public class X { public static void main （Stringargs） { String s1 = new String （“true”）； Boolean b1 = new Boolean （true）； if （s2.equals（b1）） { System.out.printIn（“Equal”）； } } } What is the result？ （）
有以下程序: include class A { intx; public: A(int a) { x=a;} friend class B;有以下程序：include＜iostream.h＞class A{int x;public:A(int a){x=a;}friend class B;}class B{public:void print(A a){a. x--;cout＜＜a.x＜＜end1;}};void main(){A a(10);B b;b.print(a) ;}程序执行后的输出结果是【 】。
点击查看答案
有如下程序:include using namespace std;Class x{protected: int a;public: x() {a=有如下程序： #include ＜iostream＞ using namespace std; Class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜A．1B．123C．242D．244
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: Derived1() { x=10; } }; class Derived2: virtual public Base publici 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．20B．30C．10D．0
若有以下程序:includeusing namespace std;class data{public: int x; data(int x){若有以下程序： #include＜iostream＞ using namespace std; class data { public: int x; data(int x) { data::x=x; } class A private: data dl; public: A(int x): dl(x){ } void dispaO cout＜＜dl.x＜＜","; } }; class B: public A { private: data d2; public: B(int x):A(x-1),d2(x){ } void dispb() { cout＜＜d2.x＜＜endl; } }; class C: public B { public: C(int x):B(x-1){ } void disp0 { dispa(); dispb(); } }; int main() { C obj(5); obj.disp(); return 0; } 程序执行后的输出结果是( )。A．5,5B．4,5C．3,4D．4,3
有如下程序: include class x { protected: int a; public:x(){ a=1;} }; class x有如下程序： #include ＜iostream.h＞ class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜a; } }; class x2 : virtual public x { public: x2() { a+=2; cout＜＜a; } }; class y : public xl,public x2 { public: y() { cout＜＜a＜＜end1; } }; int main() { y obj; return O; } 该程序运行后的输出结果是( )。A．1B．123C．242D．244
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
