Inital commit with existing files

Source/Problem20.cpp

@@ -0,0 +1,103 @@
+//ProjectEuler/C++/Source/Problem20.cpp
+//Matthew Ellison
+// Created: 11-07-18
+//Modified: 07-14-19
+//What is the sum of the digits of 100!?
+//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/myClasses
+//This file contains a header from the gmp library. The library is used for large integers.
+//You can find more information about them at https://gmplib.org/
+//When compiling this file you need to have the gmp library installed as well as linking the libraries to your executable using the -lgmpxx and -lgmp flags
+/*
+	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 <cinttypes>
+#include <string>
+#include <sstream>
+#include "gmpxx.h"
+#include "Stopwatch.hpp"
+#include "../Headers/Problem20.hpp"
+
+
+Problem20::Problem20() : Problem("What is the sum of the digits of 100!?"), num(1), sum(0){
+	//num Starts at 1 because multiplication is performed on it
+	//sum starts at 0 because addition is performed on it
+}
+
+void Problem20::solve(){
+	//If the problem has already been solved do nothing and end the function
+	if(solved){
+		return;
+	}
+
+	//Start the timer
+	timer.start();
+
+	//Run through every number from 1 to 100 and multiply it by the current num
+	for(int cnt = 1;cnt <= 100;++cnt){
+		num *= cnt;
+	}
+
+	//Get a string of the number because it is easier to pull appart the individual characters
+	std::string numString = num.get_str();
+	//Run through every character in the string, convert it back to an integer and add it to the running sum
+	for(unsigned int cnt = 0;cnt < numString.size();++cnt){
+		sum += std::stoi(numString.substr(cnt, 1));
+	}
+
+	//Stop the timer
+	timer.stop();
+
+	//Throw a flag to show the problem is solved
+	solved = true;
+}
+
+std::string Problem20::getString() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	std::stringstream results;
+	//Print the results
+	results << "100! = " << num.get_str()
+			<< "\nThe sum of the digits is: " << sum;
+	return results.str();
+}
+
+mpz_class Problem20::getNumber() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	return num;
+}
+
+std::string Problem20::getNumberString() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	return num.get_str();
+}
+
+uint64_t Problem20::getSum() const{
+	//If the problem hasn't been solved throw an exception
+	if(!solved){
+		throw unsolved();
+	}
+	return sum;
+}