我已经创建了一个C＃控制台应用程序，用户可以在其中输入任意大小的数字，然后允许用户选择他们希望程序如何找出数字是多少 - 使用单核或多核芯
该程序似乎工作正常，但测试表明使用这两个选项的精确数字10,000,000似乎会产生更长的多线程选项持续时间。有人可以对此有所了解。
更新：
在花了一些时间研究并遵循接受的答案之后，我实施了一些重大更改，这些更改涉及计数器变量迭代期间的密集计算，这会推动处理器确定输入的数字。在这种情况下，多线程操作可以显着提高速度。
基于WPF应用程序的修订代码如下：
using System;
using System.Windows;
using System.Windows.Controls;
using System.Threading;
using System.Diagnostics;
using System.ComponentModel;
using System.Text.RegularExpressions;
namespace C_Sharp_Programming_Portfolio
{
public partial class Multithreading : Page
{
/* Variable declarations */
static string numberTextToEncrypt;
static double numberDoubleToEncrypt;
static bool areaCodeCheck;
static int areaCodeLength;
static int noCores;
static double[] from = new Double[Environment.ProcessorCount];
static double[] to = new Double[Environment.ProcessorCount];
static string areaConfirmed;
static string completionTime;
static string coresUsed;
static string correctNumber;
static string numberTextToDecrypt;
Stopwatch watch = new Stopwatch();
/* Stores the divisible number following dividing the telephone number by the number of cores */
static double valuePerThread;
/* Stores the divisible number following dividing the telephone number by the number of cores, later
used for setting the values for each core to check telephone number entered*/
static double difference;
/* Create two read only arrays and store area codes and region names */
static readonly double[] areaCodes = { 0113, 0114, 0115, 0116, 0117, 0118, 01200, 01202, 01204, 01205, 01206, 01207, 01208, 01209, 0121, 01223, 01224, 01225, 01226, 01227, 01228, 01229, 01233, 01234, 01235, 01236, 01237, 01239, 01241, 01242, 01243, 01244, 01245, 01246, 01248, 01249, 01250, 01252, 01253, 01254, 01255, 01256, 01257, 01258, 01259, 01260, 01261, 01262, 01263, 01264, 01267, 01268, 01269, 01270, 01271, 01273, 01274, 01275, 01276, 01277, 01278, 01279, 01280, 01282, 01283, 01284, 01285, 01286, 01287, 01288, 01289, 01290, 01291, 01292, 01293, 01294, 01295, 01296, 01297, 01298, 01299, 01300, 01301, 01302, 01303, 01304, 01305, 01306, 01307, 01308, 01309, 0131, 01320, 01322, 01323, 01324, 01325, 01326, 01327, 01328, 01329, 01330, 01332, 01333, 01334, 01335, 01337, 01339, 01340, 01341, 01342, 01343, 01344, 01346, 01347, 01348, 01349, 01350, 01352, 01353, 01354, 01355, 01356, 01357, 01358, 01359, 01360, 01361, 01362, 01363, 01364, 01366, 01367, 01368, 01369, 01371, 01372, 01373, 01375, 01376, 01377, 01379, 01380, 01381, 01382, 01383, 01384, 01386, 01387, 013873, 01388, 01389, 01392, 01394, 01395, 01397, 01398, 01400, 01403, 01404, 01405, 01406, 01407, 01408, 01409, 0141, 01420, 01422, 01423, 01424, 01425, 01427, 01428, 01429, 01430, 01431, 01432, 01433, 01434, 01435, 01436, 01437, 01438, 01439, 01440, 01442, 01443, 01444, 01445, 01446, 01449, 01450, 01451, 01452, 01453, 01454, 01455, 01456, 01457, 01458, 01460, 01461, 01462, 01463, 01464, 01465, 01466, 01467, 01469, 01470, 01471, 01472, 01473, 01474, 01475, 01476, 01477, 01478, 01479, 01480, 01481, 01482, 01483, 01484, 01485, 01487, 01488, 01489, 01490, 01491, 01492, 01493, 01494, 01495, 01496, 01497, 01499, 01501, 01502, 01503, 01505, 01506, 01507, 01508, 01509, 0151, 01520, 01522, 01524, 015242, 01525, 01526, 01527, 01528, 01529, 01530, 01531, 01534, 01535, 01536, 01538, 01539, 015394, 015395, 015396, 01540, 01542, 01543, 01544, 01545, 01546, 01547, 01548, 01549, 01550, 01553, 01554, 01555, 