Problem C: Person类与Student类的关系

 

Problem C: Person类与Student类的关系

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 2891  Solved: 2201
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Description

当然，一个student首先是一个person。所以，Student类是Person类的派生类。请定义Person类，包括：

1. 数据成员string name和int age，分别表示姓名和年龄。

2. 构造函数和析构函数，它们有相应的输出，见样例。

3. void show()函数：按照样例输出该对象的name和age属性值。

定义Student类，是Person类的子类：

1. 数据成员int grade，表示学生所在年级。

2. 构造函数和析构函数，它们有相应的输出，见样例。

3. void show()函数：按照样例输出该对象的grade属性值。

Input

只有1行，分为三部分：一个不含空白符的字符串以及两个整数。

Output

见样例。

Sample Input

Tom 19 3

　　

Sample Output

A person Tom whose age is 19 is created.
A student whose grade is 3 is created.
Name is Tom and age is 19.
Grade is 3.
A student whose grade is 3 is erased.
A person Tom whose age is 19 is erased.

　　

HINT

 

Append Code

append.cc, 

int main()
{
    string n;
    int a, g;
    cin>>n>>a>>g;
    Student student(n, a, g);
    student.Person::show();
    student.show();
    return 0;
}

　　

#include <iostream>
using namespace std;
class Person
{
public :
    string name;
    int age;
    Person(string arr, int brr):name(arr), age(brr)
    {
        cout<<"A person "<<name<<" whose age is "<<age<<" is created."<<endl;
    }
    void show()
    {
        cout<<"Name is "<<name<<" and age is "<<age<<"."<<endl;
    }
    ~Person()
    {
        cout<<"A person "<<name<<" whose age is "<<age<<" is erased."<<endl;
    }
};
class Student :public Person
{
public :
    int grade;
    Student(string arr, int a, int g):Person(arr,a),grade(g)
    {
        cout<<"A student whose grade is "<<grade<<" is created."<<endl;
    }
    void show()
    {
        cout<<"Grade is "<<grade<<"."<<endl;
    }
    ~Student()
    {
        cout<<"A student whose grade is "<<grade<<" is erased."<<endl;
    }
};
int main()
{
    string n;
    int a, g;
    cin>>n>>a>>g;
    Student student(n, a, g);
    student.Person::show();
    student.show();
    return 0;
}