get500string.cs

使用viginear,column permutation,DES加密和解密

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

namespace MyCAP
{
    class get500string
    {
        public string gstring()
        {
            int i, tem;
            string str = null;
            for (i = 0; i < 500; i++)
            {
                tem = i;
                if (tem > 25)
                    tem = tem % 26;
                str += (char)('a' + tem);
            }
            return str;
        }
    }
}