>> friend bool operator<(Date& date1, Date& date2); the function is supposed to compare 2 date objects of the Date class ............................... It is supposed to overload the < operator to compare 2 Date objects. The comparison shall return true only if the Date object on the l

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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C++ program

Hi i need help making the following function,

 

------>>>>>>    friend bool operator<(Date& date1, Date& date2);

the function is supposed to compare 2 date objects of the Date class ...............................

It is supposed to overload the < operator to compare 2 Date objects. The comparison shall return true only  if the Date object on the left represents a date earlier than the Date object on the right. The comparison shall not update 
either Date object. 

please help I provided all my code below:

The following are the 3 libraries of my program

---------------------------------------------------------------------------------------------------------------------------------------------------------

DATE.H file:

#ifndef DATE_H
#define DATE_H
#include <string>
using namespace std;

class Date {
  private:
    string entered_date;
    int month_, day_, year_;
  public:
   Date();
   Date(const string& entered_date);
  friend bool operator<(Date& date1, Date& date2);
  friend istream& operator >>(istream& input, Date& d);
  friend ostream& operator<<(ostream& output,  Date& d);
};

#endif

---------------------------------------------------------------------------------------------------------------------------------------------

DATE.CPP file:

#include <stdlib.h>
#include <string>
#include "Date.h"
using namespace std;


Date::Date(){  
entered_date =  "04/08/2000";
}


istream& operator>>(istream& input, Date& d) {
cout << "Please enter a date in 03/24/1990 format:" << endl;
input >> d.entered_date;

return input;
}


  Date::Date(const string& entered_date) {
    month_ = stoi(entered_date.substr(0, 2));
   day_ = stoi(entered_date.substr(3, 2));
  year_= stoi(entered_date.substr(6));
  cout << month_ << endl << day_ << endl << year_;
  }
  

  ostream& operator<<(ostream& output,  Date& d) {
       d.month_ = stoi(d.entered_date.substr(0, 2));
       d.day_ = stoi(d.entered_date.substr(3, 2));
       d.year_ = stoi(d.entered_date.substr(6));
      //output << d.month_<< endl; 
  
  if((d.month_ == 1 || d.month_ == 01)) {
   output<<"January"<<" "<< d.day_<<" "<<d.year_;
  }
  else if((d.month_ == 2 || d.month_ == 02)) {
  output<<"February"<<" "<<d.day_<<" "<<d.year_;
  }
  else if((d.month_== 3 || d.month_ == 03)) {
   output<<"March"<<" "<<d.day_<<" "<<d.year_;
  }
  else if((d.month_ == 4 || d.month_ == 04)) {
   output<<"April"<<" "<<d.day_<<" "<<d.year_;
  }
  else if((d.month_ == 5 || d.month_ == 05)) {
   output<<"May"<<" "<<d.day_<<" "<<d.year_;
  }
  else if((d.month_ == 6 || d.month_ == 06)) {
   output<<"June"<<" "<<d.day_<<" "<<d.year_;
  }
  else if((d.month_ == 7 || d.month_ == 07)) {
   output<<"July"<<" "<<d.day_<<" "<<d.year_;
  }
  
 else if(d.month_ == 8) {
   output<<"August"<<" "<<d.day_<<" "<<d.year_;
  }
  else if (d.month_ == 9) {
   output<<"September"<<" "<<d.day_<<" "<<d.year_;
  }
  else if (d.month_ == 10) {
   output<<"October"<<" "<<d.day_<<" "<<d.year_;
  }
  else if (d.month_ == 11) {
   output<<"November"<<" "<<d.day_<<" "<<d.year_;
  }
  else if (d.month_ == 12) {
   output<<"December"<<" "<<d.day_<<" "<<d.year_;
  }
  else {
  output << "invalid date entered";
   
  }
  return output;  
  }

---------------------------------------------------------------------------------------------------------------------------------------------------------

MAIN.CPP file:

#include <iostream> 
#include <string> 
#include <cstring>
#include <stdlib.h>
#include "Date.h"
using namespace std;
int main() {

Date date; 
for (int i= 0; i < 3; i++) {
cin >> date; 
cout << date << endl;
  }
return 0;
}

---------------------------------------------------------------------------------------------------------------------------------------------------------

 
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