0143928--皮丽莉---第三章C++作业

#include <iostream>
using namespace std;
class Date
{public:
Date(int,int,int);
Date(int,int);
Date(int);
Date();
void display();
private:
int month;
int day;
int year;
};

Date::Date(int m,int d,int y):month(m),day(d),year(y)
{ }

Date::Date(int m,int d):month(m),day(d)
{year=2005;}

Date::Date(int m):month(m)
{day=1;
year=2005;
}

Date::Date()
{month=1;
day=1;
year=2005;
}

void Date::display()
{cout<<month<<"/"<<day<<"/"<<year<<endl;}

int main()
{
Date d1(10,13,2005);
Date d2(12,30);
Date d3(10);
Date d4;
d1.display();
d2.display();
d3.display();
d4.display();
return 0;
}