1、public class A{
public string brandname;
public bool ison;
public A()
{
brandname = "unknown";
ison = false;
}}2、public class B:A{//此处参考吧，这个看书能更快解决}...
public class A{protected string brandname;protected bool ison;public A(){this.brandname="unknown";this.ison=false;}}public class B:A{private int Curre...
