\n| operator[]<\/td>\n | \u50cf\u6570\u7ec4\u4e00\u6837\u8bbf\u95ee<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u00a0 \u00a0 \u00a0 \u00a0 vector\u5e76\u6ca1\u6709\u63d0\u4f9bfind\u8fd9\u4e2a\u63a5\u53e3，\u53ef\u4ee5\u4f7f\u7528\u7b97\u6cd5\u5e93\u5f53\u4e2d\u7684find\u3002<\/p>\n
\n2 – 5 \u00b7 \u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898<\/h3>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>
\n \u8fed\u4ee3\u5668\u7684\u4e3b\u8981\u4f5c\u7528\u5c31\u662f\u8ba9\u7b97\u6cd5\u80fd\u591f\u4e0d\u7528\u5173\u5fc3\u5e95\u5c42\u6570\u636e\u7ed3\u6784，\u5176\u5e95\u5c42\u5b9e\u9645\u5c31\u662f\u4e00\u4e2a\u6307\u9488，\u6216\u8005\u662f\u5bf9\u6307\u9488\u8fdb\u884c\u4e86\u5c01\u88c5，\u6bd4\u5982：vector\u7684\u8fed\u4ee3\u5668\u5c31\u662f\u539f\u751f\u6001\u6307\u9488T* \u3002<\/span><\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fed\u4ee3\u5668\u5931\u6548\u6709\u4e24\u79cd\u60c5\u51b5，1. \u5e38\u53d1\u751f\u5728\u6269\u5bb9\u7684\u65f6\u5019，\u8fed\u4ee3\u5668\u5e95\u5c42\u5bf9\u5e94\u6307\u9488\u6240\u6307\u5411\u7684\u7a7a\u95f4\u88ab\u9500\u6bc1\u4e86，\u800c\u4f7f\u7528\u4e00\u5757\u5df2\u7ecf\u88ab\u91ca\u653e\u7684\u7a7a\u95f4，\u9020\u6210\u7684\u540e\u679c\u662f\u7a0b\u5e8f\u5d29\u6e83(\u5373\u5982\u679c\u7ee7\u7eed\u4f7f\u7528\u5df2\u7ecf\u5931\u6548\u7684\u8fed\u4ee3\u5668，\u7a0b\u5e8f\u53ef\u80fd\u4f1a\u5d29\u6e83)\u3002<\/span><\/p>\n \u00a0 \u00a0 \u00a0 \u00a0 2. \u5e38\u53d1\u751f\u5728\u6ca1\u6709\u6269\u5bb9\u7684\u65f6\u5019，\u7531\u4e8e\u6570\u636e\u7684\u632a\u52a8，\u8fed\u4ee3\u5668\u6307\u5411\u7684\u4f4d\u7f6e\u7684\u610f\u4e49\u53d1\u751f\u6539\u53d8，\u6b64\u65f6\u4e5f\u8ba4\u4e3a\u8fed\u4ee3\u5668\u5931\u6548\u3002<\/span><\/p>\n\u00a0 \u00a0 \u00a0 \u00a0 \u5bf9\u4e8evector，\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5176\u8fed\u4ee3\u5668\u5931\u6548\u7684\u64cd\u4f5c\u6709：<\/p>\n \u00a0 \u00a0 \u00a0 \u00a0 1.\u00a0\u4f1a\u5f15\u8d77\u5176\u5e95\u5c42\u7a7a\u95f4\u6539\u53d8\u7684\u64cd\u4f5c，\u90fd\u6709\u53ef\u80fd\u4f7f\u8fed\u4ee3\u5668\u5931\u6548，\u6bd4\u5982：resize\u3001reserve\u3001insert\u3001 <\/span><\/p>\n assign\u3001push_back\u7b49\u3002<\/span> <\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ee5\u4e0a\u64cd\u4f5c，\u90fd\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4vector\u6269\u5bb9，\u4e5f\u5c31\u662f\u8bf4vector\u65e7\u7a7a\u95f4\u88ab\u91ca\u653e\u6389，\u800c\u5728\u4f7f\u7528\u65f6，\u8fed\u4ee3\u5668\u8fd8\u4f7f\u7528\u7684\u662f\u91ca\u653e\u4e4b\u95f4\u7684\u65e7\u7a7a\u95f4，\u5728\u5bf9\u8fed\u4ee3\u5668\u64cd\u4f5c\u65f6，\u5b9e\u9645\u64cd\u4f5c\u7684\u662f\u4e00\u5757\u5df2\u7ecf\u88ab\u91ca\u653e\u7684\u7a7a\u95f4，\u800c\u5f15\u8d77\u4ee3\u7801\u8fd0\u884c\u65f6\u5d29\u6e83\u3002 <\/span><\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u89e3\u51b3\u65b9\u5f0f：\u5728\u4ee5\u4e0a\u64cd\u4f5c\u5b8c\u6210\u4e4b\u540e，\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u901a\u8fc7\u8fed\u4ee3\u5668\u64cd\u4f5cvector\u4e2d\u7684\u5143\u7d20，\u53ea\u9700\u7ed9\u8fed\u4ee3\u5668\u91cd\u65b0\u8d4b\u503c\u5373\u53ef\u3002<\/span><\/p>\n\u00a0 \u00a0 \u00a0 \u00a0 2. erase<\/span><\/p>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0erase\u5220\u9664pos\u4f4d\u7f6e\u5143\u7d20\u540e，pos\u4f4d\u7f6e\u4e4b\u540e\u7684\u5143\u7d20\u4f1a\u5f80\u524d\u642c\u79fb，\u6ca1\u6709\u5bfc\u81f4\u5e95\u5c42\u7a7a\u95f4\u7684\u6539\u53d8，\u7406 <\/span><\/p>\n \u8bba\u4e0a\u8bb2\u8fed\u4ee3\u5668\u4e0d\u5e94\u8be5\u4f1a\u5931\u6548，\u4f46\u662f：\u5982\u679cpos\u521a\u597d\u662f\u6700\u540e\u4e00\u4e2a\u5143\u7d20，\u5220\u5b8c\u4e4b\u540epos\u521a\u597d\u662fend\u7684\u4f4d\u7f6e，\u800cend\u4f4d\u7f6e\u662f\u6ca1\u6709\u5143\u7d20\u7684，\u90a3\u4e48pos\u5c31\u5931\u6548\u4e86\u3002\u5728vs\u4e2d\u7684\u68c0\u67e5\u662f\u6bd4\u8f83\u4e25\u683c\u7684，\u5220\u9664vector\u4e2d\u4efb\u610f\u4f4d\u7f6e\u4e0a\u5143\u7d20\u65f6，vs\u5c31\u8ba4\u4e3a\u8be5\u4f4d\u7f6e\u8fed\u4ee3\u5668\u5931\u6548\u4e86，\u800cvs\u7684\u5904\u7406\u4e5f\u6bd4\u8f83\u6781\u7aef，\u76f4\u63a5\u4f1a\u5d29\u6e83\u3002<\/span><\/p>\n\u00a0 \u00a0 \u00a0 \u00a0 \u4e0evector\u7c7b\u4f3c，string \u5728\u63d2\u5165，\u6269\u5bb9，\u5220\u9664\u64cd\u4f5c\u540e，\u8fed\u4ee3\u5668\u4e5f\u4f1a\u5931\u6548\u3002<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fed\u4ee3\u5668\u5931\u6548\u89e3\u51b3\u529e\u6cd5：\u5728\u4f7f\u7528\u524d，\u5bf9\u8fed\u4ee3\u5668\u91cd\u65b0\u8d4b\u503c\u5373\u53ef<\/span><\/p>\n
\n3 \u00b7 typename\u7684\u4f5c\u7528<\/h2>\n\u00a0 \u00a0 \u00a0 \u00a0 \u5bf9vector\u7684\u6a21\u62df\u5b9e\u73b0\u5c31\u8981\u5f80\u6a21\u677f\u53bb\u5199\u4e86，\u4f46\u662f\u540c\u65f6\u4f7f\u7528\u65f6\u4e5f\u4f1a\u4ea7\u751f\u4e00\u4e9b\u95ee\u9898，\u6bd4\u5982\u4e0b\u9762，\u60f3\u7528\u5168\u5c40\u51fd\u6570\u5b9e\u73b0\u5bf9vector\u7684\u6253\u5370：<\/p>\n template<class T>
\nvoid vector_print(const vector<T>& v)
\n{
\nvector<T>::const_iterator it = v.begin();
\nwhile (it != v.end())
\n{
\ncout << *it << endl;
\n++it;
\n}
\ncout << endl;
\n} <\/p>\n \u00a0 \u00a0 \u00a0 \u00a0 \u8fd9\u6837\u5199\u662f\u4f1a\u62a5\u9519\u7684，\u5bf9\u4e8e vector<T>::const_iterator it = v.begin(); \u8fd9\u4e00\u4e2a\u8bed\u53e5，\u901a\u8fc7\u57df\u4f5c\u7528\u9650\u5b9a\u7b26，\u7f16\u8bd1\u5668\u53bb\u91cc\u9762\u53d6\u4e1c\u897f，\u53ef\u80fd\u53d6\u5230\u4e00\u4e2a\u7c7b\u578b，\u4e5f\u53ef\u80fd\u53d6\u5230\u9759\u6001\u6210\u5458\u53d8\u91cf，\u4f46\u662f\u8fd9\u91cc\u7531\u4e8e\u7c7b\u578b\u662f\u4e0d\u786e\u5b9a\u7684，\u6240\u4ee5vector\u5e76\u6ca1\u6709\u5b9e\u4f8b\u5316，\u7f16\u8bd1\u5668\u4e0d\u6562\u53bb\u7c7b\u91cc\u9762\u53d6\u4e1c\u897f，\u6240\u4ee5\u6b64\u65f6\u7f16\u8bd1\u5668\u4e0d\u77e5\u9053\u662f\u4ec0\u4e48，\u56e0\u6b64\u62a5\u9519\u3002\u8fd9\u91cc\u5c31\u9700\u8981\u5728\u524d\u9762\u52a0\u4e0a typename<\/p>\n typename vector<T>::const_iterator it = v.begin(); <\/p>\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u7528 typename \u5c31\u662f\u544a\u8bc9\u7f16\u8bd1\u5668\u8fd9\u91cc\u662f\u4e00\u4e2a\u7c7b\u578b，\u5c31\u4e0d\u4f1a\u62a5\u9519\u4e86\u3002\u4e5f\u6709\u4e00\u4e2a\u66f4\u7b80\u5355\u7684\u65b9\u5f0f，\u7528auto\u3002<\/p>\n
