class person
{
public virtual void sayhello()
{
}
}
class chinese:person
{
public overide void sayhello()
{
}
}
class Japanese:person
{
public overide void sayhello()
{
}
}
class American:person
{
public overide void sayhello()
{
本内容试读结束，登录后可阅读更多
下载后可阅读完整内容，剩余1页未读，立即下载
