【单选题】有如下程序: #include #include using namespace std; class XCF{ int a; public: XCF(int aa=O):a(aA){cout$amp XCF(XCF&X){a=x.a;cout$amp ~XCF(){cout$amp int Geta(){return at} }; int main(){ XCF dl(5),d2(d1); XC...
【单选题】有如下程序: #include <iostream> using namespace std class Obj { static int i public: Obj( ){i++} ~Obj(){i--} static int getVal( ){ return i} } int Obj::i=0 void f() {Obj ob2 cout<<ob2.getVal( ) } int main(...
【单选题】有如下程序: #include<iostream> using namespace std class Base { protected: in i public: int j } class Derived:public Base { int m; public:int n; } int main() { Derived d d.i=0 //[1] d.j=0 //[2] d.m=0 //[3]...