01556, 01557, 01558, 01559, 01560, 01561, 01562, 01563, 01564, 01565, 01566, 01567, 01568, 01569, 01570, 01571, 01572, 01573, 01575, 01576, 01577, 01578, 01579, 01580, 01581, 01582, 01583, 01584, 01586, 01588, 01590, 01591, 01592, 01593, 01594, 01595, 01597, 01598, 01599, 01600, 01603, 01604, 01606, 01608, 01609, 0161, 01620, 01621, 01622, 01623, 01624, 01625, 01626, 01628, 01629, 01630, 01631, 01633, 01634, 01635, 01636, 01637, 01638, 01639, 01641, 01642, 01643, 01644, 01646, 01647, 01650, 01651, 01652, 01653, 01654, 01655, 01656, 01659, 01661, 01663, 01664, 01665, 01666, 01667, 01668, 01669, 01670, 01671, 01672, 01673, 01674, 01675, 01676, 01677, 01678, 01680, 01681, 01683, 01684, 01685, 01686, 01687, 01688, 01689, 01690, 01691, 01692, 01694, 01695, 01697, 016973, 016974, 016977, 01698, 01700, 01702, 01704, 01706, 01707, 01708, 01709, 01720, 01721, 01722, 01723, 01724, 01725, 01726, 01727, 01728, 01729, 01730, 01732, 01733, 01736, 01737, 01738, 01740, 01743, 01744, 01745, 01746, 01747, 01748, 01749, 01750, 01751, 01752, 01753, 01754, 01756, 01757, 01758, 01759, 01760, 01761, 01763, 01764, 01765, 01766, 01767, 01768, 017683, 017684, 017687, 01769, 01770, 01771, 01772, 01773, 01775, 01776, 01777, 01778, 01779, 01780, 01782, 01784, 01785, 01786, 01787, 01788, 01789, 01790, 01792, 01793, 01794, 01795, 01796, 01797, 01798, 01799, 01803, 01805, 01806, 01807, 01808, 01809, 01821, 01822, 01823, 01824, 01825, 01827, 01828, 01829, 01830, 01832, 01833, 01834, 01835, 01837, 01838, 01840, 01841, 01842, 01843, 01844, 01845, 01847, 01848, 01851, 01852, 01854, 01855, 01856, 01857, 01858, 01859, 01862, 01863, 01864, 01865, 01866, 01869, 01870, 01871, 01872, 01873, 01874, 01875, 01876, 01877, 01878, 01879, 01880, 01882, 01883, 01884, 01885, 01886, 01887, 01888, 01889, 01890, 01892, 01895, 01896, 01899, 01900, 01902, 01903, 01904, 01905, 01908, 01909, 0191, 01920, 01922, 01923, 01924, 01925, 01926, 01928, 01929, 01931, 01932, 01933, 01934, 01935, 01937, 01938, 01939, 01942, 01943, 01944, 01945, 01946, 019467, 01947, 01948, 01949, 01950, 01951, 01952, 01953, 01954, 01955, 01957, 01959, 01962, 01963, 01964, 01967, 01968, 01969, 01970, 01971, 01972, 01974, 01975, 01977, 01978, 01980, 01981, 01982, 01983, 01984, 01985, 01986, 01987, 01988, 01989, 01992, 01993, 01994, 01995, 01997, 020, 023, 024, 028, 029 };
static readonly string[] regions = { "Leeds", "Sheffield", "Nottingham", "Leicester", "Bristol", "Reading", "Clitheroe", "Bournemouth", "Bolton", "Boston", "Colchester", "Consett", "Bodmin", "Redruth", "Birmingham", "Cambridge", "Aberdeen", "Bath", "Barnsley", "Canterbury", "Carlisle", "Barrow-in Furness / Millom", "Ashford (Kent)", "Bedford", "Abingdon", "Coatbridge", "Bideford", "Cardigan", "Arbroath", "Cheltenham", "Chichester", "Chester", "Chelmsford", "Chesterfield", "Bangor (Gwynedd)", "Chippenham", "Blairgowrie", "Aldershot", "Blackpool", "Blackburn", "Clacton-on-Sea", "Basingstoke", "Coppull", "Blandford", "Alloa", "Congleton", "Banff", "Bridlington", "Cromer", "Andover", "Carmarthen", "Basildon", "Ammanford", "Crewe", "Barnstaple", "Brighton", "Bradford", "Clevedon", "Camberley", "Brentwood", "Bridgwater", "Bishops Stortford", "Buckingham", "Burnley", "Burton-on-Trent", "Bury-St-Edmunds", "Cirencester", "Caernarfon", "Guisborough", "Bude", "Berwick-on-Tweed", "Cumnock", "Chepstow", "Ayr", "Crawley", "Ardrossan", "Banbury", "Aylesbury", "Axminster", "Buxton", "Bewdley", "Cerne