c#之根据出生日期获得星座信息

星座定义如下：

代码如下：

    public enum Constellation
    {
        Aquarius = 1,       // 水瓶座 1.20 - 2.18
        Pisces = 2,         // 双鱼座 2.19 - 3.20
        Aries = 3,          // 白羊座 3.21 - 4.19
        Taurus = 4,         // 金牛座 4.20 - 5.20
        Gemini = 5,         // 双子座 5.21 - 6.21
        Cancer = 6,         // 巨蟹座 6.22 - 7.22
        Leo = 7,            // 狮子座 7.23 - 8.22
        Virgo = 8,          // 处女座 8.23 - 9.22
        Libra = 9,          // 天秤座 9.23 - 10.23
        Acrab = 10,         // 天蝎座 10.24 - 11.22
        Sagittarius = 11,   // 射手座 11.23 - 12.21
        Capricornus = 12,   // 摩羯座 12.22 - 1.19
    }

    // 根据出生日期获得星座信息
    public static Constellation GetConstellation(int birthMonth, int birthDate)
    {
        float birthdayF = birthMonth == 1 && birthDate < 20 ?
            13 + birthDate / 100f :
            birthMonth + birthDate / 100f;

        float[] bound = { 1.20F, 2.20F, 3.21F, 4.21F, 5.21F, 6.22F, 7.23F, 8.23F, 9.23F, 10.23F, 11.21F, 12.22F, 13.20F };

        Constellation[] constellations = new Constellation[12];
        for (int i = 0; i < constellations.Length; i++)
            constellations[i] = (Constellation)(i + 1);

        for (int i = 0; i < bound.Length - 1; i++)
        {
            float b = bound[i];
            float nextB = bound[i + 1];
            if (birthdayF >= b && birthdayF < nextB)
                return constellations[i];
        }

        return Constellation.Acrab;
    }