C / C++ / MFC

#include <iostream>
 
using namespace std;
 
void main()
{
    int *pointer = NULL; // pointer to the array
    int size = 0;        // the number of elements in the array
    int nextindex = 0;   // the next available empty index
    int growby = 10;     // the number of elements to add to our array
                         // the bigger this number, the less reallocations
                         // we have to make.
 
    int number = 0;      
    cin >> number;
    while (number > 0)   // zero or negative number ends loop
    {
        if (nextindex >= size)
        {
            // array full, make it bigger
            cout << "Allocating more memory" << endl;
            int *newpointer = new int[size + growby];
            memset (newpointer, 0, (size + growby) * sizeof(newpointer[0]));
            memmove (newpointer, pointer, size * sizeof(pointer[0]));
            delete[] pointer;
            pointer = newpointer;
            size += growby;
        }
 
        pointer[nextindex++] = number;
 
        cin >> number;
    }
 
    for (int count = 0; count < nextindex; ++count)
    {
        cout << pointer[count] << endl;
    }
 
    delete[] pointer;  // cleanup
}