有以下程序 #include using namespace std; class D{ int d; public:  D(int x=1):d(x){} ~D(){cout<<"D";}};  int main(){  D d[]={_____________}; D* p=new D[2]; delete[]p; return 0; } 程序运行的结果是DDDDD，请为横线处选择合适的程序（      ）

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