Abbas", "Arrochar", "Doncaster", "Folkestone", "Dover", "Dorchester", "Dorking", "Forfar", "Bridport", "Forres", "Edinburgh", "Fort Augustus", "Dartford", "Eastbourne", "Falkirk", "Darlington", "Falmouth", "Daventry", "Fakenham", "Fareham", "Banchory", "Derby", "Anstruther", "St Andrews", "Ashbourne", "Ladybank", "Aboyne / Ballater", "Craigellachie", "Barmouth", "East Grinstead", "Elgin", "Bracknell", "Fraserburgh", "Easingwold", "Fishguard", "Dingwall", "Dunkeld", "Mold", "Ely", "Chatteris", "East Kilbride", "Brechin", "Strathaven", "Ellon", "Pakenham", "Killearn", "Duns", "Dereham", "Crediton", "Ashburton", "Downham Market", "Faringdon", "Dunbar", "Dunoon", "Great Dunmow", "Esher", "Frome", "Grays Thurrock", "Braintree", "Driffield", "Diss", "Devizes", "Fortrose", "Dundee", "Dunfermline", "Dudley", "Evesham", "Dumfries", "Langholm", "Bishop Auckland / Stanhope", "Dumbarton", "Exeter", "Felixstowe", "Budleigh Salterton", "Fort William", "Dulverton", "Honington", "Horsham", "Honiton", "Goole", "Holbeach", "Holyhead", "Golspie", "Holsworthy", "Glasgow", "Alton", "Halifax", "Boroughbridge / Harrogate", "Hastings", "Ringwood", "Gainsborough", "Haslemere", "Hartlepool", "Market Weighton / North Cave", "Helmsdale", "Hereford", "Hathersage", "Bellingham / Haltwhistle / Hexham", "Heathfield", "Helensburgh", "Clynderwen / Haverfordwest", "Stevenage", "Helmsley", "Haverhill", "Hemel Hempstead", "Pontypridd", "Haywards Heath", "Gairloch", "Barry", "Stowmarket", "Hawick", "Stow-on-the-Wold", "Gloucester", "Dursley", "Chipping Sodbury", "Hinckley", "Glenurquhart", "Glossop", "Glastonbury", "Chard", "Gretna", "Hitchin", "Inverness", "Insch", "Girvan", "Huntly", "Inverurie", "Killingholme", "Isle of Skye – Edinbane", "Isle of Skye – Broadford", "Grimsby", "Ipswich", "Gravesend", "Greenock", "Grantham", "Holmes Chapel", "Isle of Skye – Portree", "Grantown-on-Spey", "Huntingdon", "Guernsey", "Hull", "Guildford", "Huddersfield", "Hunstanton", "Warboys", "Hungerford", "Bishops Waltham", "Corwen", "Henley-on-Thames", "Colwyn Bay", "Great Yarmouth", "High Wycombe", "Pontypool", "Islay and Jura", "Hay-on-Wye", "Inveraray", "Harthill", "Lowestoft", "Looe", "Johnstone", "Bathgate", "Alford (Lincs) / Louth / Horncastle", "Brooke", "Loughborough", "Liverpool", "Lochcarron", "Lincoln", "Lancaster", "Hornby", "Leighton Buzzard", "Martin", "Redditch", "Laggan", "Sleaford", "Coalville", "Ledbury", "Jersey", "Keighley", "Kettering", "Leek", "Kendal", "Hawkshead", "Grange-Over-Sands", "Sedbergh", "Kingussie", "Keith", "Cannock", "Kington", "Llanarth", "Lochgilphead", "Knighton", "Kingsbridge", "Lairg", "Llandovery", "Kings Lynn", "Llanelli", "Lanark", "Castle Douglas", "Kirkcudbright", "Llandeilo", "Llandysul", "Moscow", "Laurencekirk", "Kidderminster", "Kilmarnock", "Lapworth", "Knutsford", "Launceston", "Killin", "Leominster", "Stonehaven", "Lampeter", "Lochinver", "Oakham", "Kelso", "Kirriemuir", "Lockerbie", "Kinross", "Lauder", "Liskeard", "Cranbrook", "New Luce", "Luton", "Carradale", "Ludlow", "Campbeltown", "Bishops Castle", "Lymington", "Llanwrtyd Wells", "Kirkcaldy", "Lybster", "Lydney", "Lerwick, Shetland Islands", "Llandrindod Wells", "Lynton", "Kyle", "Monmouth", "Norwich", "Northampton", "Northwich", "Chipping Norton", "Northallerton", "Manchester", "North Berwick", "Maldon", "Maidstone", "Mansfield", "Isle