一个产生中文累计数的代码片断

为了业务的需要无聊之极的写了一个输出中文数字的方法，效率上勉强过得去，如果你有什么更好的方法，跟贴吧。

1
2        /**//// <summary>
3        /// 中文计数
4        /// </summary>
5        /// <param name="num">[1 - 99999]</param>
6        /// <returns></returns>
7        public static string numtochinesenumstr(int num)
8        {
9            if(num <= 0 num > 99999)
10                throw new argumentexception("num");
11            string[] gradechar = new string[]{"","十","百","千","万"};
12            string[] digitchar = new string[]{"一","二","三","四","五","六","七","八","九"};
13            char zero = 零;
14
15            int length = (int) math.log10(num) + 1;
16            stringbuilder output = new stringbuilder(length);
17            int[] input = new int[length];
18            int index = -1;
19            while(++index != length)
20            {
21                input[index] = (num / (length - index == 1? 1 : (int)math.pow(10, length -index -1))) % 10;
22            }
23
24            bool needfix = false;
25            if(input.length == 2 && input[0] == 1)
26                needfix = true;
27
28            for(int pos = 0; pos < input.length; pos ++)
29            {
30                if(input[pos] == 0)
31                {
32                    if(output[output.length -1] != zero)
33                        output.append(zero);
34                    continue;
35                }
36                else if(!(pos == 0 && needfix))
37                {
38                    output.append(digitchar[input[pos] -1]);
39                }
40                output.append(gradechar[input.length - pos -1]);
41            }
42            if(output[output.length - 1] == zero)
43                output.remove(output.length - 1, 1);
44            return output.tostring();
45        }
46

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