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C++ Primer Plus, Fourth Edition
book

C++ Primer Plus, Fourth Edition

by Stephen Prata
November 2001
Beginner content levelBeginner
1128 pages
29h 12m
English
Sams
Content preview from C++ Primer Plus, Fourth Edition

The auto_ptr Class

The auto_ptr class is a template class for managing the use of dynamic memory allocation. Let's take a look at what might be needed and how it can be accomplished. Consider the following function:

void remodel(string & str)
{
    string * ps = new string(str);
    ...
    str = ps;
    return;
}

You probably see its flaw. Each time the function is called, it allocates memory from the heap but never returns it, creating a memory leak. You also know the solution—just remember to free the allocated memory by adding the following statement just before the return statement:

delete ps;

However, a solution involving the phrase “just remember to” seldom is the best solution. Sometimes you won't remember. Or you will remember but accidentally remove ...

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Publisher Resources

ISBN: 0672322234Purchase book