struct s_stat
{
    float base;
    float increased;
    float more;
};

func s_stat make_stat()
{
    s_stat stat;
    stat.base = 0;
    stat.increased = 0;
    stat.more = 1;
    return stat;
}

func float calculate_stat(s_stat stat)
{
    float inc = (1 + stat.increased / 100);
    return stat.base * inc * stat.more;
}

func s_stat operator+(s_stat a, s_stat b)
{
    s_stat result = make_stat();
    result.base = a.base + b.base;
    result.increased = a.increased + b.increased;
    result.more = a.more * b.more;
    return result;
}