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?

I need file transfer solution, We move a high quantity of large Video files...

We move a high quantity of large Video files (200mb - 2 GB each) across the internet. We have a Linux server (ubuntu) hosted in a datacenter (1Gbps) operating an FTP server. Our

C program for function of find the factorial , C Program for FUNCTION OF FI...

C Program for FUNCTION OF FIND THE FACTORIAL float factorial(float); void main() {           float i=0,c=0;           clrscr();           printf("ENTER THE DIGI

Program is to define a class as teacher, Program is to define a class as te...

Program is to define a class as teacher: Program is to define a class as teacher and collect information about them by using classes and object class teacher   {   pr

Write a program to change the matrix program, Change the matrix program (pr...

Change the matrix program (program 3) slightly. Overload == operator to compare two matrices to be added or subtracted. i.e., whether the column of first and the row of second

Want an ea project for jack bsher, Want an EA project for Jack Bsher Pro...

Want an EA project for Jack Bsher Project Description: New EA game Skills required   Android, C++ Programming, PHP, Metatrader, SQL

ARRAY, A PROGRAM TO CALCULATE AREA OF TRIANGLE

A PROGRAM TO CALCULATE AREA OF TRIANGLE

Minimum shelf, At a shop of marbles, packs of marbles are prepared. Packets...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with thes

Memory management operator, Memory Management Operator In C malloc( ), ...

Memory Management Operator In C malloc( ), calloc( ), realloc( ), and free( ) are used to mange dynamic memory.  In addition to these function C++ have derived two unary ope

Operation on list - c++ program, Operation on list - c++ program: Writ...

Operation on list - c++ program: Write a program in c to Insert value on list and list iteration. typedef struct item *node_ptr; struct item {                   int e

Define difference among new & malloc?, Both malloc & new functions are util...

Both malloc & new functions are utilized for dynamic memory allocations & the basic difference is: malloc need a special "typecasting" while it allocates memory for eg. if the poin

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