of Man", "Macclesfield", "Newton Abbot", "Maidenhead", "Matlock", "Market Drayton", "Oban", "Newport", "Medway", "Newbury", "Newark", "Newquay", "Newmarket", "Neath", "Strathy", "Middlesbrough", "Minehead", "New Galloway", "Milford Haven", "Moretonhampstead", "Cemmaes Road", "Oldmeldrum", "Brigg", "Malton", "Machynlleth", "Maybole", "Bridgend", "Sanquhar", "Prudhoe", "New Mills", "Melton Mowbray", "Alnwick", "Malmesbury", "Nairn", "Bamburgh", "Rothbury", "Morpeth", "Newton Stewart", "Marlborough", "Market Rasen", "Montrose", "Coleshill", "Meriden", "Bedale", "Bala", "Isle of Mull – Craignure", "Isle of Mull – Fionnphort", "Moffat", "Malvern", "Merthyr Tydfil", "Llanidloes / Newtown", "Mallaig", "Isle of Mull – Tobermory", "Orpington", "Betws-y-Coed", "Oswestry", "North Walsham", "Church Stretton", "Skelmersdale", "Brampton (6 figure numbers)", "Wigton", "Raughton Head", "Brampton (4 and 5 figure numbers)", "Motherwell", "Rothesay", "Southend-on-Sea", "Southport", "Rochdale", "Welwyn Garden City", "Romford", "Rotherham", "Isles of Scilly", "Peebles", "Salisbury", "Scarborough", "Scunthorpe", "Rockbourne", "St Austell", "St Albans", "Saxmundham", "Settle", "Petersfield", "Sevenoaks", "Peterborough", "Penzance", "Redhill", "Perth", "Sedgefield", "Shrewsbury", "St Helens", "Rhyl", "Bridgnorth", "Shaftesbury", "Richmond", "Shepton Mallet", "Selkirk", "Pickering", "Plymouth", "Slough", "Skegness", "Skipton", "Selby", "Pwllheli", "Pocklington", "Swaffham", "Temple Cloud", "Royston", "Crieff", "Ripon", "Porthmadog", "Sandy", "Penrith", "Appleby", "Pooley Bridge", "Keswick", "South Molton", "Isle of Arran", "Maud", "Preston", "Ripley", "Spalding", "Stranraer", "Retford", "Bourne", "Peterhead", "Stamford", "Stoke-on-Trent", "Staines", "Stafford", "Stirling", "Sudbury", "Rugby", "Stratford-upon-Avon", "Spilsby", "Swansea", "Swindon", "Romsey", "Sittingbourne", "Pitlochry", "Rye", "Pulborough", "Saffron Walden", "Torquay", "Torrington", "Sullom Voe, Shetland Islands", "Ballindalloch", "Tomatin", "Tomdoun", "Kinrossie", "Tavistock", "Taunton", "Ruthin", "Uckfield", "Tamworth", "Coupar Angus", "Tarporley", "Kirkwhelpington", "Clopton", "Barnard Castle", "Narberth", "St Boswells", "Okehampton", "Dalmally", "Camelford", "Padstow", "Thetford", "Thanet", "Thame", "Thirsk", "Thurso / Tongue", "Thornhill", "Lewis and Great Bernera, Outer Hebrides", "Kilmelford", "Ullapool", "Ballachulish", "Orkney", "Sanday", "Market Harborough", "Harris, Outer Hebrides", "Tain", "Ardgay", "Abington", "Oxford", "Kilchrenan", "Bicester", "Benebecula, Outer Hebrides", "Barra, Outer Hebrides", "Truro", "Abergavenny", "Brecon", "Tranent", "North Uist, Outer Hebrides", "Callander", "South Uist, Outer Hebrides", "Scarinish", "Tarbert", "Kinloch Rannoch", "Caterham", "Tiverton", "Bromyard", "Knightwick", "Aberfeldy", "Turriff", "Rugeley", "Ayton / Coldstream", "Tunbridge Wells", "Uxbridge", "Galashiels", "Biggar", "Workington", "Wolverhampton", "Worthing", "York", "Worcester", "Milton Keynes", "Worksop", "Tyneside / Durham / Sunderland", "Ware", "Walsall", "Watford", "Wakefield", "Warrington", "Warwick", "Runcorn", "Wareham", "Shap", "Weybridge", "Wellingborough", "Weston-Super-Mare", "Yeovil", "Wetherby", "Welshpool", "Wem", "Wigan", "Guiseley", "West Heslerton", "Wisbech", "Whitehaven", "Gosforth", "Whitby", "Whitchurch", "Whatton", "Sandwick, Shetland