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

Background and foreground colors can be interchanged, Background and foregr...

Background and foreground colors can be interchanged using the command?? Format Inverse command.

Rational performance of an agent - artificial intelligence, Rational perfor...

Rational performance of an agent - artificial intelligence: To summarize, an agent takes input from its violence and affects that environment. The rational performance of an a

Fuzzy logic - artificial intelligence, Fuzzy Logic - artificial intelligenc...

Fuzzy Logic - artificial intelligence: In the above logic, we have been concerned with truth whether propositions and sentences are true. But, with some natural language statem

Show typical microprocessor system architecture, Q. Show typical microproce...

Q. Show typical microprocessor system architecture? A microprocessor system bus consists of three physical buses: the address bus, the data bus, and the control bus. The types

Give example of stack using encapsulation of OOA, Give example of stack usi...

Give example of stack using encapsulation of OOA An example of the Stack.  A Stack abstraction provides methods like pop (), push (), isEmpty(), isFull(). The Stack can be i

Can we specify the next screen number with a variable, Can we specify the n...

Can we specify the next screen number with a variable:- Yes, we can specify the next screen number with a variable.

Prove using boolean algebra, Q. Prove using Boolean Algebra 1. AB + AC ...

Q. Prove using Boolean Algebra 1. AB + AC + BC' = AC + BC' 2. (A+B+C) (A+B'+C') (A+B+C') (A+B'+C)=A 3. (A+B) (A'+B'+C) + AB = A+B 4. A'C + A'B + AB'C + BC = C + A'B

Dram, DRAM consists of MOSFET's but the technique is to use the drain sourc...

DRAM consists of MOSFET's but the technique is to use the drain source capacitance to hold charge. If charge is present logic '1' is held, no charge logic '0'. As you know capacito

How to create an html document, An HTML document can be created by using an...

An HTML document can be created by using any HTML editor or text editor such as notepad etc. STEPS FOR CREATING A SIMPLE HTMLPROGRAM   1. Go to Start -> Programs->A

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