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C++ virtrual destructor

C++ virtrual destructor# JobHunting - 待字闺中

r*y2011-04-11 07:04

1 楼

costco买的，2个月没吃完就有味道了，是质量不行还是brown rice就这样？costco买
的whole wheat flour 也是这样

d*f2011-04-11 07:04

2 楼

Class A
{
A(){};
virtual ~A(){};
}
Class B : public A
{
B(){};
~B(){};
};
是不是~B() 有无virtual是一样的?

o*p2011-04-11 07:04

3 楼

保持干燥

【在 r********y 的大作中提到】

: costco买的，2个月没吃完就有味道了，是质量不行还是brown rice就这样？costco买
: 的whole wheat flour 也是这样

e*02011-04-11 07:04

4 楼

不行， base 定义了析构函数是virtual,
derived必须也定义析构函数是virtual

【在 d**f 的大作中提到】

: Class A
: {
: A(){};
: virtual ~A(){};
: }
: Class B : public A
: {
: B(){};
: ~B(){};
: };

m*i2011-04-11 07:04

5 楼

brown rice容易坏，需要冷藏/冷冻保存。室温俩月差不多了

【在 r********y 的大作中提到】

: costco买的，2个月没吃完就有味道了，是质量不行还是brown rice就这样？costco买
: 的whole wheat flour 也是这样

c*o2011-04-11 07:04

6 楼

Note: in a derived class, if your base class has a virtual destructor, your
own destructor is automatically virtual. You might need an explicit
destructor for other reasons, but there's no need to redeclare a destructor
simply to make sure it is virtual. No matter whether you declare it with the
virtual keyword, declare it without the virtual keyword, or don't declare
it at all, it's still virtual.

【在 e******0 的大作中提到】

: 不行， base 定义了析构函数是virtual,
: derived必须也定义析构函数是virtual

l*s2011-04-11 07:04

7 楼

没开包的可以放久一点吧？

c*s2011-04-11 07:04

8 楼

can't agree more...

your
destructor
the
declare

【在 c****o 的大作中提到】

: Note: in a derived class, if your base class has a virtual destructor, your
: own destructor is automatically virtual. You might need an explicit
: destructor for other reasons, but there's no need to redeclare a destructor
: simply to make sure it is virtual. No matter whether you declare it with the
: virtual keyword, declare it without the virtual keyword, or don't declare
: it at all, it's still virtual.