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

Name the abap/4 modularization techniques, Name the ABAP/4 Modularization t...

Name the ABAP/4 Modularization techniques. Techniques are:- Source code module. Subroutines. Functions.

Desirable choice for the partitioning element in quick sort, A desirable ch...

A desirable choice for the partitioning element in quick sort is First element of the list.

What are the difference between heap and stack, What are the difference bet...

What are the difference between heap and stack? The Stack is more or less responsible for maintaining track of what's executing into our code or what's been "called". The Heap

Can we use write statements in screen fields, Can we use WRITE statements i...

Can we use WRITE statements in screen fields? If not how is data transferred from field data to screen fields? We cannot write field data to the screen using the WRITE stateme

Define process, Define Process. Process: It is a program in executi...

Define Process. Process: It is a program in execution; process execution should progress into sequential fashion. Process contains: program counter stack dat

Explain the random scan and raster scan displays, Define Random scan/Raste...

Define Random scan/Raster scan displays?  Random scan is a method in which the display is made by the electronic beam which is directed only to the points or part of the screen

Explain about programmer visible registers, Q. Explain about Programmer Vis...

Q. Explain about Programmer Visible Registers? Programmer Visible Registers: These registers can be employed by machine or assembly language programmers to minimize reference

What guarantees the integration of all application modules, What guarantees...

What guarantees the integration of all application modules? The R/3 basis system guarantees the integration of all application modules.  The R/3 basis s/w gives the run time e

Describe the types of flip-flops and latches, Describe the types of flip-fl...

Describe the types of flip-flops and latches. Flip-flops are of two types as illustrated below: a. Positive edge triggered b.  negative edge triggered Latches are

Explain the generic framework for electronic commerce, Explain the generic ...

Explain the generic framework for electronic commerce along with suitable diagram? Generic Framework for electronic commerce comprises the Applications of EC (as like banking,

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