using System;
using System.Collections.Generic;
using System.Text;

namespace HTEXScan.Models
{

    /**学生id数据**/
    class SidData
    {

        /**col**/
        public int Col
        {
            get;
            set;
        }

        /**值**/
        public char Text
        {
            get;
            set;
        }

    }

    /**学生id**/
    class Sid
    {

        /**max col**/
        private int maxCol = 0;
        /**学生id缓存数据**/
        private List<SidData> datas = new List<SidData>();

        /**添加**/
        public void Add(int col, char text)
        {
            SidData data = new SidData();
            data.Col = col;
            data.Text = text;
            this.datas.Add(data);
            if (col > maxCol)
                maxCol = col;
        }

        /**获取**/
        public List<string> Get()
        {
            List<string> ids = new List<string>();
            char[] dats = new char[maxCol];
            this.GetData(ids, dats, 1);
            return ids;
        }

        /**获取**/
        private void GetData(List<string> ids, char[] dats, int col)
        {
            if(col > this.maxCol)
            {
                ids.Add(new string(dats));
            }
            else
            {
                for(int i = 0;i < this.datas.Count;i++)
                {
                    if (this.datas[i].Col == col)
                    {
                        dats[col - 1] = this.datas[i].Text;
                        this.GetData(ids, dats, col + 1);
                    }
                }
            }
        }

    }

}