Mail Pointer Array

#include <iostream>
using namespace std;

class Mail
{
public:
    Mail() {}
    Mail(int c) { cost = c;}

    int getCost() { return cost; }

private:
    int cost;
};

int main (int argc, const char * argv[])
{
    const int MAX_MAIL = 20;

    // Make an array of MAX_MAIL Mail pointers. The () at the end sets the array
    // elements to 0 (i.e. null pointers). You could always iterate over the
    // pointers and set them to 0 instead.
    Mail **m = new Mail*[MAX_MAIL]();

    // Create MAX_MAIL new Mail items, and assign their pointers to the array.
    for (int i = 0; i < MAX_MAIL; i++)
        m[i] = new Mail(i);

    // Do stuff with the array here........

    // Go through all pointers, delete them if they're not null.
    for (int i = 0; i < MAX_MAIL; i++)
    {
        if (m[i] != 0)
        {
            delete m[i];
            m[i] = 0;
        }
    }

    // Delete the dynamically allocated array. This differs to deleting the
    // individual Mail* array elements.
    delete[] m;

    return 0;
}