public static void Main()
{
Random2 rnd = new Random2();
Byte[] bytes = new Byte[10000];
int[] total = new int[101];
rnd.NextBytes(bytes, 0, 101);
// Calculate how many of each value we have.
foreach (var value in bytes)
{
total[value]++;
}
// Display the results.
for (int ctr = 0; ctr < total.Length; ctr++)
{
Console.Write("{0,3}: {1,-3} ", ctr, total[ctr]);
if ((ctr + 1) % 5 == 0)
{
Console.WriteLine();
}
}
}
static void Main(string[] args)
{
string a = "abcdefghijklmnopqrstuvwsyz123456789";
//string s = " Hello, World! ";
//string t;
//Console.WriteLine(s.Length);//14
//Console.WriteLine(s[8]); //" "
//Console.WriteLine(s.Insert(8, "C# "));//" Hello, C#World! "
//Console.WriteLine(s.PadLeft(20, '.'));".... //"
//Console.WriteLine(s.PadRight(20, '.'));"// ..."
//Console.WriteLine(s.Remove(6));" Hell"
//Console.WriteLine(s.Remove(6, 7));" Hellld! "
//Console.WriteLine(s.Replace('l', 'm'));
//Console.WriteLine(s.ToLower());
//Console.WriteLine(s.ToUpper());
//Console.WriteLine('/' + s.Trim() + '/');
//Console.WriteLine('/' + s.TrimStart() + '/');
//Console.WriteLine('/' + s.TrimEnd() + '/');
//string[] a = s.Split(',');
//foreach (var i in a)
// Console.WriteLine('/' + i + '/');
//char[] destination = new char[10];
//s.CopyTo(8, destination, 0, 6);
//Console.WriteLine(destination);
//Console.WriteLine('/' + s.Substring(8) + '/');
//Console.WriteLine('/' + s.Substring(8, 5) + '/');
//Console.WriteLine(s.Contains("ll"));
//Console.WriteLine(s.IndexOf('o'));
//Console.WriteLine(s.LastIndexOf('o'));
//Console.WriteLine(s.CompareTo("abc"));
//Console.WriteLine(String.Concat("Hi~", s));
//Console.WriteLine(String.Compare("abc", s));
//Console.WriteLine(t = String.Copy(s));
//String[] val = { "apple", "orange", "grape", "pear" };
//String result = String.Join(", ", val);
//Console.WriteLine(result);
DateTime date = DateTime.Now;
Console.WriteLine(date.ToString("yyyyMMdd00005"));
//문제1 주문번호 : yyyyMMdd일련번호5자리 (2020092900005) 를 출력하시오.
//문제2 입력받은 아이디가 6자리 이상인지 체크하시오.
FileInfo fileInfo = new FileInfo(date.ToString("yyyyMMddHHmmss"));
Console.WriteLine(date.ToString("yyyyMMddHHmmss"));
Console.WriteLine(fileInfo.Directory);
Random2 random = new Random2(DateTime.Now.Millisecond);
byte[] result1 = new byte[3];
random.NextBytes(result1, 48, 90);
string result2 = Encoding.UTF8.GetString(result1);
Console.WriteLine(result2);
//fileInfo.Create();
//문제3 파일명 : yyyyMMddHHmmss + 랜덤3자리(영문대문자 + 숫자)
}