static void Test3()
{
Calc calc = new Calc();
TypFunc func = calc.Sum;
func += new TypFunc(calc.Sub);
func += Calc.Mult;
// func += new TypFunc(calc.Sub) + new TypFunc(calc.Sub);
// func =(TypFunc) Delegate.Combine(func, new TypFunc( calc.Div));
double a = 10, b = 20;
Console.WriteLine(func(a, b));
Console.WriteLine("-----------------------------");
func += Calc.Mult;
foreach (TypFunc item in func.GetInvocationList())
{
Console.WriteLine(item.Method.Name + "=" + item(a, b));
}
Console.WriteLine("-----------------------------");
Console.WriteLine(func(a, b));
}
static void Test1()
{
try
{
Console.WriteLine("Введіть вираз: ");
string formula = Console.ReadLine(); //10 + 60
string[] str = formula.Split(" +-*/".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
double a = Convert.ToDouble(str[0]);
double b = Convert.ToDouble(str[1]);
Sign sign;
if (formula.Contains('+'))
{
sign = Sign.ADD;
}
else if (formula.Contains('-'))
{
sign = Sign.SUB;
}
else if (formula.Contains('*'))
{
sign = Sign.MULT;
}
else
{
sign = Sign.DIV;
}
Calc calc = new Calc();
TypFunc func = null;
switch (sign)
{
case Sign.ADD:
func = calc.Sum;
break;
case Sign.SUB:
func = new TypFunc(calc.Sub);
break;
case Sign.MULT:
func = Calc.Mult;
break;
case Sign.DIV:
func = calc.Div;
break;
}
Console.WriteLine($"{a} {sign} {b}={func?.Invoke(a, b)}");
if (func != null)
{
Console.WriteLine($"{a} {sign} {b}={func(a, b)}");
}
else
{
Console.WriteLine("Error");
}
}
catch (Exception EX)
{
Console.WriteLine("Error" + EX.Message);
}
}