\n4 \u00b7 vector\u7684\u6a21\u62df\u5b9e\u73b0<\/h2>\n\u00a0 \u00a0 \u00a0 \u00a0 \u5f80\u6a21\u677f\u53bb\u5199\u7684\u8bdd，\u5c31\u4e0d\u80fd\u58f0\u660e\u548c\u5b9a\u4e49\u5206\u79bb\u5230\u4e24\u4e2a\u6587\u4ef6\u53bb\u4e86，\u4f1a\u62a5\u8fde\u63a5\u9519\u8bef\u3002<\/p>\n
\n4 – 1 \u00b7 vector.h<\/h3>\n#pragma once
\n#include <iostream>
\n#include <assert.h>
\nusing namespace std;<\/p>\n namespace naobeng
\n{
\ntemplate<class T>
\nclass vector
\n{
\npublic:
\ntypedef T* iterator;
\ntypedef const T* const_iterator;<\/p>\n vector()
\n{}<\/p>\n vector(size_t n, const T& val = T())
\n{
\nreserve(n);<\/p>\n for (size_t i = 0; i < n; i++)
\n{
\npush_back(val);
\n}
\n}<\/p>\n \/\/\u5bf9int\u7684vector\u7684n\u4e2aval\u7684\u521d\u59cb\u5316，\u9632\u6b62\u5339\u914d\u5230\u8fed\u4ee3\u5668\u533a\u95f4\u6784\u9020\u53bb
\nvector(int n, const T& val = T())
\n{
\nreserve(n);<\/p>\n for (int i = 0; i < n; i++)
\n{
\npush_back(val);
\n}
\n}<\/p>\n template<class InputIterator>
\nvector(InputIterator first, InputIterator last)
\n{
\nwhile (first != last)
\n{
\npush_back(*first);
\n++first;
\n}
\n}<\/p>\n vector(const vector<T>& v)
\n{
\nreserve(v.size());<\/p>\n for (auto& e : v)
\n{
\npush_back(e);
\n}
\n}<\/p>\n void clear()
\n{
\n_finish = _start;
\n}<\/p>\n \/\/\u4f20\u7edf\u5199\u6cd5
\nvector<T>& operator=(const vector<T>& v)
\n{
\nif (this != &v)
\n{
\nclear();<\/p>\n reserve(v.size());
\nfor (auto& e : v)
\n{
\npush_back(e);
\n}
\n}<\/p>\n return *this;
\n}<\/p>\n void swap(vector<T> tmp)
\n{
\nstd::swap(_start, tmp._start);
\nstd::swap(_finish, tmp._finish);
\nstd::swap(_end_of_storage, tmp._end_of_storage);
\n}<\/p>\n \/\/\u73b0\u4ee3\u5199\u6cd5
\n\/*vector<T>& operator=(vector<T> tmp)
\n{
\nswap(tmp);<\/p>\n return *this;
\n}*\/<\/p>\n ~vector()
\n{
\nif (_start)
\n{
\ndelete[] _start;
\n_start = _finish = _end_of_storage = nullptr;
\n}
\n}<\/p>\n iterator begin()
\n{
\nreturn _start;
\n}<\/p>\n iterator end()
\n{
\nreturn _finish;
\n}<\/p>\n const_iterator begin() const
\n{
\nreturn _start;
\n}<\/p>\n const_iterator end() const
\n{
\nreturn _finish;
\n}<\/p>\n void reserve(size_t n)
\n{
\nsize_t oldsize = size();
\nT* tmp = new T[n];
\n\/\/memcpy(tmp, _start, sizeof(T) * size());\/\/memcpy\u662f\u6d45\u62f7\u8d1d
\nfor (size_t i = 0; i < oldsize; i++)
\n{
\ntmp[i] = _start[i];
\n}
\ndelete[] _start;<\/p>\n _start = tmp;
\n_finish = tmp + oldsize;
\n_end_of_storage = tmp + n;
\n}<\/p>\n size_t size() const
\n{
\nreturn _finish – _start;
\n}<\/p>\n size_t capacity() const
\n{
\nreturn _end_of_storage – _start;
