date.h

#ifndef DATE_H
#define DATE_H


#include <iostream>
#include <chrono>
#include <ctime>
#include <sstream>

struct Date { 
   int d, m, y; 
}; 


const int monthDays[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 

int countLeapYears(Date d) { 
   int years = d.y; 
   if (d.m <= 2) years--; 
   return years / 4 - years / 100 + years / 400; 
} 

int getDifference(Date dt1, Date dt2) { 
   long int n1 = dt1.y * 365 + dt1.d; 
   for (int i = 0; i < dt1.m - 1; i++) 
       n1 += monthDays[i]; 
   n1 += countLeapYears(dt1); 

   long int n2 = dt2.y * 365 + dt2.d; 
   for (int i = 0; i < dt2.m - 1; i++) 
       n2 += monthDays[i]; 
   n2 += countLeapYears(dt2); 

   return (n2 - n1); 
} 

void parse_date(const std::string& s, int& day, int& month, int& year) {
  std::stringstream stream(s);
  std::string part;
  if (std::getline(stream, part, '-')) {
     day = std::stoi(part);
  }
  if (std::getline(stream, part, '-')) {
     month = std::stoi(part);
  }
  if (std::getline(stream, part, '-')) {
     year = std::stoi(part);
  }
}


#endif