diff --git a/src/Problems.rs b/src/Problems.rs
index 164152b..058470e 100644
--- a/src/Problems.rs
+++ b/src/Problems.rs
@@ -48,3 +48,4 @@ pub mod Problem22;
pub mod Problem23;
pub mod Problem24;
pub mod Problem25;
+pub mod Problem26;
diff --git a/src/Problems/Problem26.rs b/src/Problems/Problem26.rs
new file mode 100644
index 0000000..51e4ed0
--- /dev/null
+++ b/src/Problems/Problem26.rs
@@ -0,0 +1,92 @@
+//ProjectEulerRust/src/Problems/Problems26.rs
+//Matthew Ellison
+// Created: 06-17-20
+//Modified: 06-17-20
+//Find the value of d < 1000 for which 1/d contains the longest recurring cycle in its decimal fraction part.
+//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/RustClasses
+/*
+ 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 .
+*/
+
+
+extern crate myClasses;
+use crate::Problems::Answer::Answer;
+
+pub fn getDescription() -> String{
+ "Find the value of d < 1000 for which 1/d contains the longest recurring cycle in its decimal fraction part.".to_string()
+}
+
+pub fn solve() -> Answer{
+ let TOP_NUM = 999;
+ //The length of the longest cycle
+ let mut longestCycle = 0;
+ //The starting denominator of the longest cycle
+ let mut longestNumber = 0;
+
+ //Start the timer
+ let mut timer = myClasses::Stopwatch::Stopwatch::new();
+ timer.start();
+
+ //Start with 1/2 and find out how long the longest cycle is by checking the remainders
+ //Loop through every number from 2-999 and use it for the denominator
+ for denominator in 2..=TOP_NUM{
+ let mut denomList = Vec::::new();
+ let mut endFound = false; //Whether we have found an end to the number (either a cycle or a 0 for remainder)
+ let mut cycleFound = false; //Whether a cycle was detected
+ let mut numerator = 1; //The numerator that will be divided. Always starts at 1
+ while(!endFound){
+ //Get the remainder after the division
+ let remainder = numerator % denominator;
+ //Check if the remainder is 0
+ //If it is set the flag
+ if(remainder == 0){
+ endFound = true;
+ }
+ //Check if the remainder is in the list
+ //If it is in the list, set the appropriate flags
+ else if(denomList.contains(&remainder)){
+ endFound = true;
+ cycleFound = true;
+ }
+ //Else add it to the list
+ else{
+ denomList.push(remainder);
+ }
+ //Multiply the remainder by 10 to continue finding the next remainder
+ numerator = remainder * 10;
+ }
+ //If a cycle was found check the size of the list against the largest cycle
+ if(cycleFound){
+ //If it is larger than the largest, set it as the new largest
+ if(denomList.len() > longestCycle){
+ longestCycle = denomList.len();
+ longestNumber = denominator;
+ }
+ }
+ }
+
+ //Stop the timer
+ timer.stop();
+
+ //Return the results
+ return Answer::new(format!("The longest cycle is {} digits long\nIt started with the number {}", longestCycle, longestNumber), timer.getString());
+}
+
+/* Results:
+The longest cycle is 982 digits long
+It started with the number 983
+It took 6.518 milliseconds to solve this problem
+*/
diff --git a/src/main.rs b/src/main.rs
index 8ce278d..478a2c2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -33,9 +33,9 @@ mod Problems;
#[derive(PartialEq)]
enum Selections{EMPTY, SOLVE, DESCRIPTION, LIST, EXIT, SIZE}
-static problemNumbers: [u32; 26] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+static problemNumbers: [u32; 27] = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
- 20, 21, 22, 23, 24, 25];
+ 20, 21, 22, 23, 24, 25, 26];
fn main(){
let mut selection = Selections::EMPTY;
@@ -232,6 +232,10 @@ fn solveProblem(problemNumber: u32){
println!("{}", Problems::Problem25::getDescription());
println!("{}", Problems::Problem25::solve());
}
+ else if(problemNumber == 26){
+ println!("{}", Problems::Problem26::getDescription());
+ println!("{}", Problems::Problem26::solve());
+ }
}
fn descriptionMenu(){
//Give some extra space to print the description
@@ -332,6 +336,9 @@ fn printDescription(problemNumber: u32){
else if(problemNumber == 25){
println!("{}", Problems::Problem25::getDescription());
}
+ else if(problemNumber == 26){
+ println!("{}", Problems::Problem26::getDescription());
+ }
}
fn getProblemNumber() -> u32{
println!("Enter a problem number: ");