下面程序的输出结果是【】。include using namespace std; class base { protected: int 下面程序的输出结果是【 】。include <iostream>using namespace std;class base{protected:int a;public:base(){cout<<"0":}};class basel: virtual public base{public:base1(){ cout<<"1";}};class base2 : virtual public base{public:base2(){cout<<"2";}};class derived : public base1,public base2{public:derived () {cout<<"3"; }}int main (){derived obj;cout<<end1;return 0;}

下面程序的输出结果是【】。include using namespace std; class base { protected: int

下面程序的输出结果是【 】。

include <iostream>

using namespace std;

class base

{

protected:

int a;

public:

base(){cout<<"0":}

};

class basel: virtual public base

{

public:

base1(){ cout<<"1";}

};

class base2 : virtual public base

{

public:

base2(){cout<<"2";}

};

class derived : public base1,public base2

{

public:

derived () {cout<<"3"; }

}

int main ()

{

derived obj;

cout<<end1;

return 0;

}


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