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

Prove equations by using the boolean algebraic theorems, Prove the equation...

Prove the equations using the Boolean algebraic theorems that is given below A‾BC + AB‾C + ABC‾+ ABC = AB + BC + AC Ans. The equation given is A‾BC + AB‾C + ABC‾+ ABC = AB + BC +

Why is xml such an important development, It takes away two constraints whi...

It takes away two constraints which were holding back Web developments: 1. Dependence on a one, inflexible document type (HTML) which was being much abused for tasks it was neve

Disadvantages of unauthenticated sites, Disadvantages of unauthenticated si...

Disadvantages of unauthenticated sites All the Units entering the Intranet must be scrutinised to ensure that they are not coming from the unauthenticated sites or users. It a

How a typical dma controller can be interfaced to an 8086, Demonstrate how ...

Demonstrate how a typical DMA controller can be interfaced to an 8086/8085 based maximum mode system.  For 8088 in maximum mode: The RQ/GT0 and RQ/GT1 pins are used to is

What is the difference among save and save as, Use SAVE when you are revisi...

Use SAVE when you are revising an existing document. Use SAVE AS when you are making a new document from scratch or an existing document. This will remain the original document

Determine the output of T-flipflops in cascade, If  the input to T-flipflop...

If  the input to T-flipflop is 100 Hz signal, the final output of the three T-flipflops in cascade is ? Ans. The  final  output  of  the  three  T-flip-flops in cascade is 12.5 H

Ict, how to become an ict enginer

how to become an ict enginer

Explain about the biometrics, Explain about the Biometrics  This inclu...

Explain about the Biometrics  This includes obtaining data and identifying characteristics automatically in security systems e.g. use of palm prints, finger prints, facial ima

#title.sequential circuit, design modulo 12 up synchronous counter using t ...

design modulo 12 up synchronous counter using t flip flop

SWOT ANALYSIS, OPPORTUNITIES AND THREATS IN COMPUTER FEILD

OPPORTUNITIES AND THREATS IN COMPUTER FEILD

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