（继承）Problem A: Person类与Student类的关系

Problem A: Person类与Student类的关系

Time Limit: 1 Sec Memory Limit: 128 MB
Submit: 1403 Solved: 1056
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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.

Append Code

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

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