/// <summary>
/// Show header, initialize virtualMemory, bubble sort poems by incremented segments and log number of exchanges used by each sort
/// </summary>
public void BubbleSortAndLog()
{
// Shows a header in the console similar to the comment at the top of this file
Common_Code.ShowHeader();
// Initializes all virtualMemory locations to -99
Common_Code.VirtualMemoryInit();
// Reads all three of the poems (TCOTLB.txt, RC.txt, GEAH.txt) in textDir (C:\devel\TFiles\)
Week_2_Class.PoemReader();
// Search virtualMemory for the text of the poems and put it in an array
int[] allPoems = GetPoemsInVirtualMemory();
int totalPoemsLength = allPoems.Length;
// Variable to track the number of exchanges used in a sort
int exchanges;
// Sort a segment of allPoems of size 10
exchanges = BubbleSortSegment(allPoems, 10);
// Write the log from the size 10 sort
WriteEfficiencyLog(10, exchanges, Common_Code.bubbleSort);
// Sort and log segments of the array starting at 100 and incrementing by 100 every time (100, 200, 300, etc) up to 2000
for (int i = 100; i <= 2000; i += 100)
{
exchanges = BubbleSortSegment(allPoems, i);
WriteEfficiencyLog(i, exchanges, Common_Code.bubbleSort);
}
bool keepSorting = Common_Code.YesNo("Keep sorting segments from size 2000 to 5927 (may take a few minutes)");
if (keepSorting)
{
// Sort and log segments of the array starting at 2000 and incrementing by 100 every time (2000, 2100, 2200, etc) up to 5900
for (int i = 2000; i <= totalPoemsLength; i += 100)
{
exchanges = BubbleSortSegment(allPoems, i);
WriteEfficiencyLog(i, exchanges, Common_Code.bubbleSort);
}
// Sort the entire array
exchanges = BubbleSort(allPoems);
// Write the log for the full sort
WriteEfficiencyLog(totalPoemsLength, exchanges, Common_Code.bubbleSort);
}
// Write all locations in the sortable source array to log file for debugging
Common_Code.IntArrayLog(allPoems, "AllPoems");
// Write all locations in virtual memory to log file for debugging
Common_Code.VirtualMemoryLog(10, true);
}
/// <summary>
/// Reads all three of the poems (TCOTLB.txt, RC.txt, GEAH.txt) in textDir (C:\devel\TFiles\)
/// </summary>
public static void PoemReader()
{
string poemOneFilePath = string.Format(Common_Code.textDir + Common_Code.theChargeOfTheLightBrigade);
string poemTwoFilePath = string.Format(Common_Code.textDir + Common_Code.richardCory);
string poemThreeFilePath = string.Format(Common_Code.textDir + Common_Code.greenEggsAndHam);
// Reverse array if it hasn't already been reversed
// Order before reverse: GEAH, RC, TCOTLB; After reverse: TCOTLB, RC, GEAH
// Since TCOTLB comes at page 10, and GEAH comes at page 400, it makes more sense to me reversed
if (textFiles[0] == (poemThreeFilePath))
{
Array.Reverse(textFiles);
}
// Test textFiles array elements to ensure they are the correct poems
try
{
if ((textFiles[0] != poemOneFilePath) || (textFiles[1] != poemTwoFilePath) || (textFiles[2] != poemThreeFilePath))
{
Console.WriteLine("{0}", missingFiles);
// Calls method to display "Press enter to continue..." prompt
Common_Code.DisplayFooter();
PoemReader();
}
}
// Spit out an error if the files are missing, then restart PoemReader method
catch (IndexOutOfRangeException e)
{
Console.WriteLine("{0}", e);
Console.WriteLine("{0}", missingFiles);
Common_Code.DisplayFooter();
PoemReader();
}
// Creates 3D virtualMemory array and initializes all locations to -99
Common_Code.VirtualMemoryInit();
// Declaring counters
int pageCount = 0;
int rowCount = 0;
int colCount = 0;
// Declare an int array so loop can tell at what page to start reading each poem
int[] startPoem = Common_Code.GetPoemStartPages();
// Main block for reading poems into memory
try
{
for (int poem = 0; poem <= startPoem.Length;)
{
using (StreamReader readPoem = new StreamReader(textFiles[poem]))
{
while (pageCount < maxPage)
{
