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?

Minimum shelfs, Write a program that finds the minimum total number of shel...

Write a program that finds the minimum total number of shelves, including the initial one required for this loading process

Boardcoloring, how to fill the blank space in4*4 matrix?

how to fill the blank space in4*4 matrix?

Function that has two int parameters number , Write a function that has two...

Write a function that has two int parameters num and n, and returns TRUE when the nth bit in num is 1, otherwise FALSE. This function should use the function in the above problem.

Create program to prints out the value of a variable, Here is a short progr...

Here is a short program. It prints out the value of a variable "x". Ernie and Bert disagree about what will be printed: Ernie says, the value gets changed in "changeX" so it will p

Tower of hanoi, application problem of tower of hanoi

application problem of tower of hanoi

Derived data type, Derived Data Type: Array is derived data type to sto...

Derived Data Type: Array is derived data type to store large collection of data of only one data type. int mark[100]; char names[25]; Function: will be discussed early

Define the data types of c language, Define the Data Types of c language? ...

Define the Data Types of c language? The C has a concept of 'data types' which are used to define a variable before its use and the definition of a variable will assign storage

Hotel booking, Construct a console program to manage the booking of a Hotel...

Construct a console program to manage the booking of a Hotel room.

Write a structured and annotated c program, Intelligent homes are becoming ...

Intelligent homes are becoming increasingly popular as the cost/performance ratio of microcontrollers is continuously dropping.  These systems incorporate various transducers to de

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