C++构造函数初始化顺序

C++构造函数按下列顺序被调用：(1)任何虚拟基类的构造函数按照它们被继承的顺序构造；
(2)任何非虚拟基类的构造函数按照它们被继承的顺序构造；
(3)任何成员对象的构造函数按照它们声明的顺序调用；
(4)类自己的构造函数。

#include 

using namespace std;class OBJ1{public:    OBJ1(){ cout <<"OBJ1\n"; }};class OBJ2{public:    OBJ2(){ cout <<"OBJ2\n"; }};class Base1{public:    Base1(){ cout <<"Base1\n"; }};class Base2{public:    Base2(){ cout <<"Base2\n"; }};class Base3{public:    Base3(){ cout <<"Base3\n"; }};class Base4{public:    Base4(){ cout <<"Base4\n"; }};class Derived :public Base1, virtual public Base2,    public Base3, virtual public Base4{public:    Derived() :Base4(), Base3(), Base2(),        Base1(), obj2(), obj1()    {        cout <<"Derived ok.\n";    }protected:    OBJ1 obj1;    OBJ2 obj2;};int main(){    Derived aa;    cout <<"This is ok.\n";    int i;    cin >> i;    return 0;}

结果：

Base2
Base4
Base1
Base3
OBJ1
OBJ2
Derived ok.
This is ok.