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

How to save your file in dreamweaver, HOW TO SAVE YOUR FILE? Step 1: Cl...

HOW TO SAVE YOUR FILE? Step 1: Click on FILE Step 2: Click on SAVE Step 3: Choose the folder in which you want to save Step 4: Provide a name to the file (with .htm /

When one speech sample appears in time multiplexed system, In a time multip...

In a time multiplexed space switching system, one speech sample appears every? One speech sample shows every 125 micro sec, in a time multiplexed space switching system.

Technology management, These five questions are part of the assignment. The...

These five questions are part of the assignment. The answers of each question can be written in around 300 words (with relevant diagrams and Refrences). Assignement should be comnp

Distinguish between ROM, Distinguish between ROM, PROM, EPROM, EEPROM. ...

Distinguish between ROM, PROM, EPROM, EEPROM. Ans: ROM: It also called Read Only Memory is a Permanent Memory. The data is permanently stored and cannot be changed in Perm

++ c, how to find the integral of a function represented by collection of e...

how to find the integral of a function represented by collection of experimental data

Programming, how can compare alphabates of two words in c programming ?????...

how can compare alphabates of two words in c programming ?????

Hypertext markup language, Web pages or materials which are in the form of ...

Web pages or materials which are in the form of hypermedia documents accessed through Internet can be located anywhere in world. No matter from where they originated, most Web d

What is assembly language, What is assembly language? Assembly languag...

What is assembly language? Assembly language : It is a family of low-level language for microprocessors, programming computers, microcontrollers etc. All are implement a symbo

what is code for adding two integers in java?, import java.util.Scanner;  ...

import java.util.Scanner;   class AddNumbers {    public static void main(String args[])    {       int x, y, z;       System.out.println("Enter two integers to calculate their sum

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