十进制正整数转换成六十二进制

C# code

/// <summary>/// 十进制正整数转换成六十二进制/// </summary>/// <param name="Number">需要转换的数字Int64格式，不能为负数</param>/// <param name="toBase">转换基数，必须是2至62以内</param>/// <returns>自定义的进制字符串</returns>public static String toDectoStr62(Int64 Number, Int32 toBase){    String str62 = "", Digits62 = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";    Int64 result = Number;    if (Number > 0)    {        while (result > 0)        {            Int32 val = toInt32(result % toBase);            str62 = String.Format("{0}{1}", Digits62[val], str62);            result = (Int64)(result / toBase);        }        return str62;    }    return "0";}/// <summary>/// 六十二进制转换成十进制正整数/// </summary>/// <param name="str62">自定义的进制字符串</param>/// <param name="toBase">转换基数，必须是2至62以内</param>/// <returns>返回Int64</returns>public static Int64 toDectoStr62(String str62, Int32 toBase){    String Digits62 = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";    int length = str62.Length;    Int64 result = 0;    for (int i = 0; i < length; i++)    {        Int64 val = (Int64)Math.Pow(toBase, (length - i - 1));        Int64 tmp = Digits62.IndexOf(str62[i]);        result += tmp * val;    }    return result;}