Islands", "Colonsay", "Telford", "Wymondham", "Madingley", "Wick", "Mid Yell, Shetland Islands", "Westerham", "Winchester", "Wincanton", "Hornsea / Patrington", "Strontian", "Penicuik", "Leyburn", "Aberystwyth", "Scourie", "Glenborrodale", "Llanon", "Alford (Aberdeen) / Strathdon", "Pontefract", "Wrexham", "Amesbury", "Wormbridge", "Builth Wells", "Isle of Wight", "Watchet", "Warminster", "Bungay", "Ebbsfleet", "Wigtown", "Ross-on-Wye", "Lea Valley", "Witney", "St Clears", "Garstang", "Strathpeffer", "London", "Southampton / Portsmouth", "Coventry", "Northern Ireland", "Cardiff" };
/* Set up the Multithreading class */
public Multithreading()
{
/* Set up Multithreading component */
InitializeComponent();
}
/* Button function to encrypt the telephone number entered */
void ButtonEncrypt(object sender, RoutedEventArgs e)
{
numberTextToEncrypt = null;
numberDoubleToEncrypt = 0; // Set variable to zero
areaCodeCheck = false; // Set variable to false
NumberFound.Text = "#"; // Reset text block value
Region.Text = "#"; // Reset text block value
EncryptionTime.Text = "#"; // Set text block value
CoresUsed.Text = "#"; // Set text block value
NumberEncryptionTextBox.Text = null; // Set text block value to null
numberTextToEncrypt = NumberToEncrypt.Text; // Set variable equal to text box text
numberTextToEncrypt = Regex.Replace(numberTextToEncrypt, @"\s+", ""); // Remove white space entered
/* Check if variable length is equal to 11 digits */
if (numberTextToEncrypt.Length == 11)
{
/* Try to convert the variable to double */
if (double.TryParse(numberTextToEncrypt, out numberDoubleToEncrypt))
{
/* Invoke function to verify the area code entered matches an area */
verifyAreaCode();
/* Check the area code entered matches an area */
if (areaCodeCheck)
{
watch.Reset(); // Reset stopwatch
watch.Start(); // Start stopwatch
progressBarValueEncrypt.IsIndeterminate = true; // Invoke progress bar
NumberFound.Text = "[PROCESSING]"; // Set text block value
EncryptionTime.Text = "[PROCESSING]"; // Set text block value
CoresUsed.Text = "[PROCESSING]"; // Set text block value
Region.Text = "[PROCESSING]"; // Set text block value
BackgroundWorker inBackground = new BackgroundWorker(); // Create background worker method
inBackground.DoWork += doWork; // Invoke 'doWork' method
inBackground.RunWorkerCompleted += onCompletion; // Invoke 'onCompletion' method once work is completed
inBackground.RunWorkerAsync(); // Run background worker asynchronously
}
else
{
/* Display error message and return command to the user interface */
MessageBox.Show("Please ensure a valid UK area code is entered", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
else
{
/* Display error message and return command to the user interface */
MessageBox.Show("Please ensure only a number is entered", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
else
{
/* Display error message and return command to the user interface */
MessageBox.Show("Please ensure a valid telephone number is entered containing 11 digits", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
}
/* Function to carry out work in background worker thread */
void doWork(object sender, DoWorkEventArgs e)
{
valuePerThread = 0; // Initialise the variable to zero
difference = 0; // Initialise the variable to zero
areaCodeCheck = false; // Initialise variable to false
