Spiral numbers

#include <iostream>
#include <iomanip>
#include <algorithm>

using namespace std;

int x_ge_y(const int x, const int y)
{
        return abs(abs(x - y) - 1 - abs(y - x - 1)) / 2;
}

int x_lt_y(const int x, const int y)
{
        return 1 - x_ge_y(x, y);
}

int get_value(const int size, const int x, const int y)
{
        const int x_centric = x - (size - 1) / 2;
        const int y_centric = y - (size - 1) / 2;

        const int current_subsquare_half = max(abs(x_centric), abs(y_centric));
        const int current_subsquare = current_subsquare_half * 2 + 1;

        const int x_local = x_centric + current_subsquare_half;
        const int y_local = y_centric + current_subsquare_half;

        const int top_right_value = x_ge_y(x_local, y_local) * (x_local + y_local);
        const int bottom_left_value = x_lt_y(x_local, y_local) * (2 * (current_subsquare - 1) + ((current_subsquare - 1) - x_local) + ((current_subsquare - 1) - y_local));

        const int inverted_value_local = top_right_value + bottom_left_value;
        const int inverted_value = current_subsquare * current_subsquare - 1 - inverted_value_local;

        return size * size - inverted_value;
}

int main()
{
        cout << "------" << endl;

        const int size = 9;

        for (int i = 0; i < size; ++i)
        {
                for (int j = 0; j < size; ++j)
                {
                        cout << setw(3) << get_value(size, j, i);
                };
                cout << endl;
        };

        cout << "------" << endl;
        return 0;
}