Game of Life(in dev...)

#include <iostream>
#include <conio.h>
#include <windows.h>

using namespace std;

class map {
public:
    int size;
    char **map_line;
    int gen_i;
    int n_alive;

    char** createMap(int size_t) {
        char **map_t = new char* [size_t];
        for (int i = 0; i < size_t; i++)
            map_t[i] = new char[size_t];
        return map_t;
    }

    map() {
        gen_i = 1;
        n_alive = 0;
        cout << "-->> Game of Life <<--\n";
        cout << "Enter size of the Universe -> ";
        cin >> size;
        size += 2;
        map_line = createMap(size);

        for (int i = 0; i < size; i++)
            for (int j = 0; j < size; j++)
                map_line[i][j] = ' ';

        for (int i = 0; i < size; i++)
            map_line[0][i] = '.';
        for (int i = 0; i < size; i++)
            map_line[i][size - 1] = '.';
        for (int i = 0; i < size; i++)
            map_line[size - 1][size - 1 - i] = '.';
        for (int i = 0; i < size; i++)
            map_line[size - 1 - i][0] = '.';
    }

    void print() {
        system("cls");
        cout << "-->> Game of Life <<--\n";
        cout << "Generation: " << gen_i << endl;
        cout << "Number of alive cells: " << n_alive << endl;
        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++)
                cout << map_line[i][j];
            cout << endl;
        }
    }

    bool input() {
        int x, y;
        print();
        cout << "The arrangement of alive cells\n";
        cout << "Enter [0] to complete.\n";
        cout << "Enter the coordinates in the format [x, y] -> ";
        cin >> x;
        if (x == 0)
            return 1;
        cin >> y;
        if (x < 1 || x > size - 2 || y < 1 || y > size - 2)
            return 0;
        y = size - 1 - y;
        if (map_line[y][x] == '*')
            return 0;
        map_line[y][x] = '*';
        n_alive++;
        return 0;
    }

    int neighbors(char q, int i, int j) {
        int tmp_i = 0;
        if (map_line[i + 1][j] == q)
            tmp_i++;
        if (map_line[i + 1][j + 1] == q)
            tmp_i++;
        if (map_line[i][j + 1] == q)
            tmp_i++;
        if (map_line[i - 1][j + 1] == q)
            tmp_i++;
        if (map_line[i - 1][j] == q)
            tmp_i++;
        if (map_line[i - 1][j - 1] == q)
            tmp_i++;
        if (map_line[i][j - 1] == q)
            tmp_i++;
        if (map_line[i + 1][j - 1] == q)
            tmp_i++;
        return tmp_i;
    }

    bool run() {
        gen_i++;
        bool f_b = 1;

        char** tmp_map_line = createMap(size);

        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++) {
                if (map_line[i][j] == '.')
                    tmp_map_line[i][j] = '.';
                else if (map_line[i][j] == ' ') {
                    if (neighbors('*', i, j) == 3) {
                        tmp_map_line[i][j] = '*';
                        n_alive++;
                    } else
                        tmp_map_line[i][j] = ' ';
                } else {
                    if (neighbors('*', i, j) > 3 || neighbors('*', i, j) < 2) {
                        tmp_map_line[i][j] = ' ';
                        n_alive--;
                    } else
                        tmp_map_line[i][j] = '*';
                }
            }
        }
        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++) {
                if (map_line[i][j] != tmp_map_line[i][j])
                    f_b = 0;
                map_line[i][j] = tmp_map_line[i][j];
            }
        }
        return f_b;
    }

};

int main() {
    map map1;
    map1.print();

    while (1){
        if (map1.input() == 0)
            continue;
        else
            break;
    }

    cout << "Start the game [Y]/[N] ? ";
    char tmp;
    cin >> tmp;
    if (tmp == 'N')
        return 0;
    while (1) {
        if (map1.run() == 0) {
        map1.print();
        Sleep(300);
        }
        else
            break;
    }
    cout << "\nThe End.\n";

    return 0;
}