已知基类Employee只有一个构造函数,其定义如下: Employee::Employee(int n):id(n){ } Manager是Employee的派生类,则下列对Manager的构造函数的定义中,正确的是?A.Manager::Manager(int n):id(n){}B.Manager::Manager(int n){id=n;}C.Manager::Manager(int n):Employee(n){}D.Manager::Manager(int n){Employee(n);}

已知基类Employee只有一个构造函数,其定义如下: Employee::Employee(int n):id(n){ } Manager是Employee的派生类,则下列对Manager的构造函数的定义中,正确的是?

A.Manager::Manager(int n):id(n){}

B.Manager::Manager(int n){id=n;}

C.Manager::Manager(int n):Employee(n){}

D.Manager::Manager(int n){Employee(n);}


参考答案和解析
Manger::manger(int n):Employee(n){}

相关考题:

( 13 )下列关于派生类构造函数和析构函数的说法中,错误的是A )派生类的构造函数会隐含调用基类的构造函数B )如果基类中没有缺省构造函数,那么派生类必须定义构造函数C )在建立派生类对象时,先调用基类的构造函数,再调用派生类的构造函数D )在销毁派生类对象时,先调用基类的析构函数,再调用派生类的析构函数

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在C#中,假设Person是一个类,而ITeller是一个接口,下面的()类声明是正确的。A、class Employee:Person,ITeller B、class Employee:ITeller,PersonC、class Employee-Person,ITellerD、class Employee:Person / ITeller

在Person的一个派生类Employee里调用Person类的构造函数正确方式为()。A、base.Person(name,age)B、base(name,age)C、Person(name,age)D、this(name,age)

Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID) EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 HR_MGR 5000 106 Bryan 40 110 AD_ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EX_DIR 8000 120 Ravi 20 110 SA_DIR 6500 Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee's manager, for all the employees who have a manager and earn more than 4000?()A、SELECT employee_id "Emp_id", emp_name "Employee", salary, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary 4000;B、SELECT e.employee_id "Emp_id", e.emp_name "Employee",C、salary,D、employee_id "Mgr_id", m.emp_name "Manager" FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.salary 4000;

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单选题public class Employee{   private String name;   public Employee(String name){   this.name = name;  }   public String getName(){   return name;  }  }   public class Manager extends Employee{   public Manager(String name){   System.out.println(getName());  }  }   执行语句new Manager(“smith”)后程序的输出是哪项?()A smithB nullC 编译错误D name

单选题生成派生类对象时,派生类构造函数调用基类构造函数的条件是(  )。A无需任何条件B基类中显示定义了构造函数C派生类中显式定义了构造函数D派生类构造函数明确调用了基类构造函数

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单选题You created a view called EMP_DEPT_VU that contains three columns from the EMPLOYEES and DEPARTMENTS tables: EMPLOYEE_ID, EMPLOYEE_NAME AND DEPARTMENT_NAME. The DEPARTMENT_ID column of the EMPLOYEES table is the foreign key to the primary key DEPARTMENT_ID column of the DEPARTMENTS table. You want to modify the view by adding a fourth column, MANAGER_ID of NUMBER data type from the EMPLOYEES tables. How can you accomplish this task?()AALTER VIEW EMP_dept_vu (ADD manger_id NUMBER);BMODIFY VIEW EMP_dept_vu (ADD manger_id NUMBER);CALTER VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employee e, departments d WHERE e.department _ id = d.department_id;DMODIFY VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;ECREATE OR REPLACE VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;FYou must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.

单选题下列选项中,能实现对父类的getSalary方法重写的是(  )。class Employee{public double getSalary(){}}Aclass Manager extends Employee{public int getSalary(double x){}}Bclass Manager extends Employee{public double getSalary(int x,int y){}}Cclass Manager extends Employee{public double getSalary(){}}Dclass Manager extends Employee{public int getSalary(int x,int y){}}

单选题评估EMPLOYEE表的结构: EMPLOYEE_IDNUMBER(9) LAST_NAMEVARCHAR2(25) FIRST_NAMEVARCHAR2(25) DEPARTMENT_IDNUMBER(9) MANAGER_IDNUMBER(9) SALARYNUMBER(7,2) EMPLOYEE_ID列当前包含500个雇员标识号。业务需求已发生变化,您需要允许用户在标识值中包含文本字符。应该使用哪条语句来更改该列的数据类型()AALTER TABLE employee MODIFY(employee_id VARCHAR2(9))BALTER TABLE employee REPLACE(employee_id VARCHAR2(9))CALTER employee TABLEMODIFY COLUMN(employee_id VARCHAR2(15))D您不能修改EMPLOYEE_ID列的数据类型,因为该表不为空

单选题Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID) EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 HR_MGR 5000 106 Bryan 40 110 AD_ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EX_DIR 8000 120 Ravi 20 110 SA_DIR 6500 Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee's manager, for all the employees who have a manager and earn more than 4000?()ASELECT employee_id Emp_id, emp_name Employee, salary, employee_id Mgr_id, emp_name Manager FROM employees WHERE salary 4000;BSELECT e.employee_id Emp_id, e.emp_name Employee,Csalary,Demployee_id Mgr_id, m.emp_name Manager FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.salary 4000;