How to create a method that return the average for 5 doubles !!

ahmed sami

14y2.2kVisual Basic .NET

4 Replies

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Vulpes14y ago
Accepted answer
Try this.

As you may not have learned LINQ yet, I've used 'traditional' code to work out the average:

using System;

class Program
{
static void Main()
{
double[] numbers = new double[5];
Console.WriteLine("Please enter 5 doubles\n");
for(int i = 0; i < 5; i++)
{
while(true)
{
Console.Write("Double {0} : ", i + 1);
bool isValid = double.TryParse(Console.ReadLine(), out numbers[i]);
if (isValid) break;
Console.WriteLine("Not a valid double, please re-enter");
}
}

Console.WriteLine("\nThe average of these numbers is {0}", Average(numbers));
Console.ReadKey();
}

static double Average(double[] numbers)
{
if (numbers == null || numbers.Length == 0)
throw new ArgumentException("Array is null or empty");

double total = 0;
foreach(double number in numbers) total += number;
return total/numbers.Length;
}
}
ahmed sami14y ago
thank you sooooo much !!
you are amazing !!
ahmed sami14y ago
mmmmmmmmm .. i need the code that allow the user to input those 5 numbers !!!
Shen Hengbin14y ago
you can easily use LINQ to implement it. like below ?

    class Program
    {
        static void Main(string[] args) {

            var values = new double[] { 1,2,3,4,5 };
            Console.WriteLine(Average(values));
            Console.Read();
        }

        static double Average(double[] values) {

            if (values == null || values.Length == 0)
                throw new ArgumentException("Parameter is null or empty");

            return values.Average();
        }
    }