[HP笔试题目]
一个类A继承类B并且包含C，B中包含D。在构造A的时候，先构造B中的D，再构造B，然后构造A中的C,最后构造A。虚构的过程刚好相反。例子如下：|
#include<iostream.h>
class IDCart{
public:
IDCart()
{
cout<<"IDCart construstor"<<endl;
}
~IDCart()
{
cout<<"IDCart destrustor"<<endl;
}
};
class person{
public:
person()
{
cout<<"person contrustor"<<endl;
}
~person()
{
cout<<"person destrustor"<<endl;
}
private:
IDCart id;
};
class subject{
public:
subject()
{
cout<<"subject construstor"<<endl;
}
~subject()
{
cout<<"subject destrustor"<<endl;
}
};
class teacher:public person{
public:
teacher()
{
cout<<"teacher construstor"<<endl;
}
~teacher()
{
cout<<"teacher destrustor"<<endl;
}
private:
subject sub;
};
void main()
{
teacher tea;
}
运行的结果如下：
IDCart construstor
person contrustor
subject construstor
teacher construstor
teacher destrustor
subject destrustor
person destrustor
IDCart destrustor