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93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
//ProjectEuler/C++/Source/Problem3.cpp
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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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//The largest prime factor of 600851475143
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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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#include <vector>
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#include <cinttypes>
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#include <string>
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#include <sstream>
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#include "Stopwatch.hpp"
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#include "Algorithms.hpp"
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#include "../Headers/Problem.hpp"
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#include "../Headers/Problem3.hpp"
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uint64_t Problem3::GOAL_NUMBER = 600851475143;
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Problem3::Problem3() : Problem("What is the largest prime factor of 600851475143?"){
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}
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void Problem3::solve(){
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//If the problem has already been solved do nothing and end the function
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if(solved){
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return;
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}
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//Start the timer
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timer.start();
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//Find the factors of GOAL_NUMBER
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factors = mee::getFactors(GOAL_NUMBER);
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//Stop the timer
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timer.stop();
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//Throw a flag to show the problem is solved
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solved = true;
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}
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std::string Problem3::getString() const{
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//If the problem hasn't been solved throw an exception
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if(!solved){
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throw unsolved();
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}
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std::stringstream results;
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results << "The largest factor of the number " << GOAL_NUMBER << " is " << factors[factors.size() - 1];
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return results.str();
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}
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std::vector<uint64_t> Problem3::getFactors() const{
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//If the problem hasn't been solved throw an exception
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if(!solved){
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throw unsolved();
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}
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return factors;
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}
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uint64_t Problem3::getLargestFactor() const{
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//If the problem hasn't been solved throw an exception
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if(!solved){
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throw unsolved();
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}
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return *factors.end();
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}
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uint64_t Problem3::getGoalNumber() const{
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//If the problem hasn't been solved throw an exception
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if(!solved){
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throw unsolved();
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}
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return GOAL_NUMBER;
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}
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