Person类与Student类的关系

最新推荐文章于 2021-11-12 21:54:07 发布

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本文介绍了一个C++面向对象编程实例，通过Person基类和Student派生类的定义，展示了如何使用构造函数、析构函数及成员函数来实现类的基本操作。输入样本数据创建对象，并调用成员函数进行属性展示。

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Problem C: Person类与Student类的关系Time Limit: 1 Sec Memory Limit: 128 MB
Submit: 3714 Solved: 2798
[Submit][Status]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：

数据成员string name和int age，分别表示姓名和年龄。
构造函数和析构函数，它们有相应的输出，见样例。
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：
数据成员int grade，表示学生所在年级。
构造函数和析构函数，它们有相应的输出，见样例。
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.
HINTAppend Codeappend.cc,

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
class Person{
public:
    Person(string s,int a):name(s),age(a){cout<<"A person "<<name<<" whose age is "<<age<<" is created."<<endl;}
//    Base(const Base&p){a=p.a;cout<<"Base = "<<a<<" is copied."<<endl;}
    ~Person(){cout<<"A person "<<name<<" whose age is "<<age<<" is erased."<<endl;}
    void show(){cout<<"Name is "<<name<<" and age is "<<age<<"."<<endl;}
private:
    string name;
    int age;
};
class Student:public Person{
private:
    int grade;
 
public:
    Student(string s,int a,int g):Person(s,a),grade(g){cout<<"A student whose grade is "<<grade<<" is created."<<endl;}
//    Derived(const Derived &p):Base(p){b=p.b;cout<<"Derived = "<<b<<" is copied."<<endl;}
    ~Student(){cout<<"A student whose grade is "<<grade<<" is erased."<<endl;}
    void show(){cout<<"Grade is "<<grade<<"."<<endl;}
};
int main()
{
    string n;
    int a, g;
    cin>>n>>a>>g;
    Student student(n, a, g);
    student.Person::show();
    student.show();
    return 0;
}
在这里插入代码片