Problem B: Person類與Student類的關系
Description
當然,一個student首先是一個person。是以,Student類是Person類的派生類。請定義Person類,包括:
1. 資料成員string name和int age,分别表示姓名和年齡。
2. 構造函數和析構函數,它們有相應的輸出,見樣例。
3. void show()函數:按照樣例輸出該對象的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. 構造函數和析構函數,它們有相應的輸出,見樣例。
3. void show()函數:按照樣例輸出該對象的grade屬性值。
Input
隻有1行,分為三部分:一個不含空白符的字元串以及兩個整數。
Output
見樣例。
#include <iostream>
#include <string>
using namespace std;
class Person {
private:
string name;
int age;
public:
Person(string s, int a) : name(s), 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 {
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;
}
~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;
}