public static object Average <T>(this List <T> list, delDouble <T> action)
{
double avg = 0;
foreach (var item in list)
{
avg = avg + action(item);
}
return(avg / list.Count);
}
static void Main(string[] args)
{
//A)
delV dV = new delV(MathFunc.DelegateVoid);
dV.Invoke();
//B)
delF dF = new delF(MathFunc.DelegateFloat);
dF.Invoke();
//C)
delP dP = new delP(MathFunc.DelegateParam);
dP.Invoke(1, 2, 3);
//Math
//Int
delInt dIntAdd = MathFunc.DelegateAdd;
delInt dIntSub = MathFunc.DelegateSub;
delInt dIntMulti = MathFunc.DelegateMulti;
delInt dIntDiv = MathFunc.DelegateDiv;
delInt dIntSec = MathFunc.DelegateSecond;
delIntS dIntSecS = MathFunc.DelegateSecond;
//Float
delFloat dFloatAdd = MathFunc.DelegateAdd;
delFloat dFloatSub = MathFunc.DelegateSub;
delFloat dFloatMulti = MathFunc.DelegateMulti;
delFloat dFloatDiv = MathFunc.DelegateDiv;
delFloat dFloatSec = MathFunc.DelegateSecond;
delFloatS dFloatSecS = MathFunc.DelegateSecond;
//String
delString dStringAdd = MathFunc.DelegateAdd;
delString dStringSub = MathFunc.DelegateSub;
delString dStringMulti = MathFunc.DelegateMulti;
delString dStringDiv = MathFunc.DelegateDiv;
delString dStringSec = MathFunc.DelegateSecond;
delStringS dStringSecS = MathFunc.DelegateSecond;
//A little program
Error ERROR = new Error();
Console.WriteLine("A little program...");
Console.WriteLine("");
Console.WriteLine("Type your calculation, and then press Enter for result");
Console.WriteLine("c clears the screen:");
Console.WriteLine("h For a list of commands:");
Console.WriteLine("");
bool on = true;
while (on)
{
try
{
string x = Console.ReadLine();
//Just for the practice
if ((x.Contains('+') || x.Contains('-') || x.Contains('/') || x.Contains('*') || x.Contains('^') || x.Contains('_')) && (x.Contains('+') || x.Contains('-') || x.Contains('/') || x.Contains('*') || x.Contains('^') || x.Contains('_')))
{
advancedmath advancedmath = (y) => Convert.ToDouble(y);
if (x.Contains('|'))
{
string results = "";
string[] moremath = x.Trim().Split('|');
foreach (var item in moremath)
{
string calculation = Regex.Replace(item, @"[^0-9.+*^/_-]+", "");
if (calculation.StartsWith('+') || calculation.StartsWith('-') || calculation.StartsWith('/') || calculation.StartsWith('*') || calculation.StartsWith('^') || calculation.StartsWith('_'))
{
string subcalculation = Regex.Replace(calculation, @"[^0-9.]+", "");
string subresult = Convert.ToString(advancedmath.Invoke(new DataTable().Compute(subcalculation, null)));
string property = Regex.Replace(calculation, @"[^+*^/_-]+", "");
property += subresult;
results += property;
}
else
{
string result = Convert.ToString(advancedmath.Invoke(new DataTable().Compute(calculation, null)));
results += result;
}
}
Console.WriteLine(results);
Console.WriteLine(advancedmath.Invoke(new DataTable().Compute(results, null)));
}
else
{
string numberandsymbols = Regex.Replace(x, @"[^0-9.+*^/_-]+", "");
Console.WriteLine(advancedmath.Invoke(new DataTable().Compute(numberandsymbols, null)));
}
}
//add
else if (x.Contains('+'))
{
string[] y = x.Split('+');
string first = y[0];
string second = y[1];
try
{
int answer = dIntAdd.Invoke(Convert.ToInt32(first), Convert.ToInt32(second));
Console.WriteLine(answer);
