static void Main(string[] args)
{
//Goi ham delegate
ShowLog showLog;
showLog = Info; //showLog gan bang phuong thuc Info
showLog("Sung Mi No"); //Thi hanh delegate chinh la thi hanh Info
showLog = Warning; //showLog gan bang phuong thuc Warning
showLog("Lop CNTT2.01-K61");
//Gan 1 phuong thuc Anonymou(nac danh) cho delegate
showLog += (x) => { Console.WriteLine(string.Format("===>{0}<===", x)); };
showLog("Le Dinh Duc");
//Goi ham chua tham so delegate
TinhTog(13, 34, Info);
TinhTog(184, 23, Warning);
//--------------------------------------------------------
//Demo 1
int num1 = 0;
int num2 = 0;
Console.WriteLine("Console demo in C#\r");
Console.WriteLine("---------------------\n");
Console.WriteLine("Type a number, and then press Enter");
num1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Type another number, and then press Enter");
num2 = Convert.ToInt32(Console.ReadLine());
//Ask the User to choose an option
Console.WriteLine("Choose an option from the following list:");
Console.WriteLine("\ta - Add ");
Console.WriteLine("\ts - Subtrack");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.WriteLine("Your option? ");
//use a switch statement to do the part. Su dung 1 cau lenh de chuyen doi toan
switch (Console.ReadLine())
{
case "a":
Console.WriteLine($"Your result: {num1} + {num2} = " + (num1 + num2));
break;
case "s":
Console.WriteLine($"Your result: {num1} - {num2} = " + (num1 - num2));
break;
case "m":
Console.WriteLine($"Your result: {num1} * {num2} = " + (num1 * num2));
break;
case "d":
Console.WriteLine($"Your result: {num1} / {num2} = " + (num1 / num2));
break;
}
//wait for the user to respond befor closing. cho nguoi dung phan hoi truoc khi dong
Console.WriteLine("Next demo 2...........................................");
//----------------------------------------------------------------------
//Demo 2
//Nhap du lieu
string userLogin;
Console.Write("Nhap username: "******"Ten nhap vao la: {userLogin}");
Console.WriteLine("Ten nhap vao la: " + userLogin);
Console.Write("Nhap mot so thuc: ");
//Nhap chuoi va chuyen chuoi do thanh so thuc
double dinput = Convert.ToDouble(Console.ReadLine());
Console.WriteLine($"So da nhap la: {dinput}");
Console.WriteLine("Next demo 3...................");
//------------------------------------------------------------------
//Demo 3
Console.WriteLine("Demo 3...");
double bq = NamBK(5); //Goi ham
Console.WriteLine("Binh phuong cua 5 la: " + bq);
//Goi phuong thuc cung namespace va de public
Demo.Hello();
var max = Demo.Max(23494774, 844729282);
Console.WriteLine(max);
long thetich = Demo.TheTich(33);
Console.WriteLine(thetich);
//Dong chuong trinh
Console.Write("Press any key to end demo...");
Console.ReadKey();
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Console.ReadKey();
Demo.Hello("Mr");
}