c stl tutorial

function objects and predicates in STL algorithmsfunction objects and predicates define function objects:classes that overload function invocation operators, whose objects are often called function objects, are objects that behave like functions. A class object that shows the characteristics of a function that is through the object name + (Parameter list) "uses a class object in a way that can be treated as a function if there is no context.This is do

Even if you understand the data structure, efficient to write a tree structure, it is not easy to estimate, but since the use of STL, this is as simple as building blocks, and has a high stability. I use the vector container as a base to form a tree. For example, we want to generate the following structure of the tree. 3 2 2 2 2 1111 1111 1111 1111 This is a class quadtree and the lower level is 1 smaller than the upper level. See Code://Use

list object X's linked list into the current list link list. and empty the list of the x when merging, according to the current element one by one comparison and copied to the current listlist Element ProcessingL.sort () Merges the list L to sort, for example: C1.sort (); Default from small to large c1.sort (greatThe list L is excluded from continuous elements, for example: L Before: 6 8 6 6 6 9 13 6 call Unique () after: 6 8 6 9 for 6 l.unique (bool Function (t item1, t item2)) Write your own

Use of the vector of the STL Getting started with the first part Vectors can be used instead of arrays in C, or CArray in MFC, from many explanatory documents or online comments, and generally agree that vectors should be used more efficiently and with exceptional security. And vectors are the default containers recommended by STL, unless you know you have special needs, using vectors that do not meet your

Tags: STL stl array Arrayhere is a summary of the array method, the specific can be seen in the following links:Public member function std::array::operator[] Reference operator[] (size_type n); Const_reference operator[] (size_type n) const;returns a reference to an element of position n in the array container. Parameters N The position of the element in the array.

C ++ STL vector container learning, stlvector STL (Standard Template Library) is the most important component of C ++. It provides a set of templates that represent containers, iterators, function objects, and algorithms. The container is the structure of data with the same storage type (such as vector, list, deque, set, map, etc.), and the algorithm completes specific tasks. The iterator is used to travers

heap. At the same time, it can be noted that if a large heap, the root node must be the largest nodes in the tree, similarly, if it is a small heap, the root node must be the smallest node in the tree. Heap structure in the field of sequencing, occupy a certain low, but the STL does not directly give the heap structure, but the heap of related algorithms, written in the algorithm inside. I'm not going to do a lot of simulations here, and today I'm go

Go Selection of map and Hash_map containers in STLFirst look at Alvin_lee friends to do the analysis, I think it is still very correct, from the perspective of the algorithm to explain the problem between them!In fact, this problem is not only encountered in C + +, but the implementation and selection of standard containers in all other languages are considered. You may feel little impact on the application, but be careful about writing algorithms or core code. Improve the code today, by the way

] = {0,1,2,3,4};intn =sizeof(IA)/sizeof(ia[0]);cout//5 Setint>Iset (IA, ia+n);cout"Size="//Size=5 cout3) //1Iset.insert (3);//Insert not valid, element not allowed to repeat cout"Size="//Size=5 cout3) //2Iset.erase (1);cout1) //0 Setint>:: Iterator Ite1=iset.begin (); Setint>:: Iterator Ite2=iset.end (); for(; Ite1! = Ite2; ++ite1)cout" ";cout//0 2 3 4 //associative containers, which should search for elements using the Find function provided by them, will be more //

First, let's take a look at the analysis made by alvin_lee's friends. I think it is quite correct.AlgorithmThe problem between them is explained! In fact, this problem is not only encountered in C ++, but also in the implementation and selection of standard containers in all other languages. ApplyProgramYou may feel that the impact is not big, but you can write algorithms or the coreCodeBe careful. Today, I improved the code and, by the way, reviewed my basic lessons. Do you still remembe

STL provides a variety of containers, and we all feel the convenience it brings to us, but it also has some problems. When I first came to Baidu and checked the encoding specifications, I saw a suggestion that I should not use STL, but use Baidu's BSL, because the memory of STL is uncontrollable, it is not suitable for Baidu's online services. I didn't understand

Associated container The so-called associative container is similar to the relational database in concept: each piece of data has a key value and an actual value ). When an element is inserted into a container, the internal mechanism places the element in a specific position based on the key value according to certain rules. Associated containers do not have the so-called head and tail concept (only the maximum element and the minimum element). Therefore, they do not have operations such as push

understanding. Select the map container to quickly find related objects from keywords. Compared with the linear table container such as list, one can simplify the search algorithm, and the other can make any keyword index, and match with the target object to optimize the search algorithm. In the STL of C ++, map uses a tree for search. This algorithm is almost the same as the half-lookup efficiency of the List linear container. It is O (log2n ), th

My C/C ++ program can be compiled to ZTE and run on the beacon set-top box. I thought it would be a simple task to compile it to Android, but it is far more complicated than I think. In my program. c file and. CPP file, where. the STL string is used in the CPP file. After compilation, the STD: String library cannot be linked. The error undefined reference to 'std: basic_string is returned. It took two days to compile the stlport library, but ended in

Http://wiki.xyzp.net/index.php? Title = Moto % E7 % AC % 94% E8 % af % 95% E9 % A2 % 98% E7 % 9B % AE-STL/C % 2B % 2B % E9 % 9d % A2 % E8 % af % 95% E5 % B8 % 88 printable = Yes 2007 Motorola pen questions 1. Introduce STL and explain in detail how STL implements vector. Answer: STL (standard template library. It cons

From: http://www.yuanma.org/data/2009/1016/article_3969.htm # Include "stdio. H"# Include "stdlib. H"# Include # Include # Include # Include # Include # Include Using namespace STD; Void main (){Map /// It is automatically sorted by the keyword (key) over timeTest [5] = "11 ";Test [5] = "111 ";Test [6] = "22 ";Test [7] = "33 ";Test [8] = "44 ";Test. insert (pair Pair Val = test. insert (pair If (Val. Second = true){Cout }Else{Cout } Test. insert (pair Test. insert (pair Test. insert (pair /

=vert:\, Stl:\, STLNC:"Highlight matching parenthesesSetShowmatch"Match the time of the parentheses highlighting (in a very one second) set matchtime=1"Keep the cursor moving to the top and bottom of the buffer3Line DistanceSetscrolloff=3"Provide your own active indent set smartindent for C programs"Highlight Normal TXT file (requires Txt.vim script) au bufread,bufnewfile * Setfiletype txt"Self-Active Completion: Inoremap (() """' function! Closepair

Space Configurator From the implementation of the STL, the first thing to understand is the space Configurator, because the entire STL operation objects are placed in the container, and the container needs a certain allocation of space to place data. standard interface for Space Configurator Standard interface, some typedef allocator::value_type; Allocator::p ointer; Allocator::const_pointer; Allocator::re

The STL Standard Template Library for C + + provides basic operations for queues and stacks. Below, we introduce the use of STL queue and STL stack by two demos respectively.Demo1:stl Queue"title" Card Game (topic from Rujia "Introduction to algorithmic competition")Another stack of cards on the table, from the first c

The map class provided by the C ++ standard library is the container that saves the key-value pairs of In addition, as a container, STL map provides the corresponding iterator Map The above interface provided by STL map can greatly simplify the data structure of our code, but for developers who are not familiar with STL map usage or do not understand the implem