how to find average with strings c#-CodePudding

I need to set a variable as the average of 3 other variables, which are numbers but they are set as strings. How do I do this? I'm using c#, visual studio, windows forms.

The variable i'm trying to set is called skiTime, the variables i'm using to get the average are called skiTime1, skiTime2 and skiTime3.

basically i need the c# version of: skiTime = (skiTime1 skiTime2 skiTime3) / 3

The code where I start (declare? I don't know the word to use) the variables

    List<string> skiTime1 = new List<string>();
    List<string> skiTime2 = new List<string>();
    List<string> skiTime3 = new List<string>();
    string skiTime

The code where i set the value for the variables:

            using (StreamReader sr = new StreamReader("pupilSkiTimes.txt"))
        {

            string line = "";
            while ((line = sr.ReadLine()) != null)
            {
                string[] components = line.Split("~".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                skiTime1.Add(components[2]);
                skiTime2.Add(components[3]);
                skiTime3.Add(components[4]);
            }
            sr.Close();
        }

I need to display skiTime1, skiTime2 and skiTime3 in a data grid view, so i think they need to be strings, if i'm not mistaken. skiTime will only be used in another calculation so maybe it can be turned into an int. I don't really know what i'm doing and only got this far because of tutorials, help.

I can post the whole code if this question is too confusing or doesn't have enough information.

CodePudding user response：

You need to parse the strings to decimals then calculate the average:

List<decimal> avgTime = new List<decimal>();
for (var i = 0; i < skiTime1.Length; i  ) {
  var avg = (decimal.Parse(skiTime1[i])   decimal.Parse(skiTime2[i])   decimal.Parse(skiTime3[i])) / 3;
  avgTime.Add(avg);
}

CodePudding user response：

    public string CalculateAverage(List<string> skiTime1, List<string> skiTime2, List<string> skiTime3)
    {
        List<string> allValues = new List<string>();
        allValues.AddRange(skiTime1);
        allValues.AddRange(skiTime2);
        allValues.AddRange(skiTime3);
        int totalcount = 0;
        int average = 0;

        foreach(var value in allValues)
        {
            totalcount = totalcount   int.Parse(value);
        }

        average = totalcount / allValues.Count();
        return average.ToString();
    }

Function for returning the average value