虚基类及其派生类的构造函数

 在多重继承的情况下，将派生类实例化为对象时，构造函数的调用顺序

#include<iostream.h>
class A
{
public:
 A()
 {
  cout<<"类A的构造函数"<<endl;
 }
 ~A()
 {
  cout<<"类A的析构函数"<<endl;
 }
};
class B
{
public:
 B()
 {
  cout<<"类B的构造函数"<<endl;
 }
 ~B()
 {
  cout<<"类B的析构函数"<<endl;
 }
};
class C:virtual public A
{
public:
 C()
 {
  cout<<"类C的构造函数"<<endl;
 }
 ~C()
 {
  cout<<"类C的析构函数"<<endl;
 }
};
class D:virtual public A
{
public:
 D()
 {
  cout<<"类D的构造函数"<<endl;
 }
 ~D()
 {
  cout<<"类D的析构函数"<<endl;
 }
};
class E
{
 public:
 E()
 {
  cout<<"类E的构造函数"<<endl;
 }
 ~E()
 {
  cout<<"类E的析构函数"<<endl;
 }
};
class F:public B,public C,public D
{
private:
 E eVar;
public:
 F()
 {
  cout<<"类F的构造函数"<<endl;
 }
 ~F()
 {
  cout<<"类F的析构函数"<<endl;
 }
};
void main()
{
 F fVar;
 cout<<"程序结束!"<<endl;
}