static void Main(string[] args)
{
Console.WriteLine(SimpleCalculator.Sum(10, 10));
Console.WriteLine(SimpleCalculator.Multiply(10, 10));
DoCalc performCalculation;
int result;
performCalculation = SimpleCalculator.Sum;
result = performCalculation(10, 5);
Console.WriteLine(result);
performCalculation = SimpleCalculator.Multiply;
result = performCalculation(10, 5);
Console.WriteLine(result);
DoCalc doCalc1 = SimpleCalculator.Sum;
DoCalc doCalc2 = SimpleCalculator.Multiply;
DoCalc doCalc3 = (DoCalc)Delegate.Combine(doCalc1, doCalc2);
result = doCalc3(10, 5);
Console.WriteLine(result);
DoCalc doCalc4 = doCalc1 + doCalc2;
doCalc4 += doCalc2 + doCalc2;
doCalc4 -= doCalc1;
result = doCalc4(10, 5);
Console.WriteLine(result);
Func <int, int, int> doCalc5 = SimpleCalculator.Sum;
Func <int, int, int> doCalc6 = SimpleCalculator.Sum;
doCalc6 += doCalc5 + doCalc5 + doCalc5;
}
public int Calc(string a, string b, DoCalc doCalc)
{
int x = Convert.ToInt32(a);
int y = Convert.ToInt32(b);
return doCalc(x, y);
}
