实例和继承问题 [英] Instance and Inheritance Question
问题描述
我知道这并没有太多的背景,但是,在这里(取自
Petzold'用C#编程Windows)片段:
class DatePlus:Date
{
public DatePlus(){}
public DatePlus(int year,int month,int day ):基地(年,月,
天){}
..
..
..
}
我理解DatePlus(){}的默认构造函数。关于第二个,我的问题是
。它是说DatePlus在它的
正式构造函数中接受一年,一个月和一天,但随后立即将它们传递给它继承的基类(日期) ?
谢谢。
< ne ****** *****@gmail.com>写道:我知道这里没有太多的背景,但是,在这里(取自Petzold'的编程Windows与C#)片段:
<类DatePlus:Date
{public DatePlus(){}
public DatePlus(int year,int month,int day):base(year,month,
day) ){}
。
。
。
我理解DatePlus(){}的默认构造函数。我的问题是关于第二个问题。是说DatePlus在其正式构造函数中接受了一年,一个月和一天,但是然后立即将它们传递给它继承自的基类(Date)?
它将它们传递给Date中的base *构造函数*。请注意,
构造函数本身并不是在DatePlus中继承的。
-
Jon Skeet - < sk * **@pobox.com>
http://www.pobox.com/ 〜双向飞碟
如果回复小组,请不要给我发邮件
但是这个:
public DatePlus(int year,int month,int day)
是DatePlus的构造函数,这里没有任何操作,正文是
empty {},因为Date的构造函数(用基数表示)
获取值并用它们做任何事情,对吗?
< ne *** ********@gmail.com>写道:但是这个:
公共DatePlus(int year,int month,int day)
是DatePlus的构造函数,没有做任何事情在这里,正文是空的{},因为日期的构造函数是(由基数代表)获取价值并用它们做任何事情,对吗?
是的。
-
Jon Skeet - < sk *** @ pobox.com>
http://www.pobox.com/~skeet
如果回复小组,请不要给我发邮件
I know this doesn''t have much of a context, but, in this (take from
Petzold''s Programming Windows with C#) snippet:
class DatePlus: Date
{
public DatePlus(){}
public DatePlus(int year, int month, int day): base(year, month,
day){}
..
..
..
}
I understand the default constructor for DatePlus(){}. My question is
about the second one. Is it saying that DatePlus accepts, in its
formal constructor a year, month and day, but then immediately passes
them to the base class that it inherited from (Date)?
Thank you.
<ne***********@gmail.com> wrote:I know this doesn''t have much of a context, but, in this (take from
Petzold''s Programming Windows with C#) snippet:
class DatePlus: Date
{
public DatePlus(){}
public DatePlus(int year, int month, int day): base(year, month,
day){}
.
.
.
}
I understand the default constructor for DatePlus(){}. My question is
about the second one. Is it saying that DatePlus accepts, in its
formal constructor a year, month and day, but then immediately passes
them to the base class that it inherited from (Date)?
It passes them to the base *constructor* in Date. Note that the
constructor itself isn''t inherited in DatePlus.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
But this:
public DatePlus(int year, int month, int day)
is the constructor for DatePlus and nothing is done here, the body is
empty {}, because the constructor for "Date" (represented by base) is
getting the values and doing whatever with them, correct?
<ne***********@gmail.com> wrote:But this:
public DatePlus(int year, int month, int day)
is the constructor for DatePlus and nothing is done here, the body is
empty {}, because the constructor for "Date" (represented by base) is
getting the values and doing whatever with them, correct?
Yes.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
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