BKV_tic_tac_toe

//link https://yadi.sk/d/xZkdriK5gUHufw
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Output.H>
#include <FL/fl_draw.H>
#include <FL/Fl_File_Chooser.H>
#include <iostream>
#include <string>

Fl_Input* inp;
Fl_Button* but[9][9];
Fl_Button* first;
Fl_Window* window2;
Fl_Window* window;
bool b = false;
int K = 0;
int q, w;
int k1 = 1;
const char player1[32] = "Победил игрок 1 (X)";
const char player2[32] = "Победил игрок 2 (O)";
std::string c;
int p;

void recolor(int i, int j, std::string c, int p) {

    but[i][j]->color(FL_RED);
    but[i][j]->redraw();
    if (p == 1) {
        k1 = 1;
        while ((but[i + k1][j]->label()) == c) {

            but[i + k1][j]->color(FL_RED);
            but[i + k1][j]->redraw();

            k1++;
            if (i + k1 > K - 1)
                break;
        }
        k1 = 1;
        while ((but[i - k1][j]->label()) == c) {

            but[i - k1][j]->color(FL_RED);
            but[i - k1][j]->redraw();
            k1++;
            if (i - k1 < 0)
                break;
        }
    }
    else if (p == 2)
    {
        k1 = 1;
        while ((but[i][j + k1]->label()) == c) {

            but[i][j + k1]->color(FL_RED);
            but[i][j + k1]->redraw();

            k1++;
            if (j + k1 > K - 1)
                break;
        }
        k1 = 1;
        while ((but[i][j - k1]->label()) == c) {

            but[i][j - k1]->color(FL_RED);
            but[i][j - k1]->redraw();
            k1++;
            if (j - k1 < 0)
                break;
        }
    }
    else if (p == 3)
    {
        k1 = 1;
        while ((but[i + k1][j + k1]->label()) == c) {

            but[i + k1][j + k1]->color(FL_RED);
            but[i + k1][j + k1]->redraw();

            k1++;
            if (i + k1 > K - 1)
                break;
            if (j + k1 > K - 1)
                break;
        }
        k1 = 1;
        while ((but[i - k1][j - k1]->label()) == c) {

            but[i - k1][j - k1]->color(FL_RED);
            but[i - k1][j - k1]->redraw();
            k1++;
            if (i - k1 < 0)
                break;
            if (j - k1 < 0)
                break;
        }
    }
    else if (p == 4)
    {
        k1 = 1;
        while ((but[i + k1][j - k1]->label()) == c) {

            but[i + k1][j - k1]->color(FL_RED);
            but[i + k1][j - k1]->redraw();

            k1++;
            if (i + k1 > K - 1)
                break;
            if (j - k1 < 0)
                break;
        }
        k1 = 1;
        while ((but[i - k1][j + k1]->label()) == c) {

            but[i - k1][j + k1]->color(FL_RED);
            but[i - k1][j + k1]->redraw();
            k1++;
            if (i - k1 < 0)
                break;
            if (j + k1 > K - 1)
                break;
        }
    }
    if (c == "X")
        fl_alert(player1);
    else
        fl_alert(player2);
    window2->hide();
    exit(0);
}

void
button_callback(Fl_Widget* o, void*)
{
    Fl_Button* button = (Fl_Button*)o;
    if (b == false && button->label() == "") {
        button->label("X");
        b = true;
    }
    else if (b == true && button->label() == "")
    {
        button->label("O");
        b = false;
    }
    for (int i = 0; i < K; i++) {
        for (int j = 0; j < K; j++) {
            if ((i > 0) && (i < K - 1) && ((but[i][j]->label()) == (but[i + 1][j]->label())) && ((but[i][j]->label()) == (but[i - 1][j]->label())) && (but[i][j]->label() != "")) {
                p = 1;
                if (but[i][j]->label() == "X")
                    recolor(i, j, "X", p);
                else
                    recolor(i, j, "O", p);
            }
            if ((j > 0) && (j < K - 1) && ((but[i][j]->label()) == (but[i][j + 1]->label())) && ((but[i][j]->label()) == (but[i][j - 1]->label())) && (but[i][j]->label() != "")) {
                p = 2;
                if (but[i][j]->label() == "X")
                    recolor(i, j, "X", p);
                else
                    recolor(i, j, "O", p);
            }
            if ((j > 0) && (j < K - 1) && (i > 0) && (i < K - 1) && ((but[i][j]->label()) == (but[i + 1][j + 1]->label())) && ((but[i][j]->label()) == (but[i - 1][j - 1]->label())) && (but[i][j]->label() != "")) {
                p = 3;
                if (but[i][j]->label() == "X")
                    recolor(i, j, "X", p);
                else
                    recolor(i, j, "O", p);
            }
            if ((j > 0) && (j < K - 1) && (i > 0) && (i < K - 1) && ((but[i][j]->label()) == (but[i + 1][j - 1]->label())) && ((but[i][j]->label()) == (but[i - 1][j + 1]->label())) && (but[i][j]->label() != "")) {
                p = 4;
                if (but[i][j]->label() == "X")
                    recolor(i, j, "X", p);
                else
                    recolor(i, j, "O", p);
            }

        }
    }

}
void
button_callback2(Fl_Widget* o, void*)
{
    K = atoi(inp->value());
    if (K > 2 && K < 10) {

        window2 = new Fl_Window(50 * K + 100, 50 * K + 100, "Игра 'Крестики-нолики'");
        window2->color(FL_GRAY);
        window->hide();
        window2->begin();
        int n = 0;
        int nn = 0;
        for (int i = 0; i < K; i++) {
            nn = 0;
            n = n + 50;
            for (int j = 0; j < K; j++) {
                nn = nn + 50;
                but[i][j] = new Fl_Button(nn, n, 50, 50, "");
                but[i][j]->labelsize(36);
                but[i][j]->color(FL_WHITE);

            }

        }
        window2->end();
        window2->show();
        for (int v = 0; v < K; v++) {
            for (int m = 0; m < K; m++) {
                but[v][m]->callback(button_callback);
            }
        }
    }
}

int
main()
{
    window = new Fl_Window(300, 100, "Игра 'Крестики-нолики'");
    window->begin();
    first = new Fl_Button(100, 55, 100, 40, "N");
    inp = new Fl_Input(50, 5, 200, 40);
    window->end();
    first->callback(button_callback2);
    window->show();
    return Fl::run();
}