有如下程序: include using namespace std class Base{ int b; public: Base(int i) {

有如下程序：

include＜iostream＞

using namespace std

class Base{

int b;

public:

Base(int i) {b=i;}

Void disp ( ) {cout＜＜"Base:b="＜＜b＜＜''; }

};

class Base1:virtual public Base{

public:

Base1(int i):Base(i){}

};

class Base2:virtual public Base{

public:

Base2(int i):Base(i){}

};

class Derived:public Basepublic Base1{

int d;

public:

Derived(int i ,int j):Base1(j),Base2(j),【 】

{ d=i; }

void disp() {cout＜＜"Derived:d="＜＜d＜＜' ';}

};

int main()

Derived objD(1,2);objD. disp()

objD. Base::disp();

objD. Base1::disp()

objD. Base2::disp();

return 0;

}

请将程序补充完整，使程序在运行时输出：

Derivd:d=1 Base:b＝2 Base:b=2 Base:b=2