以下程序运行结果为() #include

#include<iostream>

using namespace std;

class Base

{

public:

Base(int i){cout<<i;}

~Base( ){}

}

class Base1:virtual public Base

{

public:

Base1(int i,int j=0):Base(j){cout<<i;}

~Base1( ){}

};

class Base2:virtual public Base

{

public:

Base2(int i, int j=0):Base(j){cout<<i;}

~Base2( ){}

};

class Derived:public Base2,public Base1

{

public:

Derived(int a, int b, int c, int d):mem1(a),mem2(b),Base1(c),Base2(d),Base(a)

{cout<<b;}

private:

Base2 mem2;

Base1 mem1;

};

void main( ){ Derived objD(1,2,3,4);}