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97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
//ProjectEuler/C++/Source/Problem6.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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//Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
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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 <cinttypes>
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#include <cmath>
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#include <string>
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#include <sstream>
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#include "Stopwatch.hpp"
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#include "../Headers/Problem.hpp"
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#include "../Headers/Problem6.hpp"
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int Problem6::START_NUM = 1;
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int Problem6::END_NUM = 100;
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Problem6::Problem6() : Problem("Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum."), sumOfSquares(0), squareOfSum(0){
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}
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void Problem6::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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//Run through all numbers and add them to the appropriate sums
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for(int currentNum = START_NUM;currentNum <= END_NUM;++currentNum){
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sumOfSquares += (currentNum * currentNum); //Add the square to the correct variable
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squareOfSum += currentNum; //Add the number to the correct variable for squaring later
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}
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//Square the sum that needs it
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squareOfSum *= squareOfSum;
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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 Problem6::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 difference between the sum of the squares and the square of the sum of all numbers from 1-100 is " << abs(sumOfSquares - squareOfSum);
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return results.str();
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}
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uint64_t Problem6::getSumOfSquares() 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 sumOfSquares;
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}
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uint64_t Problem6::getSquareOfSum() 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 squareOfSum;
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}
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uint64_t Problem6::getDifference() 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 abs(sumOfSquares - squareOfSum);
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}
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