}
catch (Exception)
{
try
{
float answer = dFloatAdd(Convert.ToSingle(first), Convert.ToSingle(second));
Console.WriteLine(answer);
}
catch (Exception)
{
int answer = dStringAdd.Invoke(first, second);
Console.WriteLine(answer);
}
}
}
//subtract
else if (x.Contains('-'))
{
string[] y = x.Split('-');
string first = y[0];
string second = y[1];
try
{
int answer = dIntSub.Invoke(Convert.ToInt32(first), Convert.ToInt32(second));
Console.WriteLine(answer);
}
catch (Exception)
{
try
{
float answer = dFloatSub(Convert.ToSingle(first), Convert.ToSingle(second));
Console.WriteLine(answer);
}
catch (Exception)
{
int answer = dStringSub.Invoke(first, second);
Console.WriteLine(answer);
}
}
}
//divide
else if (x.Contains('/'))
{
string[] y = x.Split('/');
string first = y[0];
string second = y[1];
try
{
int answer = dIntDiv.Invoke(Convert.ToInt32(first), Convert.ToInt32(second));
Console.WriteLine(answer);
}
catch (Exception)
{
try
{
float answer = dFloatDiv(Convert.ToSingle(first), Convert.ToSingle(second));
Console.WriteLine(answer);
}
catch (Exception)
{
int answer = dStringDiv.Invoke(first, second);
Console.WriteLine(answer);
}
}
}
//multiply
else if (x.Contains('*'))
{
string[] y = x.Split('*');
string first = y[0];
string second = y[1];
try
{
int answer = dIntMulti.Invoke(Convert.ToInt32(first), Convert.ToInt32(second));
Console.WriteLine(answer);
}
catch (Exception)
{
float answer = dFloatMulti(Convert.ToSingle(first), Convert.ToSingle(second));
Console.WriteLine(answer);
}
}
//find Second (x*x)
else if (x.Contains('^') && x.Length <= 2)
{
string digit = new String(x.Where(Char.IsDigit).ToArray());
delIntS delIntS = (a) => a * a;
Console.WriteLine(delIntS.Invoke(Convert.ToInt32(digit)));
}
//Lambda Expressions Added:
//find ^ (x^)
else if (x.Contains('^') && x.Length > 2)
{
string[] splitted = x.Split('^');
delInt del = (a, b) => Convert.ToInt32(Math.Pow(a, b));
Console.WriteLine(del.Invoke(Convert.ToInt32(splitted[0]), Convert.ToInt32(splitted[1])));
}
//Sqare
else if (x.Contains('_') && x.Length < 3)
{
string digit = new String(x.Where(Char.IsDigit).ToArray());
try
{
delDouble del = (a) => (Math.Sqrt(a));
Console.WriteLine(del.Invoke(Convert.ToDouble(digit)));
}
catch (Exception)
{
string error = ERROR.ErrorHandling;
Console.WriteLine(error);
}
}
//Commandlist
else if (x.Contains('h') && x.Length == 1)
{
string[] commandlist = { "+ - Add 2 numbers", "- - Subtract 2 numbers", "/ - Divide 2 numbers", "* - Multiply 2 numbers", "^ - Lift a number in 2, or x", "| - parenthesis", "c - Clear screen", "h - Show this list" };
for (int i = 0; i < commandlist.Length - 1; i++)
{
Console.WriteLine(commandlist[i]);
}
}
//clear screen
else if (x.Contains('c') && x.Length == 1)
{
Console.Clear();
Console.WriteLine("A little program...");
Console.WriteLine("");
Console.WriteLine("Type your calculation, and then press Enter for result");
Console.WriteLine("c clears the screen:");
Console.WriteLine("h For a list of commands:");
Console.WriteLine("");
}
else
{
string error = ERROR.ErrorHandling;
Console.WriteLine(error);
Console.WriteLine("");
}
}
catch (Exception)
{
string error = ERROR.ErrorHandling;
Console.WriteLine(error);
Console.WriteLine("");
}
}
}
