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

Real time OS, what is the usuage of Real time Os

what is the usuage of Real time Os

What is the use and function of file transfer protocol, What is the use and...

What is the use and function of File Transfer Protocol? FTP : File Transfer Protocol (FTP) is the protocol used upon the Internet for sending files and is usually used fo

Java, what is inheritence and all types in java?

what is inheritence and all types in java?

Quick sort , Write Quick sort non recursive program

Write Quick sort non recursive program

Write your array of text into file, Part I: 1. The program starts by prin...

Part I: 1. The program starts by printing your initial with an end sign ">". For example, "cjx >"; 2. Then, you can type in the following "vi filename". For example, "vi myp.c

What are the advantages of using xml over html, What are the advantages of ...

What are the advantages of using XML over HTML? The root cause of the problem lies within HTML that is Hyper Text Markup Language, the defector standard for web publication. Th

Propositional model, Propositional model: Hence a propositional model ...

Propositional model: Hence a propositional model was simply an assignments of truth values to propositions. In distinguish, a first-order model is a pair (Δ, Θ) where

Virtual manufacturing system, Virtual Manufacturing System Virtual manu...

Virtual Manufacturing System Virtual manufacturing system or VMS is a synthetic, integrated manufacturing environment, developed by using information technology tools, exercise

Average access time experienced by the processor, Give the formula for the ...

Give the formula for the average access time experienced by the processor in a system with 2 levels of caches. Ans: Formula is for the average access time experienced by the pr

Explain instruction cycle and execution cycle, Q Explain Instruction cycle ...

Q Explain Instruction cycle and Execution cycle. and also explain Instruction Counter, Memory Address Register and Memory Buffer Register.

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