有如下类定义： class Shape{ public: ___________________ //纯虚函数Draw的声明 };横线处缺失的纯虚函数 Draw 的声明是

单项选择题有如下程序：#include#includeusing namespace std;class TV{public:TV(int s=41):size(s) { cout<<’C’; }~TV() { cout<<’D’; }void Print() const { cout<<size; }private:int size;};int main(){TV room1(54);TV *room2=new TV[2];room1.Print();delete[] room2;return 0;}运行时的输出结果是

单项选择题有如下程序：#include #include using namespace std;class MyBag{public:friend int NancyShow(MyBag& bag);MyBag(string br= ABC ):brand(br) { }private:string brand;};int NancyShow(MyBag& bag){if(bag.brand!= Coach ) return 1;else return 0;}int main() {int count=0;MyBag arrays[3]={MyBag( CityLife ),MyBag( Coach )};for(int i=0; i<3; i++)count+=NancyShow(arrays[i]);cout<<count;return 0;}运行时的输出结果是