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70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
//ProjectEuler/C++/Headers/Problem19.hpp
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//Matthew Ellison
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// Created: 09-28-18
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//Modified: 07-14-19
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//How many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)?
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/*
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You are given the following information, but you may prefer to do some research for yourself.
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1 Jan 1900 was a Monday.
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Thirty days has September,
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April, June and November.
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All the rest have thirty-one,
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Saving February alone,
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Which has twenty-eight, rain or shine.
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And on leap years, twenty-nine.
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A leap year occurs on any year evenly divisible by 4, but not on a century unless it is divisible by 400.
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*/
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//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/myClasses
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/*
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Copyright (C) 2019 Matthew Ellison
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef PROBLEM19_HPP
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#define PROBLEM19_HPP
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#include <cinttypes>
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#include <string>
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#include "Problem.hpp"
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class Problem19 : public Problem{
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private:
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//Variables
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//An easier way to return the days
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enum DAYS {SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, NUMBER_OF_DAYS, ERROR};
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static unsigned int START_YEAR; //The start year
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static unsigned int END_YEAR; //The stop year
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uint64_t totalSundays; //Keep track of the number of sundays
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//Functions
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//Return the day of the week that the date you pass into it is on
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DAYS getDay(unsigned int month, unsigned int day, unsigned int year);
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//Returns true if the year passed to it is a leap year
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bool isLeapYear(unsigned int year);
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public:
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Problem19();
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virtual void solve();
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virtual std::string getString() const;
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//Returns the total sundays that were asked for
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uint64_t getTotalSundays() const;
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};
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/* Results
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There are 171 Sundays that landed on the first of the months from 1901 to 2000
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It took 4.579 milliseconds to solve this problem.
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*/
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#endif //PROBLEM19_HPP
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