下面程序的输出结果是( )。 public class Sun { public static void main(String args[ ]) { int x=0; for(int i=1;i＜=4;i++) { x=4; for(int j=1;j＜=3;j++) { x=3; for(int k=1;k＜=2;k++) { x-x+6; } } } System.out.println(x); } }
A．7
B．15
C．157
D．538
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
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程序的输出结果是【 】。 include using namespace std; class A{ int x; public: A(int程序的输出结果是【 】。include ＜iostream＞using namespace std；class A{int x；public：A(int x=1)：x(x){cout＜＜x；}}；void main(){A a，b(2)，c(3)；}
下面程序的输出结果是【】。include using namespace std; class base { protected: int下面程序的输出结果是【 】。include ＜iostream＞using namespace std;class base{protected:int a;public:base(){cout＜＜"0":}};class basel: virtual public base{public:base1(){ cout＜＜"1";}};class base2 : virtual public base{public:base2(){cout＜＜"2";}};class derived : public base1,public base2{public:derived () {cout＜＜"3"; }}int main (){derived obj;cout＜＜end1;return 0;}
下面程序段中的错误语句是 ______。 class M{ int i； public： void ~AA(int); AA *p; void AA()； void AA(int x){i=x;}; };A．AA *p；B．void ~AA(int)；C．void AA(int)；D．void AA(int x){i=x;}；
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
如下程序的输出结果是includeusing namespace std;class MyClass{public:MyClass(int如下程序的输出结果是 #include＜iostream＞ using namespace std； class MyClass{ public： MyClass(int i=0){cout＜＜1；} MyClass(const MyClass＆x)}cout＜＜2；} }； int main( ){ MyClass objl(1)，obj2(2)，ohj3(objl)； return 0； }A．112B．111C．121D．113
下面程序的结果是 ______。includeclass A{ public:virtual voidfun()=0{};};class下面程序的结果是 ______。 #include＜iostream.h＞ class A{ public: virtual void fun()=0{}; }; class B:public A{ public: void fun () {cout＜＜ "new file" ;} }; class C: public A{ public: void fun (){cout＜＜"open file"＜＜ " " } }; class D: public A{ public: void fun () {cout＜＜ "save file\n" ;} }; void main() { A a,*p; B b; C c; D d; p=&c; p-＞fun (); p=&b; p-＞fun (); p=&d; p-＞fun(); }A．new file open file save fileB．new file new file new fileC．编译出错D．open file new file save file