areaCodeLength = 0; // Set area code length to zero
noCores = Environment.ProcessorCount; // Get number of cores and store in variable
Thread[] multiThreads = new Thread[noCores]; // Create array of threads equal to number of cores
/* Check to see if the telephone number is divisible by the number of cores */
if (numberDoubleToEncrypt % noCores == 0)
{
/* Divide the telephone number entered by the number of cores and store in variable */
valuePerThread = numberDoubleToEncrypt / noCores;
/* Divide the telephone number entered by the number of cores and store in new variable,
in order to determine the increment value to be added */
difference = numberDoubleToEncrypt / noCores;
/* Invoke function to set the values to be checked on each core to determine the telephone
number the user has entered */
setValues();
}
else
{
/* Divide the telephone number entered by the number of cores and round up to the nearest
whole number, followed by storing the value in a variable */
valuePerThread = Math.Ceiling(numberDoubleToEncrypt / noCores);
/* Divide the telephone number entered by the number of cores and round up to the nearest
whole number, followed by storing the value in a new variable in order to determine the
increment value to be added */
difference = Math.Ceiling(numberDoubleToEncrypt / noCores);
/* Invoke function to set the values to be checked on each core to determine the telephone
number the user has entered */
setValues();
}
/* For the number of cores in the device, execute the following */
for (int i = 0; i < noCores; i++)
{
multiThreads[i] = new Thread(findNumber); // Create a new thread and pass in the 'findNumber' function as a parameter
multiThreads[i].Start(i); // Invoke the thread and pass in the position to the 'findNumber' function
}
/* For the number of cores in the device, wait for each thread to complete its process before
continuing */
for (int i = 0; i < noCores; i++) multiThreads[i].Join();
/* Store the time taken to complete the process in a variable */
completionTime = Math.Floor(watch.Elapsed.TotalSeconds).ToString() + " seconds ";
coresUsed = noCores.ToString(); // Convert the cores used to a string and store in a variable
}
/* Function to set the 'from' and 'to' array position values for each core on the device to determine
the telephone number the user entered */
void setValues()
{
double start = 0; // Declare and initialise the 'start' value to zero
/* For the number of cores on the device, execute the for loop */
for (int i = 0; i < noCores; i++)
{
from[i] = start; // Store the 'start' value in the 'from' array position
to[i] = valuePerThread; // Store the 'valuePerThread' value in the 'to' array position
start += difference; // Increment the 'start' value by the difference
valuePerThread += difference; // Increment the 'valuePerThread' by the difference
}
}
/* Function to execute from the background worker once the 'doWork' function is completed */
void onCompletion(object sender, RunWorkerCompletedEventArgs e)
{
/* Set text block value and insert a space at the position proceeding the area code length */
NumberFound.Text = correctNumber.Insert(areaCodeLength, " ");
Region.Text = areaConfirmed; // Set text block value
EncryptionTime.Text = completionTime; // Set text block value
CoresUsed.Text = coresUsed; // Set text block value
/* Call external class method and pass in variable to encrypt the telephone number entered.
