Write a complete C++ program that implements this Date class (written below), wi

Question

Write a complete C++ program that implements this Date class (written below), with the modifications and improvements outlined below.  DO NOT SOLICIT services--if you cannot answer the question, do not respond I will report you.

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#include <iostream>
#include <cmath>

using namespace std;

class Date
{    public:
        Date (int = 1, int = 1, int = 1990);        //default constructor with parameters
        void print( ) const;
    private:
        int month;
        int day;
        int year;
};

Date :: Date (int m, int d, int y)
{
    month = m;        //note no error checking is performed at all Write a complete C++ program that implements this Date class (written below), with the modifications and improvements outlined below.  DO NOT SOLICIT services--if you cannot answer the question, do not respond I will report you.

_________________________________________________________________________________________________


#include <iostream>
#include <cmath>

using namespace std;

class Date
{    public:
        Date (int = 1, int = 1, int = 1990);        //default constructor with parameters
        void print( ) const;
    private:
        int month;
        int day;
        int year;
};

Date :: Date (int m, int d, int y)
{
    month = m;        //note no error checking is performed at all

Explanation / Answer

here is the code:-

#include<iostream>
#include<cstring>
using namespace std;
class date{
int month,day,year;
bool leapyear(int);
bool end_of_month(int);
static const int date1[];
public:
void setdate(int m,int d,int y)
{
      month=m;
      day=d;
      year=y;
}
date()
{
      month=1;
      day=1;
      year=1990;
}
void nextday();
void preday();
void afteradd(int);
void compare(date,date);
friend istream& operator>>(istream &,date &);
friend ostream& operator<<(ostream &,date &);
};
void printopt();
int getopt();
const int date::date1[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};

istream& operator>>(istream &i,date &i1)
{
    int y,m,d;
    cout<<"enter date in m:d:y"<<endl;
    i>>m>>d>>y;
    i1.setdate(m,d,y);
}
ostream& operator<<(ostream &i,date &i1)
{
    int y,m,d;
    cout<<"date in m:d:y is"<<endl;
    i<<i1.month<<":"<<i1.day<<":"<<i1.year;
    return i;
}
void date::nextday()
{
    if(month>13)
         cout<<"invalid month"<<endl;
    else if(!end_of_month(day))
      {
          day++;
          cout<<month<<":"<<day<<":"<<year<<endl;
      }
    else if(month<=12 && day<date1[month])
      {
        
          day++;
             cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
      }
    else if(day==date1[month]&& month==12)
      {
         month=1;
         day=1;
         year++;
           cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
      }
   else if(day==date1[month])
      {
         month++;
         day=1;
           cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
      }
     else
      {
         year++;
         month=1;
         day=1;
           cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
      }
}

bool date::end_of_month(int tday)
{
     if(month==2 && leapyear(year))
           return tday=29;
     else
           return tday;
}
bool date::leapyear(int year)
{
    if(year%4==0)
       return 1;
    else
      return 0;
}
void date::preday()
{
   if(day!=1)
    {
       day--;
         cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
     }
    else if(month==1 && day==1)
     {
          year--;
          month=12;
          day=31;
             cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
     }
   else if(month==3 && day==1 && leapyear(year))
  {
      day=29;
      month--;
        cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
    }
   else
    {
       month--;
       day=date1[month];
         cout<<"year"<<year<<"month"<<month<<"day"<<day<<endl;
    }
}
void date::afteradd(int a)
{
   for(int i=0;i<a;i++)
       nextday();
}
void date::compare(date d1,date d2)
{
    if(d1.year==d2.year && d1.month==d2.month && d1.day== d2.day)
       cout<<"date's are equal"<<endl;
    else
       cout<<"date's are not equal"<<endl;
}
int main()
{
    date d1,d2;
    int year,month,day;
    int opt,x;
     while(1)
      {
           printopt();
           opt=getopt();
            switch(opt)
            {
                 case 0:exit(0);
                 case 1:
                          d1.nextday();
                     
                         break;
                 case 2:d1.preday();
                         
                         break;
                 case 3:d1.compare(d1,d2);
                         break;
                case 4:cout<<"enter value to inc date:"<<endl;
                        cin>>x;
                        d1.afteradd(x);
                        
                         break;
                 case 5:cin>>d1;
                        cin>>d2;
                         break;
                case 6:cout<<d1<<endl;
                       cout<<d2<<endl;
                        break;
             }
       }
return 0;
}
void printopt()
{
   cout<<"0.exit"<<endl;
   cout<<"1.next"<<endl;
   cout<<"2.pre"<<endl;
   cout<<"3.compare"<<endl;
    cout<<"4.afteradd"<<endl;
     cout<<"5.read"<<endl;
      cout<<"6.print"<<endl;
}
int getopt()
{
   int opt;
   cout<<"enter for option"<<endl;
   cin>>opt;
   return opt;
}

the above is compiled without any errors and gives the requied ouput.............

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