子类调用父类构造函数和析构函数的顺序
发布时间：2010/6/2 15:39:58 来源：城市学习网 编辑：ziteng
#include <iostream.h>
class B
{
public:
B(); //与类同名，构造函数
B(int i);
~B(); //~析构函数
void Print() const;//const，常量成员，不能修改
private:
int b;
};
B:B()
{
b=0;
cout < < "B 's default constructor called. " < <endl;
}
B::B(int i)
{
b=i;
cout < < "B 's constructor called. " < <endl;
}
B::~B()
{
cout < < "B 's destructor called. " < <endl;
}
void B:Print() const
{
cout < <b < <endl;
}
class C:public B
{
public:
C();
C(int i,int j);
~C(); [NextPage] void Print() const;
private:
int c;
};
C::C()
{
c=0;
cout < < "C 's default constructor called. " < <endl;
}
C::C(int i,int j):B(i)
{
c=j;
cout < "C 's constructor called. " < <endl;
}
C::~C()
{
cout < < "C 's destructor called. " < <endl;
}
void C::Print() const
{
B::Print();
cout < <c < <endl;
}
void main()
{
C obj(5,6);
obj.Print();
}
输出：
B 's constructor called.
C 's constructor called.
5
6
C 's destructor called.
B 's destructor called.
////////////////////////////////////////////
构造函数调用父类-》子类；析构函数调用子类-》父类
