Problem B: 一帮学生
Problem B: 一帮学生
Time Limit: 1 Sec Memory Limit: 128 MBSubmit: 788 Solved: 427
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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:
1. Date类:拥有年、月、日三个int类型的属性。
2. 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)。
3. 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
32010 3 4 1 Tom2010 3 5 2 Jack2010 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.
HINT
Append Code
#include <iostream>
#include <algorithm>
using namespace std;
class Date
{
public:
int year,month,date;
Date(int year,int month,int date):year(year),month(month),date(date){cout<<"Date "<<year<<"-"<<month<<"-"<<date<<" is created."<<endl;}
~Date(){cout<<"Date "<<year<<"-"<<month<<"-"<<date<<" is erased."<<endl;}
};
class Person
{
public:
Date birthday;
string name;
static int numOfPersons;
Person(int year,int month,int date,string _name):birthday(year,month,date)
{
name = _name;
numOfPersons++;
cout<<"The "<<numOfPersons<<"th person "<<name<<" whose birthday is "<<year<<"-"<<month<<"-"<<date<<" is created."<<endl;
}
~Person(){cout<<"Person "<<name<<" whose birthday is "<<birthday.year<<"-"<<birthday.month<<"-"<<birthday.date<<" is erased."<<endl;}
};
int Person::numOfPersons = 0;
class Student : public Person
{
public:
static int numOfStudents;
int num;
Student(int year,int month,int date,string name,int _num):Person(year,month,date,name)
{
num = _num;
numOfStudents++;
cout<<"The "<<numOfPersons<<"th student "<<name<<" whose birthday is "<<year<<"-"<<month<<"-"<<date<<" and id is "<<num<<" is created."<<endl;
}
~Student(){cout<<"Student "<<name<<" whose birthday is "<<birthday.year<<"-"<<birthday.month<<"-"<<birthday.date<<" and id is "<<num<<" is erased."<<endl;}
};
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;
}