长荣笔试(07.24)程序

写出下列程序输出的结果

 

#include <iostream>

using namespace std;

class A
{
public:
    A(){cout<< "A Begin" << endl;}
 ~A(){cout << "A End" << endl;}
};

class B
{
public:
    B(){cout << "B Begin" << endl;}
 ~B(){cout << "B End" << endl;}
};

class C
{
public:
    C(){cout << "C Begin" << endl;}
 ~C(){cout << "C End" << endl;}
};

class D: public A, B, C
{
public:
  
 D(){
  A();
  cout << "D Begin" << endl;
  }
 ~D(){cout << "D End" << endl;}
};

int main()
{
  D d;
 return 0;
}