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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head> <meta name="generator" content= "HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org"> <title>C++ Vectors</title> <link href="../cppreference.css" rel="stylesheet" type="text/css"></head><body><table> <tr> <td> <div class="body-content"> <div class="header-box"> <a href="../index.html">cppreference.com</a> > <a href= "index.html">C++ Vectors</a> </div> <div class="name-format"> C++ Vectors </div> <p>Vectors contain contiguous elements stored as an array. Accessing members of a vector or appending elements can be done in <a href= "../complexity.html">constant time</a>, whereas locating a specific value or inserting elements into the vector takes <a href= "../complexity.html">linear time</a>.</p> <p><a href="all.html">Display all entries</a> for C++ Vectors on one page, or view entries individually:</p> <table class="category-table"> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "vector_constructors.html">Vector constructors</a></td> <td class="category-table-td">create vectors and initialize them with some data</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href= "vector_operators.html">Vector operators</a></td> <td class="category-table-td">compare, assign, and access elements of a vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "assign.html">assign</a></td> <td class="category-table-td">assign elements to a vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="at.html">at</a></td> <td class="category-table-td">returns an element at a specific location</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href="back.html">back</a></td> <td class="category-table-td">returns a reference to last element of a vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="begin.html">begin</a></td> <td class="category-table-td">returns an iterator to the beginning of the vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "capacity.html">capacity</a></td> <td class="category-table-td">returns the number of elements that the vector can hold</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="clear.html">clear</a></td> <td class="category-table-td">removes all elements from the vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href="empty.html">empty</a></td> <td class="category-table-td">true if the vector has no elements</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="end.html">end</a></td> <td class="category-table-td">returns an iterator just past the last element of a vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href="erase.html">erase</a></td> <td class="category-table-td">removes elements from a vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="front.html">front</a></td> <td class="category-table-td">returns a reference to the first element of a vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "insert.html">insert</a></td> <td class="category-table-td">inserts elements into the vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href= "max_size.html">max_size</a></td> <td class="category-table-td">returns the maximum number of elements that the vector can hold</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "pop_back.html">pop_back</a></td> <td class="category-table-td">removes the last element of a vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href= "push_back.html">push_back</a></td> <td class="category-table-td">add an element to the end of the vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "rbegin.html">rbegin</a></td> <td class="category-table-td">returns a <a href= "../iterators.html">reverse_iterator</a> to the end of the vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="rend.html">rend</a></td> <td class="category-table-td">returns a <a href= "../iterators.html">reverse_iterator</a> to the beginning of the vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href= "reserve.html">reserve</a></td> <td class="category-table-td">sets the minimum capacity of the vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href= "resize.html">resize</a></td> <td class="category-table-td">change the size of the vector</td> </tr> <tr class="category-table-tr-2"> <td class="category-table-td"><a href="size.html">size</a></td> <td class="category-table-td">returns the number of items in the vector</td> </tr> <tr class="category-table-tr-1"> <td class="category-table-td"><a href="swap.html">swap</a></td> <td class="category-table-td">swap the contents of this vector with another</td> </tr> </table> </div> </td> </tr> </table></body></html>⌨️ 快捷键说明
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