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

What is exception, a. Explain about exception? When do they occur? Show usi...

a. Explain about exception? When do they occur? Show using an example how to give your own exception handler. b. Can you restrict the types of exception that a function can thro

Explain about the mini computers, Explain about the MINI COMPUTER Minic...

Explain about the MINI COMPUTER Minicomputers are much smaller in size than mainframe computers and they are also less expensive.  The cost of these computers can differ from a

Boolean algebra, https://www.chegg.com/homework-help/questions-and-answers/...

https://www.chegg.com/homework-help/questions-and-answers/57-karnaugh-maps-7-diagram-shows-system-hot-chocolate-drinks-vending-machine-vending-machi-q91661540

What is the system call available to transmit a signal, What is the system ...

What is the system call available to transmit a signal? System call Kill is used to send a signal to a method or a group of processes. Int kill (pad tepid, Int sig); This

Role of bitmap indexes to solve aggregation problems, Describe about the ro...

Describe about the role of bitmap indexes to solve aggregation problems? Ans) Bitmaps are very useful in begin schema to join large databases to small databases. Answer queries

State about the computer memories, Computer Memories Computer memories...

Computer Memories Computer memories are either external or internal. Internal memories are either RAM (random access memory) or ROM (read only memory). External memories can t

How is basic authentication worked, How is basic authentication worked? ...

How is basic authentication worked? When an exact resource has been protected using fundamental authentication, Apache sends a 401 Authentication needed header along with the r

Implement the concept of true and radix minus one complement, Q. Develop a...

Q. Develop a program to implement the concept of true and radix minus one complement. Program should ask for radix and two numbers from that radix. For that two numbers program

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