What's the anniversary

"What's our 99 days together?"
"Say! How long have we been together today! "
"..."

source program
The original date is initialized directly and can be changed by yourself.

It can realize days statistics and days query between dates.
Blackboard program
I had nothing to write long ago.

#include<iostream>
#include<iomanip>
#include<string>
using namespace std;
int MonthDays[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; 
class Date
{  public:
   Date(int a=3,int b=3,int c=2018);//The initial date is March 3, 2018, constructor; 
   void assign(int a,int b,int c);//Assignment function; 
   void display();//Output function; 
   bool leap_year();//Determine whether it is a leap year (Boolean); 
   void increment(int n);//The date n days after the current date; 
   int accumulate(Date& t);
private:
	int day;
	int month;
	
	int year;
};
int Date::accumulate(Date& t)
{ int sum,n1,n2;

    n1=MonthDays[month]-day;
    
   while(t.year>year)// Are the two dates "year" the same 
   {     if(leap_year()==0)  
             MonthDays[2]=28;
         else
             MonthDays[2]=29;
 
    for(int i=month;i<12;i++)
    { n1+=MonthDays[i+1];
	}
     year+=1;
     month=0;
   } 
   
    if(leap_year()==0) //In the same year; 
         MonthDays[2]=28;
    else
         MonthDays[2]=29; 
      if(t.month>month)//Not in the same month; 
    { 
     for(int i=month;i<t.month-1;i++)
     { n1+=MonthDays[i+1];
	 }
	 n1+=t.day;
      }
    else
    n1=t.day-day;

	 return n1;
 } 
Date::Date(int a,int b,int c)//Constructor; 
{  day=a;
   month=b;
   year=c;
}
void Date::assign(int a,int b,int c)//Assignment function; 
{  day=a;
   month=b;
   year=c;
}
void Date::display()//Output function; 
{  cout<<year<<"/"<<month<<"/"<<day<<endl;
   cout<<"========================"<<endl;
}
bool Date::leap_year() //Function to determine whether it is a leap year; 
{  return(year%4==0&&year%100!=0)||(year%400==0);//Judgment conditions of leap year; 
}
void Date::increment(int n) //Function to calculate the date after n days; 
{  
	while(n>=31)//The number of days added is more than one month; 
   
{  
	if(leap_year()==0)//Not a leap year; 
{   MonthDays[2]=28;
	n=n-MonthDays[month];
    month+=1;
    if(month>12)
	{month=month-12;
	year+=1;}
	}	   
 else//Is a leap year; 
	   {if(month<3)
     MonthDays[2]=29;
		n=n-MonthDays[month];
    month+=1;
    if(month>12)
	{month=month-12;
	year+=1;}
	}
	
}
 
	   if(leap_year()==0)
	{  MonthDays[2]=28;
	   day=day+n;
   if(day>MonthDays[month])
   {day=day-MonthDays[month];
   month+=1;
   if(month>12)
   {month=month-12;
    year+=1;}
   }
	}
      else
	  { if(month<3)
     MonthDays[2]=29;
	   day=day+n;
   if(day>MonthDays[month])
   {day=day-MonthDays[month];
   month+=1;
   if(month>12)
   {month=month-12;
    year+=1;}
   }
} }  
int main()
{  
    int n,a1,b1,c1,a2,b2,c2,a; 
    /*date1.display();//Output initialization; 
    date2.display();//Output March 3, 2018;*/
    cout<<"Dear user, the default date is 2018.3.3"<<endl<<endl<<endl<<endl<<endl; 
	char m='y';
	while(m=='y')
  {  Date date1, date2(3,3,2018),date3,date4;
    cout<<"☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆"<<endl<<endl;
    cout<<"1.Find interval days 2.Seek addition n Days after"<<endl<<endl;
	cout<<"☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆"<<endl<<endl<<endl;
	cout<<"Select a task to perform:";cin>>a;
	if(a==1) 
	{
	cout<<"Please enter another date:(year/month/day)"<<endl; 
    cin>>a2>>b2>>c2;//Enter another date; 
    date4.assign(c2,b2,a2);
    cout<<"------------------------"<<endl; 
    cout<<"The days between are:"; 
    cout<<date2.accumulate(date4)<<endl;//Days between calculations; 
    cout<<"========================"<<endl;}
    if(a==2)
    {
    cout<<"Please enter the initial date:(year/month/day)"<<endl; 
	cin>>a1>>b1>>c1;//Enter a date; 
    date3.assign(c1,b1,a1);
	cout<<"------------------------"<<endl; 
    cout<<"Please enter the number of days:"<<endl; 
	cin>>n;//Enter a day; 
    date3.increment(n);//The date after which the number of days is calculated;
	cout<<"The accumulated date is:(year/month/day)"<<endl; 
    date3.display();//Display the date after the number of days;
	}
	cout<<"★★★★★★★★★★★★"<<endl;
    cout<<"========================"<<endl;
	cout<<"Do you want to continue? ( y/n)"<<endl;
	cin>>m; 
}
    return 0;  

}

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Private letter follow

Posted on Sat, 07 Mar 2020 08:05:39 -0800 by ERuiz