using System;

class Myclass
{
	public static int a,b,c;
	public Myclass()
	{
		a=1;
		b=2;
		c=3;
	}

	public void F(int a1,int b1,int c1)//值參數
	{
		Console.WriteLine("in F().");
		int temp=a1;
		a1=b1;
		b1=c1;
		c1=temp;//交換a、b和c的值
		Console.WriteLine("a1={0},b1={1},c1={2}",a1,b1,c1);
	}

	public static void Main()
	{
		Console.WriteLine("in Main().");
		Myclass myclass=new Myclass();
		Console.WriteLine("a={0},b={1},c={2}",Myclass.a,Myclass.b,Myclass.c);
		Console.WriteLine("changing the value of a、b and c......");
		myclass.F(a,b,c);//傳遞值參數
		Console.WriteLine("after changing.");
		Console.WriteLine("a={0},b={1},c={2}",Myclass.a,Myclass.b,Myclass.c);
		//主函數中a、b和c的值并沒有變化
	}
}