更多"有如下类声明: class Base protected: "的相关试题:
[单项选择]有如下类的声明: class Base{ protected: int amount; public: Base(int n=0):amount(n){} int getAmount( )const{return amount;} }; class Derived:public Base{ protected: int value public: Derived(int m,int n):value(m),Base(n){} int getData( )const{return value+amount;} };已知x是一个Derived对象,则下列表达式中正确的是
A. value+ getAmount()
B. getData()- getAmount()
C. getData()- amount
D. value+ amount
[单项选择]有如下类声明: class Base{ protected: int amount; public: Base(int n=0):araount(n){ } int getAmount( )const{retum amount;} }; class Derived:public Base{ protected; int value; public: Derived(int m,int n):value(n1),Base(n){ } int getData( )const{return value+amount;} }; 已知x是一个Derived对象,则下列表达式中正确的是
A. x.value+x.getAmount( )
B. x.getData( )-x.getAmount( )
C. x.getData( )-x.amount
D. x.value+x.amount
[单项选择]有如下类的声明:
class Base{
protected:
int amount;
public:
Base(int n=0):amount(n){}
int getAmount( )const{return amount;}
};
class Derived:public Base{
protected:
int value
public:
Derived(int m,int n):value(m),Base(n){}
int getData( )const{return value+amount;}
};
已知x是一个Derived对象,则下列表达式中正确的是
A. x. value+x. getAmount()
B. x. getData()-x. getAmount()
C. x. getData()-x. amount
D. x. value+x. amount
[填空题]有如下类声明:
class MyClass
{
int i;
private:int j;
protected: int k;
public: int m, n;
其中,私有成员的数量为 【15】 。
[填空题]有如下类声明:
class TestClass
int i;
private:int j;
protected:int k;
public:int m,n;
;
其中,私有成员的数量为______。
[填空题]有如下类声明:
class MyClass
int i;
private:int j;
protected: int k;
public: int m, n;
其中,私有成员的数量为 【15】 。
[填空题]有如下类声明:
class MyClass
{
int i;
private: int j;
protected: int k;
public: int m, n;
}; 其中,私有成员的数量为 【9】 。
[单项选择]下面程序段的输出结果是 class Base { int i; Base( ) { add(1); } void add(int v) { i+=v; } void print( ) { System.out.println(i); } } class Extension extends Base { Extension( ) { add(2); } void add(int v) { i+=*2; } } public class Test { public static void main(String args[]) { bogo(new Extension( )); } static void bogo(Base b) { b.add(8); b.print( ); } }
A. 9
B. 18
C. 20
D. 22
[单项选择]有如下类声明: class MyBASE { int k; public: void set(int n) {k=n;} int get( )const{return k;} }; class MyDERIVED:protected MyBASE { protected. int j; public: void set(int m,int n){MyBASE::set(m);j=n;} int get( )const{return MyBASE::get( )+j;} }; 则类MyDERIVED中保护的数据成员和成员函数的个数是( )。
A. 4
B. 3
C. 2
D. 1