Using auto_ptr

Suppose that a function normally allocates memory for an object, uses it, and then deallocates the memory. But if the function exits before reaching the end, either because of a return statement or an exception, it must still not exit without deallocating the memory:

void foo(int n){    my_class* ptr = new my_class;    try {        ptr->process(n); // may throw exception    } catch (...) {        delete ptr;        throw;    }    delete ptr;}

The C++ standard libary provides an automatic pointer type, auto_ptr, which you can use by including . An auto_ptr is constructed using a pointer. You can then use and dereference auto_ptr as if it were a pointer. When an auto_ptr goes out of scope, the destructor frees the memory automatically. The example above may thus be simplified to:

#include void foo(int n){    std::auto_ptr ptr(new my_class);    ptr->process(n);}
Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

technology leadership

Why the World Needs More Technology Leadership

As a fact, technology has touched every single aspect of our lives. And there are some technology giants in today’s world which have been frequently opined to have a strong influence on recent overall technological influence. Moreover, those tech giants have popular technology leaders leading the companies toward achieving greatness.

iOS app development

The Future of iOS App Development: Trends to Watch

When it launched in 2008, the Apple App Store only had 500 apps available. By the first quarter of 2022, the store had about 2.18 million iOS-exclusive apps. Average monthly app releases for the platform reached 34,000 in the first half of 2022, indicating rapid growth in iOS app development.

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job