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?

Radix sort - c program, Radix sort - C program: Write a program in c t...

Radix sort - C program: Write a program in c to define a radix sort. void main() {  int array[100],n;  int i;  void radix(int *,int);  printf ("How many nos\

Functions, differentiate between inbuilt and user defined functions

differentiate between inbuilt and user defined functions

C program to find area of rectangle, Aim: To implement a program to find a...

Aim: To implement a program to find area of rectangle, surface area of box and volume of box using virtual functions. Code:                       class rect {

Logic behind object oriented programming, In this we will take a closer loo...

In this we will take a closer look at the logic behind Object Oriented Programming.  Read through the pseudocode listed below and answer the following questions. Class Square

Last ant on rod, There are ''n'' ants on a ''n+1'' length rod. The ants are...

There are ''n'' ants on a ''n+1'' length rod. The ants are numbered from 1 to n and are initially placed at positions starting from position 1 till position n. They are moving eith

Static data meber and const data meber, can we use const data member in sta...

can we use const data member in static. member function with example.

Area under curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

PLS URGENT HELP WITH C++, Pls i only need help with program 2. #include ...

Pls i only need help with program 2. #include #include using namespace std; int main() { int FilingStatus; cout cout cout cout cout cout

Develop online slot video game for facebook, Develop Online Slot Video Game...

Develop Online Slot Video Game for Facebook Prepare an online slot video game for a Facebook promotion in order to draw new visits and Increase the number of "likes" of the Face

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