static void Main(string[] args)
{
Console.WriteLine("Enter an array of integers:");
string ints_string = Console.ReadLine();
string[] ints_string_array = ints_string.Split(new string[] { " ", ",", ", " },
StringSplitOptions.RemoveEmptyEntries);
var ints_array = new int[ints_string_array.Length];
for (var i = 0; i < ints_string_array.Length; i++)
{
ints_array[i] = Convert.ToInt32(ints_string_array[i]);
}
Console.WriteLine("Enter 'evens' or 'odds':");
string filter = Console.ReadLine().ToLower();
Console.WriteLine("Enter 'sum', 'max' or 'avg':");
string action = Console.ReadLine().ToLower();
MathClass.Del_1 del_filter = null;
if (filter == "evens")
{
del_filter = MathClass.Evens;
}
else if (filter == "odds")
{
del_filter = MathClass.Odds;
}
else
{
Console.WriteLine("You entered invalid filter. It should be either 'evens' or 'odds'." +
"Given array was not filtered.");
}
MathClass.Del_2 del_action = null;
if (action == "sum")
{
del_action = MathClass.Sum_;
}
else if (action == "max")
{
del_action = MathClass.Max_;
}
else if (action == "avg")
{
del_action = MathClass.Avg_;
}
else
{
Console.WriteLine("You entered invalid action. It should be either 'sum', 'max' or 'avg'.");
}
Output(del_filter, del_action, ints_array);
Console.ReadKey();
}
public static void Output(MathClass.Del_1 del_1, MathClass.Del_2 del_2, int[] arr)
{
int?result = del_2?.Invoke(del_1, arr);
Console.WriteLine(result);
}