is generated, Divide overflow is generated when ...

Divide overflow is generated when  (A) Sign of the dividend is dissimilar from that of divisor.  (B) Sign of the dividend is same as that of divisor.  (C) The first part

Give introduction to object oriented analysis and design, Introduction to o...

Introduction to object oriented Analysis & design: tools In case of OOAD, Unified Modelling Language (UML) is a well accepted language. It is used for constructing, visualizin

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