实验8：Problem D: 选举班干部了！

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Problem D: 选举班干部了！

Problem D: 选举班干部了！

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 531  Solved: 308
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Description

新学期伊始，某班要通过竞争上岗方式竞选班干部。包括班长、团支书等。现在需要你来设计2个类Student和StudentCadre来模拟这一过程。

1.Student类是学生类，包括

（1）属性：string name——姓名。bool sex——性别。int grade——年级。Student *next——指向下一个学生指针。

（2）方法：

• 构造函数Student(string _name, bool _sex, int _grade)——初始化一个对象。注意：其中的next初始化为NULL。
• 析构函数。
• void showInfo()——输出一个学生的信息。next除外。
• Student* getNext()——获得next指针。
• void setNext(Student*)——设置next指针指向对象。

2. StudentCadre类是Student类的派生类，包括：

（1）属性：string position——表示竞聘岗位。

（2）方法：

• StudentCadre(string _name, bool _sex, int _grade, string pos)——构造函数，初始化各种属性。
• 析构函数。
• void showInfo()——显示信息。

构造函数和析构函数都有输出，具体见样例。

Input

输入有多行。

第1行有4部分：姓名、性别（0或1）、年级（整数）和岗位。

第2行是一个正整数N，表示有N个学生支持该人竞聘相应岗位。之后有N行，每行有3个部分，分别是一个学生的姓名、性别和年级。

Output

见样例。

Sample Input

Tom 0 2015 Monitor 3 Jack 1 2015 Mary 0 2015 Sherry 1 2015

Sample Output

A student named by Tom is created! A student cadre with position Monitor is created. A student named by Jack is created! A student named by Mary is created! A student named by Sherry is created! name = Tom, sex = 0, grade = 2015; position = Monitor. name = Jack, sex = 1, grade = 2015; name = Mary, sex = 0, grade = 2015; name = Sherry, sex = 1, grade = 2015; A student named by Tom is erased. A student named by Jack is erased. A student named by Mary is erased. A student named by Sherry is erased.

HINT

string类是C++提供的类，在头文件string中，可以用#include <string>来使用这个类。该类的对象可以直接利用赋值运算符（=）进行复制，也可以直接利用cout输出，或利用cin输入。

Append Code

append.cc,

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All Copyright Reserved 2010-2011 SDUSTOJ TEAM
GPL2.0 2003-2011 HUSTOJ Project TEAM
Anything about the Problems, Please Contact Admin:admin

#include<iostream>
#include<string>
using namespace std;
class Student{
protected:
    string name;
    bool sex;
    int grade;
    Student *next;
public:
    Student(string _name, bool _sex, int _grade):name(_name),sex(_sex),grade(_grade),next(NULL){cout<<"A student named by "<<name<<" is created!"<<endl;}
    ~Student(){cout<<"A student named by "<<name<<" is erased."<<endl;}
    void showInfo(){cout<<"name = "<<name<<", sex = "<<sex<<", grade = "<<grade<<";";}
    Student* getNext(){return next;}
    void setNext(Student* s){next=s;}
};
class StudentCadre:public Student{
protected:
    string position;
public:
    StudentCadre(string _name, bool _sex, int _grade, string pos):Student(_name,_sex,_grade),position(pos){cout<<"A student cadre with position "<<position<<" is created."<<endl;}
    ~StudentCadre(){cout<<"A student named by "<<name<<" is erased."<<endl;};
    void showInfo(){cout<<"name = "<<name<<", sex = "<<sex<<", grade = "<<grade<<"; position = "<<position<<".";}

};
int main()
{
    int num;
    string name, position;
    bool sex;
    int grade;
    Student *header, *student, *curStudent;

    cin>>name>>sex>>grade>>position;
    header = new StudentCadre(name, sex, grade,position);
    curStudent = header;
    cin>>num;
    for (int i = 0; i < num; i++)
    {
        cin>>name>>sex>>grade;
        student = new Student(name, sex, grade);
        curStudent -> setNext(student);
        curStudent = curStudent -> getNext();
    }
    ((StudentCadre*)header) -> showInfo();
    cout<<endl;
    curStudent = header;
    while (curStudent -> getNext() != NULL)
    {
        curStudent = curStudent -> getNext();
        curStudent->showInfo();
        cout<<endl;
    }

    curStudent = header;
    while (curStudent != NULL)
    {
        student = curStudent;
        curStudent = curStudent -> getNext();
        delete student;
    }
    return 0;
}