Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Task - Defining Delegates | Interactive GUI
Advanced C# with .NET

Task - Defining DelegatesTask - Defining Delegates

You can download the base code by cloning the Github Repository.

Your task is to define a delegate type called Operation, which can refer to the methods that have the same signature as the max and avg methods.

Currently there is no delegate definition so the program doesn't compile, however after defining the delegate type you should be able to successfully compile and run the program, indicating that your solution is correct.
Use the syntax delegate <return type> <type name> <parameter list> to define the delegate type. 

using System.ComponentModel.DataAnnotations;

namespace DelegateIntro
{
    internal class Program
    {
        // Write code below this line
        delegate float Operation(int[] nums);
        // Write code above this line

        static void Main(string[] args)
        {
            int[] nums = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            Console.WriteLine(arrayMethod(max, nums));
            Console.WriteLine(arrayMethod(avg, nums));
        }

        static float arrayMethod(Operation opr, int[] nums)
        {
            return opr(nums);
        }
        
        static int max(int[] nums)
        {
            int max = nums[0];
            for(int i = 1; i < nums.Length; i++)
                if (max < nums[i])
                    max = nums[i];
            return max;
        }

        static float avg(int[] nums)
        {
            float sum = 0;
            for(int i = 0; i < nums.Length; i++)
                sum += nums[i];
            return sum / nums.Length;
        }
    }
}

Все було зрозуміло?

Секція 2. Розділ 2
course content

Зміст курсу

Advanced C# with .NET

1. Introduction to Desktop Development with .NET

What is .NET MAUI?Setting up a MAUI ProjectUnderstanding the Structure of a MAUI ProjectUnderstanding XAML and Adding ElementsTask - Adding Elements in a MAUI Application

2. Interactive GUI

DelegatesTask - Defining DelegatesEventsTask - Binding Event Handlers to EventsCustom EventsTask - Creating a Custom EventData BindingTask - Practicing Data Binding

3. Threading

What is Threading?Creating and Using ThreadsTask - Preventing Program Freezes Using ThreadingAsynchronous Programming vs ThreadingThe lock Statement

4. Generics & Reflection

What are Generics?Implementing Generic MethodsTask - Implementing a Generic MethodImplementing Generic ClassesTask - Implementing a Generic ClassIntroduction to ReflectionBasic ReflectionTask - ReflectionWhat's Next?

Advanced C# with .NET

Task - Defining DelegatesTask - Defining Delegates

You can download the base code by cloning the Github Repository.

Your task is to define a delegate type called Operation, which can refer to the methods that have the same signature as the max and avg methods.

Currently there is no delegate definition so the program doesn't compile, however after defining the delegate type you should be able to successfully compile and run the program, indicating that your solution is correct.
Use the syntax delegate <return type> <type name> <parameter list> to define the delegate type. 

using System.ComponentModel.DataAnnotations;

namespace DelegateIntro
{
    internal class Program
    {
        // Write code below this line
        delegate float Operation(int[] nums);
        // Write code above this line

        static void Main(string[] args)
        {
            int[] nums = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            Console.WriteLine(arrayMethod(max, nums));
            Console.WriteLine(arrayMethod(avg, nums));
        }

        static float arrayMethod(Operation opr, int[] nums)
        {
            return opr(nums);
        }
        
        static int max(int[] nums)
        {
            int max = nums[0];
            for(int i = 1; i < nums.Length; i++)
                if (max < nums[i])
                    max = nums[i];
            return max;
        }

        static float avg(int[] nums)
        {
            float sum = 0;
            for(int i = 0; i < nums.Length; i++)
                sum += nums[i];
            return sum / nums.Length;
        }
    }
}

Все було зрозуміло?

Секція 2. Розділ 2
some-alt