public void TestMeanEvens10Through30()
{
double[] arr = { 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 };
double expected = (double)20;
var calc = new CalculatorLib.Calculator();
double actual = calc.Mean(arr);
Assert.Equal(expected, actual);
}
public void TestMean1Through10()
{
double[] arr = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
double expected = 5.5;
var calc = new CalculatorLib.Calculator();
double actual = calc.Mean(arr);
Assert.Equal(expected, actual);
}
static void Main(string[] args)
{
Console.WriteLine("Looking for CalcInput.txt.");
if (!(File.Exists("CalcInput.txt")))
{//Terminates the program if CalcInput.txt does not exist.
Console.WriteLine("CalcInput.txt could not be found.");
System.Environment.Exit(1);
}
Console.WriteLine("Opening CalcInput.txt and reading in values.");
StreamReader textReader = File.OpenText("CalcInput.txt");
//This program will only read in up to 100 lines
double[] arr = new double[100];
int count = 0;
while (!textReader.EndOfStream)
{
try
{//This try catch block converts each line to a double
arr[count] = Convert.ToDouble(textReader.ReadLine());
}
catch (Exception ex)
{//If the line cannot be converted, the program terminates.
Console.WriteLine($"{ex.GetType()} cannot be converted to a double. Terminating program.");
System.Environment.Exit(1);
}
count++;
}
textReader.Close();
Array.Resize <double>(ref arr, count);
var calc = new CalculatorLib.Calculator();
//Any file called "CalcOutput.txt" will be overwritten by this program.
StreamWriter textWriter = File.CreateText("CalcOutput.txt");
textWriter.WriteLine("The following array of doubles \"arr\" was read in: ");
for (int i = 0; i < arr.Length; i++)
{
textWriter.Write($"{arr[i]}\t");
}
textWriter.WriteLine();
textWriter.WriteLine();
Console.WriteLine("Finding the mean.");
textWriter.WriteLine($"The mean of arr is {Math.Round(calc.Mean(arr),2)}");
textWriter.WriteLine();
Console.WriteLine("Finding the median.");
textWriter.WriteLine($"The median of arr is {calc.Median(arr)}");
textWriter.Close();
Console.WriteLine("Please see CalcOutput.txt for mean and median.");
}