3. Switching to numeric representation

• Conversion functions such as serial Julian date can help:

  
      #include <iostream>
      int serial_julian_date( int Month, int Day, int Year );
      int serial_2_month( int nDate );
      int serial_2_day( int nDate );
      int serial_2_year( int nDate );
      int main()
      {
          int month = 3;
          int day = 8;
          int year = 2010;
          // Compute serial date
          int serial_date = serial_julian_date( month, day, year );
          // Modify serial date:
          serial_date = serial_date + 100; // add 100 days
          month = serial_2_month( serial_date );
          day = serial_2_day( serial_date );
          year = serial_2_year( serial_date );
          // Display new date in human-friendly format:
          std::cout << month << '/' << day << '/' << year << '\n';
          return 0;
      }