#include <iostream>
using namespace std;

class IntegerDynamicArray
{
    public:
        IntegerDynamicArray()
        {
            currentSize = 0;
            maxSize = 10;
            dynamicArray = new int[maxSize];
        }

        int add(int x);
        bool remove(int x);
    private:
        int* dynamicArray;
        int currentSize;
        int maxSize;
};

int IntegerDynamicArray::add(int x)
{
    if (currentSize == maxSize)
    {
        maxSize = maxSize * 2;
        int* tempArray = new int[maxSize];
        for (int i = 0; i < currentSize; i++)
        {
            tempArray[i] = dynamicArray[i];
        }
        tempArray[currentSize] = x;
        currentSize++;
        dynamicArray = tempArray;
    }
    else
    {
        dynamicArray[currentSize] = x;
        currentSize++;
    }
    return currentSize;
}

bool IntegerDynamicArray::remove(int x)
{
    for (int i = 0; i < currentSize; i++)
    {
        if (dynamicArray[i] == x)
        {
            //TODO need to delete the number and move all numbers "back" by one
            return true;
        }
    }
    return false;
}

int main()
{
    IntegerDynamicArray intDynArray;
    while (1)
    {
        char input;
        cout << "Enter A for add or R for remove: ";
        cin >> input;
        if (input == 'A')
        {
            cout << "Enter number to add: ";
            int x;
            cin >> x;
            cout << intDynArray.add(x) << endl;
        }
        else if (input == 'R')
        {
            cout << "Enter number to remove: ";
            int x;
            cin >> x;
            cout << intDynArray.remove(x) << endl;
        }
    }
}

bool IntegerDynamicArray::remove(int x)
{
    for (int i = 0; i < currentSize; i++)
    {
        if (dynamicArray[i] == x)
        {
            for ( ; i < currentSize - 1; i++)
            {
                // Assign the next element to current location.
                dynamicArray[i] = dynamicArray[i + 1];
            }

            // Remove the last element as it has been moved to previous index.
            dynamicArray[currentSize - 1] = 0;
            currentSize = currentSize - 1;

            return true;
        }
    }
    return false;
}

bool IntegerDynamicArray::remove(int x)
{
    for (int i = 0; i < currentSize; i++)
    {
        if (dynamicArray[i] == x)
        {
            int *newArray = new int[currentSize-1];
            std::copy(dynamicArray, dynamicArray+i, newArray);
            std::copy(dynamicArray+i+1, dynamicArray+currentSize, newArray+i);
            delete[] dynamicArray;
            dynamicArray = newArray;
            --currentSize;
            return true;
        }
    }
    return false;
}