{"id":44866,"date":"2025-06-21T06:05:56","date_gmt":"2025-06-20T22:05:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/44866.html"},"modified":"2025-06-21T06:05:56","modified_gmt":"2025-06-20T22:05:56","slug":"c-stl-vector%e5%ae%b9%e5%99%a8%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/44866.html","title":{"rendered":"C++ STL vector\u5bb9\u5668\u8be6\u89e3\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u8df5"},"content":{"rendered":"<h3>\u5f15\u8a00<\/h3>\n<p>\u4eb2\u7231\u7684\u5c0f\u4f19\u4f34\u4eec&#xff0c;\u4eca\u5929\u6211\u8981\u548c\u5927\u5bb6\u5206\u4eab\u4e00\u4e2aC&#043;&#043;\u7f16\u7a0b\u4e2d\u7684&#034;\u795e\u5668&#034;\u2014\u2014vector\u5bb9\u5668&#xff01;\u4f5c\u4e3aSTL&#xff08;\u6807\u51c6\u6a21\u677f\u5e93&#xff09;\u4e2d\u6700\u5e38\u7528\u7684\u5bb9\u5668\u4e4b\u4e00&#xff0c;vector\u5c31\u50cf\u662f\u4e00\u4e2a&#034;\u8d85\u7ea7\u6570\u7ec4&#034;&#xff0c;\u65e2\u6709\u6570\u7ec4\u7684\u9ad8\u6548\u968f\u673a\u8bbf\u95ee\u7279\u6027&#xff0c;\u53c8\u80fd\u81ea\u52a8\u8c03\u6574\u5927\u5c0f&#xff0c;\u8ba9\u4f60\u544a\u522b\u56fa\u5b9a\u5927\u5c0f\u6570\u7ec4\u7684\u56f0\u6270\u3002\u4e0d\u7ba1\u4f60\u662f\u521a\u63a5\u89e6C&#043;&#043;\u7684\u65b0\u624b&#xff0c;\u8fd8\u662f\u60f3\u6df1\u5165\u7406\u89e3vector\u5b9e\u73b0\u539f\u7406\u7684\u8001\u624b&#xff0c;\u8fd9\u7bc7\u535a\u5ba2\u90fd\u80fd\u5e26\u7ed9\u4f60\u65b0\u7684\u6536\u83b7&#xff01;<\/p>\n<h3>\u4e00\u3001\u4ec0\u4e48\u662fvector&#xff1f;<\/h3>\n<p>\u60f3\u8c61\u4e00\u4e0b&#xff0c;\u4f60\u6b63\u5728\u6536\u96c6\u5404\u79cd\u5c0f\u73a9\u5177&#xff0c;\u4f46\u4e0d\u786e\u5b9a\u6700\u7ec8\u4f1a\u6709\u591a\u5c11\u4e2a\u3002\u7528\u666e\u901a\u6570\u7ec4\u7684\u8bdd&#xff0c;\u4f60\u5f97\u63d0\u524d\u51b3\u5b9a\u4e00\u4e2a\u4e0a\u9650&#xff0c;\u592a\u5c0f\u4e86\u4e0d\u591f\u7528&#xff0c;\u592a\u5927\u4e86\u53c8\u6d6a\u8d39\u7a7a\u95f4\u3002\u8fd9\u65f6\u5019&#xff0c;vector\u5c31\u50cf\u4e00\u4e2a\u795e\u5947\u7684\u6536\u7eb3\u76d2&#xff0c;\u5b83\u80fd\u6839\u636e\u4f60\u653e\u5165\u7684\u73a9\u5177\u6570\u91cf\u81ea\u52a8\u8c03\u6574\u5927\u5c0f&#xff01;<\/p>\n<h4>\u5b9a\u4e49\u4e0e\u7279\u70b9<\/h4>\n<ul>\n<li>\u52a8\u6001\u6570\u7ec4&#xff1a;vector\u662f\u4e00\u4e2a\u80fd\u591f\u5b58\u653e\u4efb\u610f\u7c7b\u578b\u7684\u52a8\u6001\u6570\u7ec4<\/li>\n<\/ul>\n<ul>\n<li>\u8fde\u7eed\u5185\u5b58&#xff1a;vector\u4e2d\u7684\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u8fde\u7eed\u5b58\u50a8&#xff0c;\u652f\u6301\u9ad8\u6548\u7684\u968f\u673a\u8bbf\u95ee<\/li>\n<\/ul>\n<ul>\n<li>\u81ea\u52a8\u6269\u5bb9&#xff1a;\u5f53\u7a7a\u95f4\u4e0d\u8db3\u65f6&#xff0c;vector\u4f1a\u81ea\u52a8\u5206\u914d\u66f4\u5927\u7684\u5185\u5b58\u7a7a\u95f4<\/li>\n<\/ul>\n<ul>\n<li>\u7c7b\u578b\u5b89\u5168&#xff1a;\u901a\u8fc7\u6a21\u677f\u673a\u5236\u786e\u4fdd\u7c7b\u578b\u5b89\u5168<\/li>\n<\/ul>\n<h4>vector\u7684\u5185\u90e8\u7ed3\u6784<\/h4>\n<p>\u4ece\u5b9e\u73b0\u539f\u7406\u4e0a\u770b&#xff0c;vector\u5185\u90e8\u7ef4\u62a4\u4e09\u4e2a\u5173