第十、十一周项目-阅读程序，写出这些程序的运行结果(4)

/*
*Copyright(c)2016,烟台大学计算机与控制工程学院
*All rights reserved
*文件名称：123.cpp
*作    者：王蕊
*完成日期：2016年5月6日
*版 本 号：v1.0
*
*问题描述：阅读程序，写出执行结果。
*/
#include<iostream>
using namespace std;
class Base
{
public:
Base(char i)
{
cout<<"Base constructor.--"<<i<<endl;
}
};
class Derived1:virtual public Base
{
public:
Derived1(char i,char j):Base(i)
{
cout<<"Derived constructor.--"<<j<<endl;
}
};
class Derived2:virtual public Base
{
public:
Derived2(char i,char j):Base(i)
{
cout<<"Derived2 constructor.--"<<j<<endl;
}
};
class MyDerived:public Derived1,public Derived2
{
public:
MyDerived(char i,char j,char k,char l,char m,char n,char x):
Derived2(i,j),Derived1(k,l),Base(m),d(n)
{
cout<<"MyDerived constructor.--"<<x<<endl;
}
private:
Base d;
};
int main()
{
MyDerived obj('A','B','C','D','E','F','G');
return 0;
}