问个先后的问题# Programming - 葵花宝典
j*k
1 楼
class A{};
class B{};
class C: public A
{
C(){};
B b;
}
when instantiate C, C ctor first or B b first?
class B{};
class C: public A
{
C(){};
B b;
}
when instantiate C, C ctor first or B b first?
P*e
2 楼
A -> B -> C
【在 j*****k 的大作中提到】
: class A{};
: class B{};
: class C: public A
: {
: C(){};
: B b;
: }
: when instantiate C, C ctor first or B b first?
【在 j*****k 的大作中提到】
: class A{};
: class B{};
: class C: public A
: {
: C(){};
: B b;
: }
: when instantiate C, C ctor first or B b first?
p*o
3 楼
Well, to be more accurate, aren't A's ctor and B's ctor called by C's ctor?
【在 P********e 的大作中提到】
: A -> B -> C
【在 P********e 的大作中提到】
: A -> B -> C
P*e
4 楼
A's ctor yes,
B's ctor no.
【在 p***o 的大作中提到】
: Well, to be more accurate, aren't A's ctor and B's ctor called by C's ctor?
B's ctor no.
【在 p***o 的大作中提到】
: Well, to be more accurate, aren't A's ctor and B's ctor called by C's ctor?
p*o
5 楼
Why not? C() {} is C(): b() {} .
【在 P********e 的大作中提到】
: A's ctor yes,
: B's ctor no.
P*e
6 楼
Sure, you can explicitely write the code this way, then the answer change as
well
Just treat B as build-in type
【在 p***o 的大作中提到】
:
: Why not? C() {} is C(): b() {} .
well
Just treat B as build-in type
【在 p***o 的大作中提到】
:
: Why not? C() {} is C(): b() {} .
p*o
7 楼
The answer should not change no matter how I write the code (well, there
is a difference, if you treat it as a difference, for build-in types and
PODs).
I mean if we are talking about the 'body' (inside {}) of those ctors, then
A->B->C is definitely correct. But I don't know if the interviewer really
want this anwser ...
as
【在 P********e 的大作中提到】
: Sure, you can explicitely write the code this way, then the answer change as
: well
: Just treat B as build-in type
is a difference, if you treat it as a difference, for build-in types and
PODs).
I mean if we are talking about the 'body' (inside {}) of those ctors, then
A->B->C is definitely correct. But I don't know if the interviewer really
want this anwser ...
as
【在 P********e 的大作中提到】
: Sure, you can explicitely write the code this way, then the answer change as
: well
: Just treat B as build-in type
P*e
8 楼
To anwser it correctly is enough, i checked thinking in c++, that's about it
【在 p***o 的大作中提到】
: The answer should not change no matter how I write the code (well, there
: is a difference, if you treat it as a difference, for build-in types and
: PODs).
: I mean if we are talking about the 'body' (inside {}) of those ctors, then
: A->B->C is definitely correct. But I don't know if the interviewer really
: want this anwser ...
:
: as
【在 p***o 的大作中提到】
: The answer should not change no matter how I write the code (well, there
: is a difference, if you treat it as a difference, for build-in types and
: PODs).
: I mean if we are talking about the 'body' (inside {}) of those ctors, then
: A->B->C is definitely correct. But I don't know if the interviewer really
: want this anwser ...
:
: as
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