C++_数字时钟

利用C++语言基础，制作了一个模拟电子时钟的程序。

#include<iostream>
#include<windows.h> //延时与清屏头文件 
using namespace std;
class time
{
    public:
        time(){year=0;month=0;day=0;hour=0;minute=0;sec=0;}//默认构造函数 
        time(int y,int mo,int d,int h ,int m,int s):year(y),month(mo),day(d),hour(h),minute(m),sec(s){}//构造函数重载 
        time operator++();//声明运算符重载成员函数 
        void display()
            {
                cout<<"*********"<<year<<"-"<<month<<"-"<<day<<"**********"<<endl;
                cout<<"********"<<hour<<" : "<<minute<<" : "<<sec<<"********"<<endl;
            }//输出时间格式 
    private:
        int year;
        int month;
        int day;
        int hour;
        int minute;
        int sec;    
};
time time::operator++()//定义运算符重载成员函数 
{
    if(++sec>=60)
    {
        sec-=60;
        ++minute;
        if(minute>=60)
        {
            minute-=60;
            ++hour;
            if(hour>=24)
                {
                    hour-=24;
                    ++day;
                    if(day>=30)
                    {
                        day-=30;
                        ++month;
                        if(month>=12)
                        {
                            month-=12;
                            ++year;
                        }
                    }
                }
        }
    }
    return *this;//返回当前对象值 
}
int main()
{
    int a,b,c,e,f,g,h;
    cout<<"请修改当前时间：（格式如下）
";
    cout<<"2018 10 3 12 50 45
";
    {
    cout<<"请输入当前年份(2018):"<<endl;
    cin>>g;
    cout<<"请输入当前月份(1~12):"<<endl; 
    cin>>e;
    cout<<"请输入当前几号(1~30):"<<endl;
    cin>>h;
    cout<<"请输入现在时间(12 30 32):"<<endl;
    cin>>a>>b>>c;
    }
    
    {
        time time1(g,e,h,a,b,c);//如何向time1中输入数据 
        for(int i=0;;i++)
        {    cout<<"*****欢迎进入家庭计时系统*****"<<endl;
            cout<<"*******假设每个月30天*******"<<endl; 
            ++time1;
            time1.display() ;
            cout<<"***********designed by yuumoz.
";
            Sleep(1000);
             system("CLS");
        }
    }
    return 0;
 }