下面程序的运行结果是 #include classbase { protected: inta; public: base(){cout&lt

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下面程序的运行结果是

#include

class base

{

protected:

int a;

public:

base(){ cout $amp;class basel:virtual base

}

public:

base 1(){cout $amp;};

class base2:virtual base

{

public:

base2(){cout $amp;};

class derived:public base1,public base2

{

public:

derived(){cout $amp;};

void main()

{

derived obj;

cout <

}

A.0123

B.3120

C.0312

D.3012

请帮忙给出正确答案和分析,谢谢!

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