请教一个生成序号的规则 请大家帮忙

Question

写一段伪代码，瞧瞧：
for(int i;i<inputnumber;i++)
{
   while(i.length <3)
       i ="0"+ i;
}

Answer 1

select '010-'+convert(varchar,convert(int,max(right(field,3)))+1) from tb where left(field,3)='010'

Answer 2

select right('000'+convert(varchar,10),3)

Answer 3

select right('000'+convert(varchar,99),3)

Answer 4

using System;namespace ConsoleApplication6
{
    class Program
    {
        static string fun(int i)
        {
            string res = i.ToString();
            while (res.Length < 3)
                res = "0" + res;
            return res;        }
        static void Main(string[] args)
        {
            int i = 8;
            Console.WriteLine(fun(i));
        }
    }
}
我写了，你试试吧