`std::auto_ptr` is a class template that provides a smart pointer that manages an object with ownership semantics. When an `auto_ptr` object is destroyed, it automatically calls the `delete` operator on the managed object. This can help prevent memory leaks by ensuring that dynamically allocated memory is always freed.
Here is an example of using `std::auto_ptr` to manage a dynamically allocated integer:
``` c++
#include
std::auto_ptr p(new int(42));
// use the integer
std::cout << *p << std::endl;
// p is automatically deleted when it goes out of scope
```
In this example, we create an `auto_ptr` object called `p` that manages a new integer with the value 42. We then use the `*` operator to dereference `p` and print the value of the integer. When `p` goes out of scope, it is automatically destroyed, which in turn calls `delete` on the managed integer.
`std::auto_ptr` is part of the C++ Standard Library, specifically the `` header. However, it is deprecated in C++11 and later versions in favor of `std::unique_ptr`.
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