Help understanding multidimensional array and pointer notation in c++ -


I understand the basic idea that when an array is the only operam & amp; Or sizeof () operator, it decays an indicator for the first element in the array. I am unsure about how these notations work. In our lessons, there are 1-D cases, 3-D cases versus an array The first example is the function for the function, which is called normal. 1-D case 

  Double average (double set []) or double average (double * set)

Not equal multi-d case Announcement 

  Double average [] [DIM1] [DIM2]) or double average (double (* set) [DIM1] [DIM2])  < Similarly, the function declaration for printing a value for 1-D: 
 
  double * print value (double value)  
 < P> D is the case: 
 
 Double (* print value (double value) [DIM1] [DIM2] 
 
 Does anyone have any questions on this Can you put light? Thank you.

parameter still decays important for an indicator is that the size of DIM 1 and DIM2 all Specify, but one dimension Therefore, if we have: 

  Double average (double set [] [DIM1] [DIM2] MySet)

MySset [0] [0] Together with DIM2 * size (double) MySet [0] [1], two dimensions say that mileage [1] before mileage [0] is DIM 1 * DIM2 * size (double) I left you And a DIM0 is not required, because the number of rows does not affect indicative arithmetic. You can always leave the left dimension for this reason.


Comments

Post a Comment

Popular posts from this blog

c++ - QtQuick: QQmlApplicationEngine failed to load component qrc:/main.qml:23 Invalid attached object assignment -

Looking at my thoughts below, am I barking the wrong tree? Or in the information given below, am I misusing the Qt API to get an error in the title? I'm trying to modify the sample to work with the default coefficic project generated from Qt Creator 3.3.0 (OpenSource). Qt 5.4.0 (GCC 4.6.1, 64bit) Based on. The first thing to look at after the code is that I stand by: The sample uses the main.cpp: qmlRegisterType & lt ; Squircle & gt; ("OpenGLUARMM", 1, 0, "Squircle"); QQuickView view; View.setResizeMode (QQuickView :: SizeRootObjectToView); View.setSource (QUrl ("QRC: ///scenegraph/openglunderqml/main.qml")); View.show (); Some name changes in my name. CPP qmlRegisterType & lt; Menuscreen & gt; ("OpenGLUnderQML", 1, 0, "Main Screen"); QQmlApplicationEngine engine; Engine.load (QUrl (QStringLiteral ("QRC: /main.qml"))); I'm not sure that the difference in using QQmlApplicationEngine...
Read more

sql - dynamically varied number of conditions in the 'where' statement using LINQ -

I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
Read more

php - What is the best way to get the URL of a 404'd file after redirect? -

I am working with a PHP site for which errors must be logged in a database. As such, I have set up an .htaccess file as follows: ErrorDocument 404 / 404.php All logging functions required to log in to 404.php include Database. Here went the content of $ _SERVER Suprglobl array: [HTTP_HOST] => {left} [HTTP_USER_AGENT] => Mozilla / 5.0 (Windows; U; Windows NT 5.1, en-US; RV .: 1.9.1.7) Lizard / 20,091,221 Firefox / 3.5.7 [HTTP_ACCEPT] => text / html, application / xhtml + xml, application / xml; Q = 0.9, * / *; q = 0.8 [HTTP_ACCEPT_LANGUAGE] => en-us, en; q = 0.5 [HTTP_ACCEPT_ENCODING] => gzip, remove air [HTTP_ACCEPT_CHARSET] => ISO-8859-1, utf-8; Q = 0.7, *; q = 0.7 [HTTP_KEEP_ALIVE] => 300 [HTTP_CONNECTION] => keep-alive [path] => / usr / local / bin: / usr / bin: / bin [SERVER_SIGNATURE] => [SERVER_SOFTWARE] => Apache / 2.2. 8 (Ubuntu) omitted [SERVER_NAME] => {} [SERVER_ADDR] => {left} [SERVER_PORT] => 80 [REMOTE_ADDR] => {lef...
Read more