using System;
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello C#");
}
static int AddNumbers(int a, int b)
{
return a + b;
}
static int Fibonacci(int n)
{
if (n <= 1)
return n;
return Fibonacci(n - 1) + Fibonacci(n - 2);
}
}
class Calculator
{
private double value;
public Calculator()
{
this.value = 0.0;
}
public void Calculate(char op, double val)
{
switch (op)
{
case '+':
this.value += val;
break;
case '-':
this.value -= val;
break;
}
}
public double GetValue()
{
return this.value;
}
}