// If pageCount is greater than or equal to array element designating appropriate starting page, assign to virtual memory
// Also checks if current startPoem value is not nilPage (already read)
if ((pageCount >= startPoem[poem]) && (colCount < maxCol) && (rowCount < maxRow) && (startPoem[poem] != nilPage))
{
// Assigns to virtualMemory integer array then reads it with (char) cast so they are written as characters
var currentChar = readPoem.Read();
if (currentChar != -1)
{
Common_Code.virtualMemory[pageCount, rowCount, colCount] = currentChar;
}
// If end of file is reached, set current poem to nilPage to designate it as already read, so it does not get read again
// Then, increment poem by 1 and break out of while loop so StreamReader can be set with next poem in textFiles array
if (currentChar == -1)
{
startPoem[poem] = nilPage;
++poem;
break;
}
}
// Increments to next element in the array
if ((colCount < maxCol) && (rowCount < maxRow))
{
++colCount;
}
else if (rowCount < maxRow)
{
++rowCount;
colCount = 0;
}
else if (rowCount == maxRow)
{
++pageCount;
rowCount = 0;
colCount = 0;
}
// Increments pageCount if nothing else is possible to get to the next poem
else if (pageCount <= startPoem[poem])
{
++pageCount;
}
}
// If poem was incremented so textFiles[poem] would be out of range, break out of for loop
if (poem >= textFiles.Length)
{
break;
}
}
}
}
// Catch exceptions from above try block and report some probably useful stuff
// Shouldn't be possible to reach in normal operation, but useful for debugging!
catch (Exception e)
{
Console.WriteLine("{0}", e);
Console.WriteLine("Page: {0}, Row: {1}, Col: {2}", pageCount, rowCount, colCount);
Console.WriteLine("virtualMemory.Length: {0}", Common_Code.virtualMemory.Length);
}
}
/// <summary>
/// Perform sorts (bucket, frequency, bubble) on a page of randomized integers in virtual memory and log their efficiency.
/// </summary>
public static void SortComparisons()
{
Common_Code.ShowHeader();
Common_Code.VirtualMemoryInit();
int pageToTwoDBucketSort = 200;
int pageToFrequencySort = 205;
int pageToBubbleSort = 210;
// Use the default 0 and 1,500,000 as min and max to populate the pages with random numbers.
// Not counting this towards the logCounter value since it's not part of the sorts being performed.
PopulatePage(pageToTwoDBucketSort, minValue, maxValue);
PopulatePage(pageToFrequencySort, minValue, maxValue);
PopulatePage(pageToBubbleSort, minValue, maxValue);
// Increment this value by 1 every time a variable (other than the logCount variable itself) changes.
// Includes variable changes in iterators (e.g. for (int i = 0; i < 100; i++) should increase logCount by 1 for each iteration, for a total of 100).
// Does not include variable declaration/initialization.
int logCount = 0;
// FindMinAndMax() Reassigns minValue and maxValue to whatever the lowest and highest numbers that were generated are (respectively).
// Tracks how many iterations it takes (17 * 80 = 1360) to find the min and max values so it can be added to logCount.
// Also, not every sort uses minValue and maxValue - only Frequency Sort and Bucket Sort, so I'm only increasing logCount by this for those sorts.
int findMinAndMax = FindMinAndMax(pageToTwoDBucketSort);
#region Sorts
#region 2-Dimensional Bucket Sort
// Set logCount to findMinAndMax since BucketSort uses them
logCount += findMinAndMax;
// Get the number of times to log based on operations performed during the bucket sort (i.e. total variable assignments it took to sort).
logCount += TwoDBucketSortPage(pageToTwoDBucketSort);
Week_10_Class.WriteEfficiencyLog(pageSize, logCount, Common_Code.arrayBucketSort);
Console.WriteLine("After bucket sort on page {0}, is it sorted?: {1}", pageToTwoDBucketSort, IsPageSorted(pageToTwoDBucketSort));
Common_Code.DisplayFooter();
#endregion
#region Frequency Sort
// Reset logCount to findMinAndMax for frequency sort.
