using System;
namespace ConsoleApplication_C_Sharp
{
public class Example
{
int n = 3;
public void Show()
{
Console.WriteLine(n);
}
public void Calc(int v)
{
n = n * v;
}
}
class Program
{
static void Main(string[] args)
{
Example e = new Example();
e.Calc(10);
e.Show();
}
}
}
/*
run:
30
*/