若有以下程序:includeusingnamespacestd;classBase{public: Base() {x=0; } intx;}; 若有以下程序： #include ＜iostream＞ using namespace std； class Base { public： Base() { x=0； } int x； }； class Derivedl : virtual public Base { public: Derivedl() { x=10; } }; class Derived2 : virtual public Base { public: Derived2() { x=20; } }; class Derived : public Derivedl,protected Derived2 { }; int main () { Derived obj; cout＜＜obj.x＜＜end1; return 0; } 该程序运行后的输出结果是( )。A．10B．20C．30D．0
若有以下程序:includeusingnamespacestd;classBase{public: Base() {x=0; } intx;};
若有以下程序： #include ＜iostream＞ using namespace std； class Base { public： Base() { x=0； } int x； }； class Derivedl : virtual public Base { public: Derivedl() { x=10; } }; class Derived2 : virtual public Base { public: Derived2() { x=20; } }; class Derived : public Derivedl,protected Derived2 { }; int main () { Derived obj; cout＜＜obj.x＜＜end1; return 0; } 该程序运行后的输出结果是( )。
A．10
B．20
C．30
D．0
相关考题：
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 main() { Derived d(1); return 0; }程序的输出结果是A．0B．1C．1D．1
有如下程序:includeusing namespace std;class Base{public:Base(int x=0){cout 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 main( ){ Derived d(1)； return 0； } 程序的输出结果是A．0B．1C．01D．001
有以下程序:include using namespace std; class Base { public: Base() { K=0; } int 有以下程序：include＜iostream＞using namespace std；class Base{public：Base(){K＝0；}int x；}；class Derivedl：virtual public Base{public：Derivedl(){x＝10；}}；class Derived2：virtua1 public Base
若有以下程序:include using namespace std;class Base{public: Base ( ) {x=0; } in 若有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base ( ) { x=0; } int x; }; class Derivedl : virtual public Base { public: Derivedl () { x=10; } }; class Derived2 : virtual public Base { public: Derived2 () { x=20; } }; class Derived : public Derivedl,protected Derived2{ }; int main ( ) { Derived obj; cout＜＜obj .x＜＜end1; return 0; } 该程序运行后的输出结果是 ( )。A．20B．30C．10D．0
若有以下程序:include using namespace std;class Base {public:Base() { x=0; } int 若有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base() { x=0; } int x; }; class Derivedl: virtual public Base { public: Derivedl() { x=10; } }; class Derived2: virtual public Base { public: Derived2() ( x=20; } }; class Derived: public Derivedl,protected Derived2 { }; int main() { Derived obj; cout＜＜obj.x＜＜end1; return 0; } 该程序运行后的输出结果是A．20B．30C．10D．0
若有以下程序: include using namespace std;class Base{public:Base ( ){x=0;}int x 若有以下程序：# include ＜iostream＞using namespace std;class Base{public: Base ( ) { x=0; } int x;};class Derived1 : virtual public Base{public: Derived1 ( ) { x=10; }}; class Derived2 : virtual public Base{public: Derived2 () { x=20; }};class Derived : public Derived1,protected Derived2{ };int main(){ Derived obj; cout＜＜obj.x＜＜end1; return 0;} 该程序运行后的输出结果是A．10B．20C．30D．0
若有以下程序:include using namespace std;class Base{public:Base (){x=0;}int x;} 若有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base () { x=0; } int x; }; class Derived1 : virtual public Base { public: Derived1 () { x=10; } }; class Derived2 : virtual public Base { public: Derived2 () { x=20; } }; class Derived : public Derived1,protected Derived2{ }; int main() { Derived obi; cout＜＜obj.x＜＜endl; return 0; } 该程序运行后的输出结果是A．20B．30C．10D．0
有如下程序： #include＜iostream) using namespace std； classBase{ public： Base(int x＝0){cout＜＜x；} }； Class Derived：public Base{ public： Derived(int x＝0){cout＜＜x；} private： Base Val； }； int main(){ Derived d(1)； returnA．100B．000C．010D．001
若有以下程序:includeusing namespace Std;Class Base{public:Base(){x=0;}int x;};c 若有以下程序： #include＜iostream＞ using namespace Std; Class Base {public： Base() {x＝0；} int x；}； class Derivedl：virtua1 public Base {public： Derived1() {x＝10；}}； class Derived2：virtual1 public Base {public： Derived2()A．20B．30C．10D．0