auto_ptr.cpp

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#include <iostream>   // for cout, endl
#include <memory>     // for auto_ptr
 
#include <examples.h>
 
 
// A simple structure.
class X
{
    int i_;
 
public:
 
    X (int i) : i_ (i) {
        std::cout << "X::X (" << i_ << ')' << std::endl;
    }
 
    ~X () {
        std::cout << "X::~X [" << i_ << ']' << std::endl;
    }
 
    int get () const { return i_; }
};
 
 
int main ()
{
    // a implicitly initialized to 0 (the null pointer)
    std::auto_ptr<X> a;
 
    // Establish a scope.
    if (1) {
        // b will hold a pointer to an X.
        std::auto_ptr<X> b (new X (12345));
 
        // a will now be the owner of the underlying pointer.
        a = b;
    }
 
    std::cout << "b destroyed" << std::endl;
 
        // Output the value contained by the underlying pointer.
#ifndef _RWSTD_NO_NONCLASS_ARROW_RETURN
        std::cout << a->get () << std::endl;
#else
        std::cout << (*a).get () << std::endl;
#endif
 
    // The pointer will be delete'd when a is destroyed on leaving scope.
    return 0;
}