void checkSin() {
    cout << "\n\n\n\n\n\n\n\n\n";
    float x;
    HDC hDC = GetDC(GetConsoleWindow());
    HPEN Pen = CreatePen(PS_SOLID, 2, RGB(255, 255, 255));
    SelectObject(hDC, Pen);
    MoveToEx(hDC, 0, 300, NULL);
    LineTo(hDC, 600, 300);
    MoveToEx(hDC, 300, 0, NULL);
    LineTo(hDC, 300, 600);
    #define graphic(x) (sin(x)) //график который будет строится
    //#define graphic(x) ((sqrt(cos(x))*cos(300*x)+sqrt(abs(x))-0.7)*pow((4-x*x),0.01)) //график который будет строится (сердце)

    Pen = CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
    SelectObject(hDC, Pen);
    for (x = -15.0f; x <= 15.0f; x += 0.0001f) // O(300,300) - center
    {
        MoveToEx(hDC, 20 * x + 300, -20 * graphic(x) + 300, NULL);//20 - scale
        LineTo(hDC, 20 * x + 300, -20 * graphic(x) + 300);
    }
}