Define auto pointer?, C/C++ Programming

Assignment Help:

A: The simplest instance of a smart pointer is auto_ptr that is included in the standard C++ library. Auto Pointer only takes care of Memory leak & does nothing regarding dangling pointers issue. You can determine it in the header . Here is part of auto_ptr's implementation, to illustrate what it does:

template class auto_ptr

{

T* ptr;

public:

explicit auto_ptr(T* p = 0) : ptr(p) {}

~auto_ptr() {delete ptr;}

T& operator*() {return *ptr;} T* operator->() {return ptr;}

// ...

};

As you can illustrate, auto_ptr is a simple wrapper around a regular pointer. It forwards all significant operations to this pointer (dereferencing & indirection). Its elegance within the destructor: the destructor takes care of deleting the pointer.

For the user of auto_ptr, it means that rather then writing:

void foo()

{

MyClass* p(new MyClass);

p->DoSomething();

delete p;

}

You can write down following:

void foo()

{

auto_ptr p(new MyClass);

p->DoSomething();

}

And trust p to clean up after itself.

 


Related Discussions:- Define auto pointer?

Pebble merchant problem, Problem Description There is a pebble merchant. H...

Problem Description There is a pebble merchant. He sells the pebbles, that are used for shining the floor. His main duty is to take the length of the room’s sides. But he sometime

Standard template library , The STL details are described in many places on...

The STL details are described in many places online (see the CS377 webpage for some links), and there's a very quick introduction in Section A.14. Here are just a few additional no

Stack, c++ program to to implement multiple stacks using single array

c++ program to to implement multiple stacks using single array

Luminous Jewels - The Polishing Game, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Record of student and calculating marks using ctotal, reocord of a student ...

reocord of a student and a function ctotal to calculate the marks of any three subject by using ctotal() function

Computes the ackermann-peter a m-n function, (a) Write a procedure that com...

(a) Write a procedure that computes the Ackermann-Peter a(m,n) function. (b) Write a helper procedure that only allows the calculation of the Ackermann-Peter function for 0≤m

Luminous Jewels - Polishing Necklace, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Function, write a function named "fact"that takes one integer arguments,ca...

write a function named "fact"that takes one integer arguments,call them "num" and returns as ..............

But operator overloading makes class look ugly; isn''t it , Q: But operator...

Q: But operator overloading makes class look ugly; isn't it assumed to make my code clearer? A: Operator overloading makes life simpler for the users of a class, not for develop

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