\n}<\/p>\n void resize(size_t n, T val = T())
\n{
\nassert(n >= 0);<\/p>\n if (n < size())
\n{
\n_finish = _start + n;
\n}
\nelse
\n{
\nreserve(n);<\/p>\n while (_finish < _start + n)
\n{
\n*_finish = val;
\n++_finish;
\n}
\n}
\n}<\/p>\n bool empty()
\n{
\nreturn _start == _finish;
\n}<\/p>\n T& operator[](size_t i)
\n{
\nreturn _start[i];
\n}<\/p>\n const T& operator[](size_t i) const
\n{
\nassert(i < size());<\/p>\n return _start[i];
\n}<\/p>\n void push_back(const T& x)
\n{
\nif (_finish == _end_of_storage)
\n{
\nreserve(capacity() == 0 ? 4 : 2 * capacity());
\n}
\n*_finish = x;
\n++_finish;
\n}<\/p>\n void pop_back()
\n{
\nassert(!empty());<\/p>\n –_finish;
\n}<\/p>\n iterator insert(iterator pos, const T& x)
\n{
\nassert(pos >= _start);
\nassert(pos <= _finish);<\/p>\n if (_finish == _end_of_storage)
\n{
\n\/\/\u8bb0\u5f55\u76f8\u5bf9\u4f4d\u7f6e，\u89e3\u51b3\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898
\nsize_t len = pos – _start;
\nreserve(capacity() == 0 ? 4 : 2 * capacity());
\npos = _start + len;
\n}<\/p>\n iterator end = _finish – 1;
\nwhile (end >= pos)
\n{
\n*(end + 1) = *end;
\n–end;
\n}
\n*pos = x;
\n++_finish;<\/p>\n return pos;
\n}<\/p>\n iterator erase(iterator pos)
\n{
\nassert(pos >= _start);
\nassert(pos <= _finish);<\/p>\n iterator it = pos + 1;
\nwhile (it != end())
\n{
\n*(it – 1) = *it;
\n++it;
\n}
\n–_finish;<\/p>\n return pos;
\n}<\/p>\n private:
\niterator _start = nullptr;
\niterator _finish = nullptr;
\niterator _end_of_storage = nullptr;
\n};
\n} <\/p>\n
\n\u4ee5\u4e0a\u5185\u5bb9\u5982\u6709\u9519\u8bef\u6216\u4e0d\u51c6\u786e\u4e4b\u5904，\u6b22\u8fce\u6307\u51fa，\u6216\u8005\u4f60\u6709\u66f4\u597d\u7684\u60f3\u6cd5，\u4e5f\u6b22\u8fce\u4ea4\u6d41\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u76ee\u5f55
\n1 \u00b7 vector\u7684\u57fa\u672c\u6982\u5ff5
\n2 \u00b7 vector\u7684\u4f7f\u7528
\n2 – 1 \u00b7 vector\u7684\u5b9a\u4e49
\n2 – 2 \u00b7 vector\u4e2d\u7684\u8fed\u4ee3\u5668
\n2 – 3 \u00b7 vector\u7684\u7a7a\u95f4
\n2 – 4 \u00b7 vector\u7684\u589e\u5220\u67e5\u6539
\n2 – 5 \u00b7 \u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898
\n3 \u00b7 typename\u7684\u4f5c\u7528
\n4 \u00b7 vector\u7684\u6a21\u62df\u5b9e\u73b0
\n4 – 1 \u00b7 vector.h 1 \u00b7 vector\u7684\u57fa\u672c\u6982\u5ff5 vector \u662f C \u6807\u51c6\u6a21\u677f\u5e93（STL）\u4e2d\u7684\u52a8\u6001\u6570<\/p>\n","protected":false},"author":2,"featured_media":82816,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-82818","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-190"],"yoast_head":"\n C++ vector - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/82818.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ vector - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u76ee\u5f55 1 \u00b7 vector\u7684\u57fa\u672c\u6982\u5ff5 2 \u00b7 vector\u7684\u4f7f\u7528 2 - 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