C++ idiom to avoid memory leaks?

Question

In the following code, there is a memory leak if Info::addPart1() is called multiple times by accident:

typedef struct
{
}part1;

typedef struct
{
}         


        

Answer 1

Option 1: Use Java :)

Option 2: Use auto_ptr

std::auto_ptr _ptr1;
std::auto_ptr _ptr2;

public:
addPart1()
{
   _ptr1 = auto_ptr(new part1);
}

...

// no destructor is needed