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Source/Problem3.cpp

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+//ProjectEuler/C++/Source/Problem3.cpp
+//Matthew Ellison
+// Created: 09-28-18
+//Modified: 07-14-19
+//The largest prime factor of 600851475143
+//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/myClasses
+/*
+	Copyright (C) 2019  Matthew Ellison
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+
+#include <vector>
+#include <cinttypes>
+#include <string>
+#include <sstream>
+#include "Stopwatch.hpp"
+#include "Algorithms.hpp"
+#include "../Headers/Problem.hpp"
+#include "../Headers/Problem3.hpp"
+
+
+uint64_t Problem3::GOAL_NUMBER = 600851475143;
+
+Problem3::Problem3() :  Problem("What is the largest prime factor of 600851475143?"){
+
+}
+
+void Problem3::solve(){
+	//If the problem has already been solved do nothing and end the function
+	if(solved){
+		return;
+	}
+	//Start the timer
+	timer.start();
+
+	//Find the factors of GOAL_NUMBER
+	factors = mee::getFactors(GOAL_NUMBER);
+
+	//Stop the timer
+	timer.stop();
+
+	//Throw a flag to show the problem is solved
+	solved = true;
+}
+
+std::string Problem3::getString() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	std::stringstream results;
+	results << "The largest factor of the number " << GOAL_NUMBER << " is " << factors[factors.size() - 1];
+	return results.str();
+}
+
+std::vector<uint64_t> Problem3::getFactors() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	return factors;
+}
+
+uint64_t Problem3::getLargestFactor() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+
+	return *factors.end();
+}
+
+uint64_t Problem3::getGoalNumber() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	return GOAL_NUMBER;
+}