Question

C++

3. Day of the Year Modification

Modify the DayOfYear class, written in an earlier Programming Challenge, to add a

constructor that takes two parameters: a string representing a month and an integer in the

range 0 through 31 representing the day of the month. The constructor should then initialize

the integer member of the class to represent the day specified by the month and day of month

parameters. The constructor should terminate the program with an appropriate error

message if the number entered for a day is outside the range of days for the month given.

Add the following overloaded operators:

++ prefix and postfix increment operators. These operators should modify the DayOfYear

object so that it represents the next day. If the day is already the end of the year, the

new value of the object will represent the first day of the year.

-- prefix and postfix decrement operators. These operators should modify the DayOfYear

object so that it represents the previous day. If the day is already the first day of the

year, the new value of the object will represent the last day of the year.

Answer 1

DayofYear.cpp

#include<stdio.h>
#include<iostream>
#include<stdlib.h>
using namespace std;
class DayOfYear
{
private:
int year;
int day;
string month;
int count=0;
public:
DayOfYear& operator ++();
DayOfYear& operator --();
public:
DayOfYear(char month[], int day)
   {
       for(int i=0;i<12;i++)
       {
           if(month_names(i) == month)
           {
               if( day > 0 && day <= month_days(i))
               {
                   this->month = month;
                   this->day = day;
                   year =0;
                   for(int j=0;j<count;j++)
                   {
                       year=year+ month_days(j);
                   }
                   year=year+day;
                   cout<<"The Day Of The Year is:"<<year<<endl;
               }
               else
               {
                   cout<<"Incorrect date or Day"<<endl;
                   exit(0);
               }
              
           }
           count++;
       }
   }
   public:
   string month_names(int month_number)
   {
       string month_names[] ={"January","February","March","April", "May","June","July","August","September","October","November","December"};
       return month_names[month_number];
   }
   public:
   int month_days(int month_number)
   {
       int month_days[]={31,28,31,30,31,30,31,31,30,31,30,31};
       return month_days[month_number];
   }
};
int main()
{
   char month[12];
   int day;
   cout<<"-------------------------------------"<<endl;
   cout<<"Day of The Year Modification"<<endl;
   cout<<"Enter The Month of Year:"<<endl;
   cin>>month;
   cout<<"Enter the Day Of The Month"<<endl;
   cin>>day;
   DayOfYear obj(month,day);
   cout<<"------------End---------------"<<endl;
   return 0;
}