static void Main(string[] args)
{
difclass obj = new difclass();
Console.WriteLine("value is {0}", obj.value);
//自动选择了适合参数类型的重载函数
ModifyValue(obj.value);
Console.WriteLine("value2 is {0}", obj.value);
ModifyValue(obj);
Console.WriteLine(obj.value);
obj.Addm();
obj.dispva();
//Console.WriteLine();
Console.ReadKey();
}
//引用类型，重载函数，参数类型不一致
static void ModifyValue(difclass obj)
{
obj.value += 2;
}