logCount = findMinAndMax;
logCount += FrequencySortPage(pageToFrequencySort);
Week_10_Class.WriteEfficiencyLog(pageSize, logCount, Common_Code.frequencySort);
Console.WriteLine("After frequency sort on page {0}, is it sorted?: {1}", pageToFrequencySort, IsPageSorted(pageToFrequencySort));
Common_Code.DisplayFooter();
#endregion
#region Bubble Sort
// Reset logCount to 0 for bubble sort.
logCount = 0;
// Get number of times to log based on bubble sort operations.
logCount += LazyBubbleSortPage(pageToBubbleSort);
Week_10_Class.WriteEfficiencyLog(pageSize, logCount, Common_Code.bubbleSort);
Console.WriteLine("After bubble sort on page {0}, is it sorted?: {1}", pageToBubbleSort, IsPageSorted(pageToBubbleSort));
Common_Code.DisplayFooter();
#endregion
#endregion
// Writes locations in virtual memory to a log, excluding -99 (virtualNull), so the sorts can be manually checked for correctness.
Common_Code.VirtualMemoryLog(12, false);
}
/// <summary>
/// Use frequency sort to sort the poems and log the efficiency of the algorithm.
/// </summary>
public static void FrequencySortAndLog()
{
// Shows a header in the console similar to the comment at the top of this file
Common_Code.ShowHeader();
// Initializes all virtualMemory locations to -99
Common_Code.VirtualMemoryInit();
// Reads all three of the poems (TCOTLB.txt, RC.txt, GEAH.txt) in textDir (C:\devel\TFiles\)
Week_2_Class.PoemReader();
// Search virtualMemory for the text of the poems and put it in an array
int[] allPoems = Week_10_Class.GetPoemsInVirtualMemory();
// Set log count to total poem array length, since part of this algorithm is loading the poems into the array.
int logOneCount = allPoems.Length;
// Round the length of allPoems down to nearest 100
// Integer division always rounds down so by dividing by 100 then multiplying by 100 we get the value we want
// Examples:
// 5927 / 100 = 59.27; C# rounds int to 59; 59 * 100 = 5900
// 5977 / 100 = 59.77; C# rounds int to 59; 59 * 100 = 5900
int poemLengthDownToHundred = allPoems.Length / 100 * 100;
// Frequency sort segment of size i
// Increase log count by the number of operations performed by a segment sort of size 10
// 255 represents the size of the frequency counters array (i.e. ASCII values 0-255); Parameter exists in case I want to frequency sort things other than ASCII
logOneCount += FrequencySortSegment(allPoems, 10, 255);
// Write a log file with a 1 for the value of logOneCount
Week_10_Class.WriteEfficiencyLog(10, logOneCount, Common_Code.frequencySort);
// Repeat above processes for segments of size 100, 200, 300...5900, then size allPoems.Length
for (int i = 100;
i <= allPoems.Length;
i = i < poemLengthDownToHundred ? (i + 100) : allPoems.Length)
{
// Set log count to total poem array length, since part of this algorithm is loading the poems into the array.
logOneCount = allPoems.Length;
// Frequency sort a segment of allPoems, segment size: i (100, 200, 300, etc)
// Increase log count by the number of operations performed by that sort
logOneCount += FrequencySortSegment(allPoems, i, 255);
// Write a log file with a 1 for the value of logOneCount
Week_10_Class.WriteEfficiencyLog(i, logOneCount, Common_Code.frequencySort);
// Break out of loop if i == allPoems.Length, otherwise infinite loop
if (i == allPoems.Length)
{
break;
}
// Expanded version of above ? : ternary operation (in for() loop iterator)
//if (i < poemLengthDownToHundred)
//{
// i += 100;
//}
//else
//{
// i = allPoems.Length;
//}
}
// Open the log folder path given in Common_Code.logDir in explorer
Common_Code.OpenLogFolder();
}