定义一个带重载构造函数的日期类 代码参考

#include <iostream>

using namespace std;

class Date
{
    private:
        int year;
        int month;
        int day;
    public:
        Date(){year=1900;month=1;day=1;}
        Date(int,int,int);
        void Show();
        void Init(int,int,int);
};

Date::Date(int a, int b, int c)
{
    year=a;
    month=b;
    day=c;
}

void Date::Show()
{
    cout<<year<<'-'<<month<<'-'<<day<<endl;
    return;
}

void Date::Init(int a, int b, int c)
{
    year=a;
    month=b;
    day=c;
    return;
}

int main()
{
    Date d1,d2(2100,12,12);
    int a,b,c;
    cin>>a>>b>>c;
    d1.Show();
    d2.Show();
    d1.Init(a,b,c);
    d1.Show();
    return 0;
}