StatisticsDisplayWithEventsAndDelegates.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HeadFirstDesignPatterns.Ch02TheObserverPattern.WeatherStationWithEventsAndDelegates
{
    class StatisticsDisplayWithEventsAndDelegates : IObserverWithEventsAndDelegates, DisplayElementWithEventsAndDelegates
    {
        private float maxTemp = 0.0F;
        private float minTemp = 200;
        private float tempSum = 0.0F;
        private int numReadings;

        public void Update(float temperature, float humidity, float pressure)
        {
            tempSum += temperature;
            numReadings++;

            if (temperature > maxTemp)
            {
                maxTemp = temperature;
            }

            if (temperature < minTemp)
            {
                minTemp = temperature;
            }

            Display();
        }

        public void Display()
        {
            System.Console.WriteLine(String.Format("Avg/Max/Min temperature = {0}/{1}/{2}", (tempSum / numReadings), maxTemp, minTemp));
        }
    }
}