mirror of
https://bitbucket.org/Mattrixwv/projecteulercs.git
synced 2025-12-06 17:23:57 -05:00
92 lines
2.6 KiB
C#
92 lines
2.6 KiB
C#
//ProjectEuler/ProjectEulerCS/src/Problems/Problem2.cs
|
|
//Matthew Ellison
|
|
// Created: 08-23-20
|
|
//Modified: 08-23-20
|
|
//The sum of the even Fibonacci numbers less than 4,000,000
|
|
//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/CSClasses
|
|
/*
|
|
Copyright (C) 2020 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/>.
|
|
*/
|
|
|
|
|
|
|
|
using System.Collections.Generic;
|
|
|
|
|
|
namespace ProjectEulerCS.Problems{
|
|
public class Problem2 : Problem{
|
|
//Variables
|
|
//Static variables
|
|
private const int TOP_NUM = 4000000 - 1; //The largest number that will be checked as a fibonacci number
|
|
//Instance variables
|
|
private int fullSum; //Holds the sum of all the numbers
|
|
public int Sum{
|
|
get{
|
|
if(!solved){
|
|
throw new Unsolved();
|
|
}
|
|
return fullSum;
|
|
}
|
|
}
|
|
|
|
//Functions
|
|
//Constructor
|
|
public Problem2() : base("What is the sum of the even Fibonacci numbers less than 4,000,000?"){
|
|
fullSum = 0;
|
|
}
|
|
//Operational functions
|
|
//Solve the problem
|
|
public override void Solve(){
|
|
//If the problem has already been solved do nothing and end the function
|
|
if(solved){
|
|
return;
|
|
}
|
|
|
|
//Start the timer
|
|
_timer.Start();
|
|
|
|
//Get a list of all fibonacci numbers < 4,000,000
|
|
List<int> fibNums = mee.Algorithms.GetAllFib(TOP_NUM);
|
|
//Step through every element in the list checkint if it is even
|
|
foreach(int num in fibNums){
|
|
//If the number is even add it to the running tally
|
|
if((num % 2) == 0){
|
|
fullSum += num;
|
|
}
|
|
}
|
|
|
|
//Stop the timer
|
|
_timer.Stop();
|
|
|
|
//Throw a flag to show the problem is solved
|
|
solved = true;
|
|
|
|
//Save the results
|
|
_result = "The sum of all even fibonacci numbers <= " + TOP_NUM + " is " + fullSum;
|
|
}
|
|
//Reset the problem so it can be run again
|
|
public override void Reset(){
|
|
base.Reset();
|
|
fullSum = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Results:
|
|
The sum of all even fibonacci numbers <= 3999999 is 4613732
|
|
It took an average of 5.810 microseconds to run this problem through 100 iterations
|
|
*/
|