問題及程式碼：

/*copyright(c)2016.煙臺大學計算機學院
* All rights reserved,
* 檔名稱：text.Cpp
* 作者：吳敬超
* 完成日期：2016年5月10日
* 版本號：codeblock
*
* 問題描述:
* 輸入描述:
* 程式輸出： 輸出結果
*/
#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<<"Derived1 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;
}
 

執行結果：