一帮学生
Description
学生Student类是Person类的子类，而且每个人都有生日，生日是Date类的对象。所以，需要定义如下类：
Date类：拥有年、月、日三个int类型的属性。
Person类：有一个Date类型对象的属性（表示生日）、string类型属性（表示名字），以及一个int类型的静态属性numOfPersons（对象个数）。
Student类：是Person类的子类，并拥有一个int类型属性（表明学生学号），一个int类型的静态属性numOfStudents（对象个数）。
定义上述类的构造、析构函数，并根据样例输出格式输出相应的信息。
Input
第一行整数N>0表示之后有N行输入。
之后的N行，每行包括4个整数、1个字符串，分别表示年、月、日、学号和姓名。
Output
见样例~
Sample Input
3
2010 3 4 1 Tom
2010 3 5 2 Jack
2010 3 6 3 Mary
Sample Output
Date 2010-3-4 is created.
The 1th person Tom whose birthday is 2010-3-4 is created.
The 1th student Tom whose birthday is 2010-3-4 and id is 1 is created.
Date 2010-3-5 is created.
The 2th person Jack whose birthday is 2010-3-5 is created.
The 2th student Jack whose birthday is 2010-3-5 and id is 2 is created.
Date 2010-3-6 is created.
The 3th person Mary whose birthday is 2010-3-6 is created.
The 3th student Mary whose birthday is 2010-3-6 and id is 3 is created.
Student Tom whose birthday is 2010-3-4 and id is 1 is erased.
Person Tom whose birthday is 2010-3-4 is erased.
Date 2010-3-4 is erased.
Student Jack whose birthday is 2010-3-5 and id is 2 is erased.
Person Jack whose birthday is 2010-3-5 is erased.
Date 2010-3-5 is erased.
Student Mary whose birthday is 2010-3-6 and id is 3 is erased.
Person Mary whose birthday is 2010-3-6 is erased.
Date 2010-3-6 is erased.
题目给定代码
int main()
{
int year, month, day, id, i;
string name;
int num;
cin>>num;
Student **students = new Student*[num];
for (i = 0; i < num; i++)
{
cin>>year>>month>>day>>id>>name;
students[i] = new Student(year, month, day, name, id);
}
for (i = 0;i <num; i++)
delete students[i];
delete[] students;
return 0;
}
code:
#include<iostream>
using namespace std;
class Date{
int y;
int m;
int d;
public:
Date(int yy,int mm,int dd){
y=yy;
m=mm;
d=dd;
cout<<"Date "<<y<<"-"<<m<<"-"<<d<<" is created."<<endl;
}
Date(){
y=m=d=0;
}
int getYear(){
return y;
}
int getMonth(){
return m;
}
int getDay(){
return d;
}
~Date(){
cout<<"Date "<<y<<"-"<<m<<"-"<<d<<" is erased."<<endl;
}
void setDate(int yy,int mm,int dd){
y=yy;
m=mm;
d=dd;
cout<<"Date "<<y<<"-"<<m<<"-"<<d<<" is created."<<endl;
}
};
class Person{
protected:
Date bir;
string name;
static int numOfPersons;
public:
Person(int y,int m,int d,string n){
bir.setDate(y,m,d);
name=n;
numOfPersons++;
cout<<"The "<<numOfPersons<<"th person Tom whose birthday is "<<bir.getYear()<<"-"<<bir.getMonth()<<"-"<<bir.getDay()<<" is created."<<endl;
}
virtual ~Person(){
cout<<"Person "<<name<<" whose birthday is "<<bir.getYear()<<"-"<<bir.getMonth()<<"-"<<bir.getDay()<<" is erased."<<endl;
}
};
class Student:public Person{
int id;
static int numOfStudents;
public:
Student(int y,int m,int d,string n,int i):Person(y,m,d,n){
id=i;
numOfStudents++;
cout<<"The "<<numOfStudents<<"th student "<<name<<" whose birthday is "<<bir.getYear()<<"-"<<bir.getMonth()<<"-"<<bir.getDay()<<" and id is "<<id<<" is created."<<endl;
}
~Student(){
cout<<"Student "<<name<<" whose birthday is "<<bir.getYear()<<"-"<<bir.getMonth()<<"-"<<bir.getDay()<<" and id is "<<id<<" is erased."<<endl;
}
};
int Person::numOfPersons=0;
int Student::numOfStudents=0;
int main()
{
int year, month, day, id, i;
string name;
int num;
cin>>num;
Student **students = new Student*[num];
for (i = 0; i < num; i++)
{
cin>>year>>month>>day>>id>>name;
students[i] = new Student(year, month, day, name, id);
}
for (i = 0;i <num; i++)
delete students[i];
delete[] students;
return 0;
}