C++:TornadoArray

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <climits>

int main(int argc, char ** argv)
{
    using namespace std;

    int input = 0;

    if (argc >= 2) {
        input = atoi(argv[1]);
    } else {
        cout << "Please enter the number: ";
        cin >> input;
    }
    cout << "Number is " << input << endl;


    int const REPLACE_NUMBER = INT_MAX;
    int const TOTAL_COUNT    = input * input;

    int x = 0, y = 0;

    // ALLOC!
    int ** array = new int* [input];
    for (y = 0; y < input; ++y) {
        array[y] = new int [input];
        for (x = 0; x < input; ++x) {
            array[y][x] = REPLACE_NUMBER;
        }
    }

    int weight_x = 1;
    int weight_y = 0;
    int state    = 0;

    y = 0;
    x = 0;

    // LOGIC!
    for (int insert_number = 1; insert_number <= TOTAL_COUNT; ++insert_number) {
        array[y][x] = insert_number;

        if (/* * */y + weight_y < 0 || y + weight_y >= input
                || x + weight_x < 0 || x + weight_x >= input
                || array[y + weight_y][x + weight_x] != REPLACE_NUMBER) {
            ++state;

            switch (state % 4) {
            case 0: weight_x =  1; weight_y =  0; break;
            case 1: weight_x =  0; weight_y =  1; break;
            case 2: weight_x = -1; weight_y =  0; break;
            case 3: weight_x =  0; weight_y = -1; break;
            }
        }

        y += weight_y;
        x += weight_x;
    }

    // PRINT!
    for (y = 0; y < input; ++y) {
        for (x = 0; x < input; ++x) {
            cout << setw(2) << array[y][x] << ' ';
        }
        cout << endl;
    }

    // RELEASE!
    for (y = 0; y < input; ++y) {
        delete [] array[y];
    }
    delete [] array;

    return 0;
}