Problem D: Person類與Student類的關係（C++期末）__C++

Problem D: Person類與Student類的關係 Time Limit: 1 Sec   Memory Limit: 128 MB
Submit: 623   Solved: 438
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當然，一個student首先是一個person。所以，Student類是Person類的衍生類別。請定義Person類，包括：

1. 資料成員string name和int age，分別表示姓名和年齡。

2. 建構函式和解構函式，它們有相應的輸出，見範例。

3. void show()函數：按照範例輸出該對象的name和age屬性值。

定義Student類，是Person類的子類：

1. 資料成員int grade，表示學生所在年級。

2. 建構函式和解構函式，它們有相應的輸出，見範例。

3. void show()函數：按照範例輸出該對象的grade屬性值。

Input

只有1行，分為三部分：一個不含空白符的字串以及兩個整數。

Output

見範例。

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; } 

代碼如下：

#include <iostream> #include <iomanip> #include <string> #include<cstring> using namespace std; class Person { public:     string name;     int age; public:     Person(string _name,int _age)     {         name = _name;         age = _age;         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:     int g; public:     Student(string _name,int _age,int _g):Person(_name,_age)     {          g=_g;          cout<<"A student whose grade is "<<g<<" is created."<<endl;     }     void show()     {         cout<<"Grade is "<<g<<"."<<endl;     }     ~Student()     {         cout<<"A student whose grade is "<<g<<" 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; }