c# programming language

1- You never called determine methods

2- in determine average you used a local variable with the same name of the private field.

3- in lowest, lowest variable is always 0 so it will remain 0 unless you enter a negative value.

here is a quick fix to your code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace ConsoleApplication1
{

    class Temperatures
    {
        public double[] weeksTemperatures;
        public double threshTemp;
        public double average;
        public double averageExcludingLowest;
        public double highest = 5;
        public double lowest;
        public int numOfThreshs = 10;

        public double[] WeeksTemperatures
        {
            get
            {
                return weeksTemperatures;
            }

        }
        public double ThreshTemp
        {
            get
            {
                return threshTemp;
            }
        }
        public double Average
        {
            set
            {
                average = value;
            }

            get
            {
                return average;
            }

        }
        public double AverageExcludingLowest
        {
            set
            {
                averageExcludingLowest = value;
            }

            get
            {
                return averageExcludingLowest;
            }

        }
        public double Highest
        {
            set
            {
                highest = value;
            }

            get
            {
                return highest;
            }

        }
        public double Lowest
        {

            set
            {
                lowest = value;
            }

            get
            {
                return lowest;
            }

        }
        public int NumberOfThreshs
        {
            set
            {
                numOfThreshs = value;
            }

            get
            {
                return numOfThreshs;
            }

        }

        public Temperatures()
        {

        }

        public Temperatures(double[] wTemperatures, double threshT)
        {
            weeksTemperatures = wTemperatures;
            threshTemp = threshT;
            DetermineAverage();
            DetermineAverageExcludingLowest();
            DetermineHighest();
            DetermineLowest();
            DetermineNumberOfThreshs();
        }

        public double DetermineAverage()
        {
            double inaverage = 0;
            for (int x = 0; x < 7; x++) //traverse through the week's temperatures
            {
                inaverage = inaverage + weeksTemperatures[x];    //total up the week's temperatures
            }
            average = inaverage / 7;    //calculate the average temperature
            return inaverage;
        }


        public double DetermineAverageExcludingLowest()
        {
            for (int x = 0; x < 7; x++) //Traverse through the week's temperatures
            {
                averageExcludingLowest = averageExcludingLowest + weeksTemperatures[x];
                if (weeksTemperatures[x] < lowest)   //find the lowest temperature of the week
                {
                    lowest = weeksTemperatures[x];   //and set it to lowest, for use later  
                }
            }
            averageExcludingLowest = ((averageExcludingLowest - lowest) / 7);   // calculate average excluding lowest temperature
            return averageExcludingLowest;
        }


        public double DetermineLowest()
        {
            lowest = highest;
            for (int x = 0; x < 7; x++) //Traverse through the week's temperatures
            {
                if (weeksTemperatures[x] < lowest)   //find the lowest temperature of the week
                {
                    lowest = weeksTemperatures[x];   //and set it to lowest
                }
            }
            return lowest;
        }

        public double DetermineHighest()
        {
            for (int x = 0; x < 7; x++) //Traverse through the week's temperatures
            {
                if (weeksTemperatures[x] > highest)  //find the highest temperature of the week
                {
                    highest = weeksTemperatures[x];  //and set it to highest
                }
            }
            return highest;
        }


        public double DetermineNumberOfThreshs()
        {

            for (int x = 0; x < 7; x++) //Traverse through the week's temperatures
            {

                if (weeksTemperatures[x] < threshTemp)   //find the lowest temperature of the week
                {

                    numOfThreshs++;

                }

            }

            return numOfThreshs;

        }


        public override string ToString()
        {

            return "=====================\nWeekly Statistics\n" + "---------------------\n" + "Average Temperature: " + average + "\nHighest Temperature: "

            + highest + "\nLowest Temperature: " + lowest + "\nAvg. Excl. Lowest: " + averageExcludingLowest + "\n# of Cold Days: " + numOfThreshs + "\n====================="; //Formats and the invoice to be printed

        }

    }

}

---

Please remember to 'Mark as Answer' the responses that resolved your issue. It is a common way to recognize those who have helped you, and makes it easier for other visitors to find the resolution later.