static void Main(string[] args)
{
GetGreeting del = GoodMorning;
UseOperation delegat = Add;
if (DateTime.Now.Hour < 12)
{
del = GoodMorning;
}
else if (DateTime.Now.Hour >= 12 && DateTime.Now.Hour < 18)
{
del = GoodDay;
}
else if (DateTime.Now.Hour >= 18 && DateTime.Now.Hour < 22)
{
del = GoodEvening;
}
else if (DateTime.Now.Hour >= 22 || DateTime.Now.Hour < 11)
{
del = GoodEvening;
}
del();
Console.WriteLine(" Введите числа для расчёта");
Console.Write(" a - ");
int a = Convert.ToInt32(Console.ReadLine());
Console.Write(" b - ");
int b = Convert.ToInt32(Console.ReadLine());
Console.Write(" Какую операцию провернуть (+,-,*,/) - ");
string operacia = Convert.ToString(Console.ReadLine());
if (operacia == "+")
{
delegat = Add;
}
else if (operacia == "-")
{
delegat = Subtract;
}
else if (operacia == "*")
{
delegat = Multiply;
}
else if (operacia == "/")
{
delegat = IntegerDevide;
}
delegat(a, b);
}
static void Main(string[] args)
{
// Task 3
var circle = new Circle();
MyDelegate square = circle.GetCircleSquare;
MyDelegate length = circle.GetCircleLength;
MyDelegate volume = circle.GetSphereVolume;
Console.WriteLine($"Square: {square.Invoke(10)}");
Console.WriteLine($"Length: {length.Invoke(10)}");
Console.WriteLine($"Volume: {volume.Invoke(10)}");
//Task 4
GetGreeting getGreeting = () =>
{
if (DateTime.Now.Hour >= 4 && DateTime.Now.Hour <= 12)
{
GoodMorning();
}
if (DateTime.Now.Hour >= 13 && DateTime.Now.Hour <= 17)
{
GoodDay();
}
if (DateTime.Now.Hour >= 18 && DateTime.Now.Hour <= 21)
{
GoodEvening();
}
if (DateTime.Now.Hour >= 22 && DateTime.Now.Hour <= 3)
{
GoodNight();
}
};
getGreeting.Invoke();
}
public static void SayGreetings()
{
GetGreeting getGreeting = _dictionary.First(item => DateTime.Now.Hour <= item.Key).Value;
getGreeting();
}