Set text box text equal to encrypted value */
NumberEncryptionTextBox.Text = EncryptionDecryption.Encrypt(correctNumber);
progressBarValueEncrypt.IsIndeterminate = false; // Disable the progress bar
}
/* Function to verify the area code matches an area code */
void verifyAreaCode()
{
/* For the length of the 'areaCodes', execute the following loop */
for (int j = 0; j < areaCodes.Length; j++)
{
/* Check if the first four characters of the number to encrypt text matches
the array position of the area code */
if (numberTextToEncrypt.Substring(1, 4) == Convert.ToString(areaCodes[j]))
{
areaCodeCheck = true; // Set the variable to true to confirm it matches
}
else
{
/* Check if the first three characters of the number to encrypt text matches
the array position of the area code */
if (numberTextToEncrypt.Substring(1, 3) == Convert.ToString(areaCodes[j]))
{
areaCodeCheck = true; // Set the variable to true to confirm it matches
}
else
{
/* Check if the first two characters of the number to encrypt text matches
the array position of the area code */
if (numberTextToEncrypt.Substring(1, 2) == Convert.ToString(areaCodes[j]))
{
areaCodeCheck = true; // Set the variable to true to confirm it matches
}
}
}
}
}
/* Function to find the telephone number entered by the user, passing int the position from the
calling thread */
void findNumber(object value)
{
/* Declare and initialise the variable set to the position of the calling thread by casting the
object to an integer */
int position = (int)value;
/* Declare and initialise member double value to the 'from' array 'position' value */
double i = from[position];
/* Execute while loop to determine if the telephone number entered matches a number between
the array 'from' position value to the 'to' position value */
while (i >= from[position] && i <= to[position])
{
/* Check if the value matches the telephone number */
if (i == numberDoubleToEncrypt)
{
/* Set the variable equal to the matching value; convert to string; add a '0' and store
in variable */
correctNumber = "0" + i.ToString();
/* Invoke the find region function and pass in the 'correctNumber' value */
findRegion(correctNumber);
return; // Return the command to the user interface
}
i++; // Increment by one
}
return; // Return the command to the user interface
}
/* Function to find the region from the telephone number found by the computer */
void findRegion(string confirmedNumber)
{
/* For the length of the 'areaCodes', execute the following loop */
for (int i = 0; i < areaCodes.Length; i++)
{
/* Check if the first four characters of the number to encrypt text matches
the array position of the area code */
if (confirmedNumber.Substring(1, 4) == Convert.ToString(areaCodes[i]))
{
areaConfirmed = regions[i]; // Set variable value equal to the 'regions' array position value
areaCodeLength = 5; // Set variable value
}
else
{
/* Check if the first three characters of the number to encrypt text matches
the array position of the area code */
if (confirmedNumber.Substring(1, 3) == Convert.ToString(areaCodes[i]))
{
areaConfirmed = regions[i]; // Set variable value equal to the 'regions' array position value
areaCodeLength = 4; // Set variable value
}
else
{
/* Check if the first two characters of the number to encrypt text matches
the array position of the area code */
if (confirmedNumber.Substring(1, 2) == Convert.ToString(areaCodes[i]))
{
areaConfirmed = regions[i]; // Set variable value equal to the 'regions' array position value
areaCodeLength = 3; // Set variable value
}
}
}
}
}
}
}
答案 0 :(得分：1)
使用多个线程带来的额外性能正在被开始启动线程的开销所取代。对于更复杂的指令，此实现更有用。
遗憾的是，执行速度太快，无法从多线程中受益。
while (counter != convertInput)
{
if (counter == convertInput)
{
watch.Stop();
return;
}
counter++;
}