有如下程序: include using namespace std; class Obj { static in

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( ){ Obj ob1; f(); Obj *ob3=ew Obj; cout＜＜ob3-＞getVal( ); delete ob3; cout＜＜Obj::getVal( ); return 0; } 程序的输出结果是

A．232

B．231

C．222

D．221

[单选题]有如下程序: include using namespace std; class B { public:有如下程序： #include ＜iostream＞ using namespace std; class B { public: virtual void show() { cout＜＜"B"; } }; class D: public B{ public: void show() { cout＜＜"D"; } }; void fun1(B *ptr) { ptr-＞show()

[单选题]有如下程序: include using namespace std; class Part{ public:有如下程序： #include ＜iostream＞ using namespace std; class Part{ public: Part(int x=0):val(x) { cout＜＜val; } ～Part() { cout＜＜val; } private: int val; }; class Whole { public: Whole(int x, int y, int

[单选题]有如下程序: include using namespace std; class MyClass { public:有如下程序： #include ＜iostream＞ using namespace std; class MyClass { public: MyClass() { ++count; } ～MyClass() { --count; } static int getCount() { return count; } private: static int count; }； i

[单选题]有如下程序: include using namespace std; class Base { public:有如下程序： #include ＜iostream＞ using namespace std; class Base { public: Base(int x=0) { cout＜＜x; } } class Derived: public Base{ public: Derived(int x=0) { cout＜＜x; } private: Base val; }; int mai

[单选题]有如下程序: include using namespace std; class Sample { frien有如下程序： #include ＜iostream＞ using namespace std; class Sample { friend long fun(Sample s); public: Sample(long a) {x=a;} private: long x; }; long fun(Sample s) { if(s.x ＜ 2) return 1; return s.x

[单选题]有如下程序: include using namespace std; class point {int x,y; public:point( i有如下程序： #include ＜iostream＞ using namespace std; class point { int x, y; public: point( int vx, int vy ) { x = vx; y = vy; } point ( ) { x = 0; y = 0; } point operator+( point p

[单选题]有如下程序:include using namespace std;using namespace std;class Base{public:vo有如下程序： #include ＜iostream＞ using namespace std； using namespace std； class Base{ public： void fun( ){cout＜＜"Base::fun"＜＜endl：} }； class Derived：public Base{ public： void fun(

[单选题]有如下程序: include using namespace std; int main() { char st有如下程序： #include ＜iostream＞ using namespace std; int main() { char str[100], *p; cout＜＜"Please input a string:"; cin＞＞str; p=str; for (int i=0; *p!='/0'; p++,i++); cout＜＜i＜＜endl; return 0; }

[单选题]有如下程序：#include +using namespace std ；#includeusing namespace std;class Base{public:void fun(){cout<<"Base::fun"<};class Derived:public Base{public:void fun(){cout<<"Derived::fun"<}};int main(){D．erived d;d.fun();return 0;}已知其执行后

[单选题]有如下程序: include using namespace std; class BASE { public有如下程序： #include＜iostream＞ using namespace std; class BASE { public: ～BASE(){cout＜＜"BASE";} }; class DERIVED:public BASE { public: ～DERIVED(){cout＜＜"DERIVED";} }; int main(){DERIVEDx;retum 0;}