package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）A、 It can be any class.B、 No class has access to base.C、 The class must belong to the geometry package.D、 The class must be a subclass of the class Hypotenuse.
package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）
- A、 It can be any class.
- B、 No class has access to base.
- C、 The class must belong to the geometry package.
- D、 The class must be a subclass of the class Hypotenuse.
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下面程序的运行结果是#includeclass base{protected：int a;public：base（）{ cout ”0”;}class basel：virtual base}public：base 1（）{cout ”1”;}};class base2：virtual base{public：base2（）{cout ”2”;（};class derived：public base1，public base2{public：derived（）{cout ”3”;}};void main（）{derived obj;cout }A．0123B．3120C．0312D．3012
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有以下程序 include using namespace std; class Base { int a; public: Base(int x) 有以下程序include ＜iostream＞using namespace std;class Base{int a;public:Base(int x){ a=x; }void show(){ cout＜＜a; }class Derived : public Base{int b;public:Derived(int i) :Base(i+1),b(i){}void show() { cout＜＜b;};int main (){Base b(5),*pb;Derived d(1);pb=d;pb-＞show ();return 0;}运行后的打印结果是______。
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package foo； public class Outer （ public static class Inner （ ） ） Which statement is true？ （） A、 An instance of the Inner class can be constructed with “new Outer.Inner （）”B、 An instance of the inner class cannot be constructed outside of package foo.C、 An instance of the inner class can only be constructed from within the outer class.D、 From within the package bar， an instance of the inner class can be constructed with “new inner（）”
public class Parent { int change（） {…} } class Child extends Parent { } Which methods can be added into class Child？（） A、 public int change（）{}B、 int chang（int i）{}C、 private int change（）{}D、 abstract int chang（）{}
单选题package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）A It can be any class.B No class has access to base.C The class must belong to the geometry package.D The class must be a subclass of the class Hypotenuse.
单选题package foo； public class Outer { public static class Inner { } } Which statement is true？（）A Compilation fails.B An instance of the Inner class can be constructed with “new Outer.Inner（）”.C An instance of the Inner class cannot be constructed outside of package foo.D An instance of the Inner class can be constructed only from within the Outer class.E From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.