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?

Padovan string, padovan string program in java // aakash , suraj , p...

padovan string program in java // aakash , suraj , prem sasi kumar kamaraj college program 1 : package test.padovanstring; public class PadovanString {     publ

Prepare data from fixed ocr areas scanned, Prepare data from fixed OCR area...

Prepare data from fixed OCR areas scanned. Project Description: Project is to design software which can use character recognition only on certain areas of scanned pdf's/ jpeg

Do friends break encapsulation?, A: No. If they're utilized properly, they ...

A: No. If they're utilized properly, they increase encapsulation. You frequently require splitting a class in half while the two halves will have distinct numbers of instances o

Lcm code, full coding for lcm in c++

full coding for lcm in c++

Algorithm and flowchart, an algorithm and flowchart of finding the product ...

an algorithm and flowchart of finding the product of any two numbers

Wap avgerage score-assignment- standard deviation of student, finds the ave...

finds the average for all assignments for an individual student float getAverageForStudent(float scores[20][10], int student, int numAssignments) {  }  // finds the average for

Time table, programme for time table in c++

programme for time table in c++

C program, program for lexicographically precedes the given input permutati...

program for lexicographically precedes the given input permutation

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

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