\u952e\u6307\u9488&#xff1a;<\/p>\n<p>\u6307\u5411\u6570\u636e\u7684\u8d77\u59cb\u4f4d\u7f6e\u00a0\u2014\u2014\u00a0start<\/p>\n<p>\u6307\u5411\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e\u00a0\u2014\u2014\u00a0finish<\/p>\n<p>\u6307\u5411\u5206\u914d\u7684\u5185\u5b58\u7a7a\u95f4\u7684\u5c3e\u7aef\u00a0\u2014\u2014\u00a0end_of_storage<\/p>\n<\/p>\n<p>!vector\u5185\u90e8\u7ed3\u6784\u793a\u610f\u56fe<\/p>\n<p>\u8fd9\u5c31\u50cf\u4e00\u4e2a\u80fd\u4f38\u7f29\u7684\u5bbf\u820d&#xff1a;<\/p>\n<ul>\n<li>start\u662f\u5bbf\u820d\u7684\u95e8\u53e3<\/li>\n<\/ul>\n<ul>\n<li>finish\u662f\u6700\u540e\u4e00\u540d\u540c\u5b66\u7761\u7684\u5e8a\u4f4d\u540e\u9762\u4e00\u70b9\u7684\u4f4d\u7f6e<\/li>\n<\/ul>\n<ul>\n<li>end_of_storage\u662f\u5bbf\u820d\u7684\u5899\u58c1&#xff08;\u5bb9\u91cf\u4e0a\u9650&#xff09;<\/li>\n<\/ul>\n<h3>\u4e8c\u3001vector\u7684\u57fa\u672c\u64cd\u4f5c<\/h3>\n<h4>\u521b\u5efavector<\/h4>\n<p>#include\u00a0&lt;vector&gt;<\/p>\n<p>\/\/\u00a0\u521b\u5efa\u7a7avector<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec1;<\/p>\n<p>\/\/\u00a0\u521b\u5efa\u5305\u542b5\u4e2a\u5143\u7d20\u7684vector&#xff0c;\u6240\u6709\u5143\u7d20\u521d\u59cb\u5316\u4e3a0<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec2(5);<\/p>\n<p>\/\/\u00a0\u521b\u5efa\u5305\u542b5\u4e2a\u5143\u7d20\u7684vector&#xff0c;\u6240\u6709\u5143\u7d20\u521d\u59cb\u5316\u4e3a10<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec3(5,\u00a010);<\/p>\n<p>\/\/\u00a0\u4f7f\u7528\u521d\u59cb\u5316\u5217\u8868&#xff08;C&#043;&#043;11&#xff09;<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec4\u00a0&#061;\u00a0{1,\u00a02,\u00a03,\u00a04,\u00a05};<\/p>\n<p>\/\/\u00a0\u4ece\u6570\u7ec4\u521b\u5efavector<\/p>\n<p>int\u00a0arr[]\u00a0&#061;\u00a0{1,\u00a02,\u00a03,\u00a04,\u00a05};<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec5(arr,\u00a0arr\u00a0&#043;\u00a05);<\/p>\n<p>\/\/\u00a0\u4ece\u53e6\u4e00\u4e2avector\u521b\u5efa<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec6(vec5); <\/p>\n<p>\u8fd9\u5c31\u50cf\u4e0d\u540c\u7684\u65b9\u5f0f\u5f00party&#xff1a;\u53ef\u4ee5\u5148\u7a7a\u7740\u7b49\u4eba\u6765&#xff08;vec1&#xff09;&#xff0c;\u53ef\u4ee5\u5148\u9080\u8bf75\u4e2a\u4eba&#xff08;vec2&#xff09;&#xff0c;\u53ef\u4ee5\u5148\u9080\u8bf75\u4e2a\u7279\u5b9a\u7684\u670b\u53cb&#xff08;vec3&#xff09;&#8230;<\/p>\n<h4>\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20<\/h4>\n<p>std::vector&lt;int&gt;\u00a0vec;<\/p>\n<p>\/\/\u00a0\u5728\u5c3e\u90e8\u6dfb\u52a0\u5143\u7d20<\/p>\n<p>vec.push_back(10);\u00a0\u00a0\/\/\u00a0\u6dfb\u52a0\u5143\u7d2010\u5230\u5c3e\u90e8<\/p>\n<p>\/\/\u00a0\u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u5143\u7d20<\/p>\n<p>vec.insert(vec.begin()\u00a0&#043;\u00a01,\u00a020);\u00a0\u00a0\/\/\u00a0\u5728\u7b2c\u4e8c\u4e2a\u4f4d\u7f6e\u63d2\u516520<\/p>\n<p>\/\/\u00a0\u5220\u9664\u5c3e\u90e8\u5143\u7d20<\/p>\n<p>vec.pop_back();<\/p>\n<p>\/\/\u00a0\u5220\u9664\u6307\u5b9a\u4f4d\u7f6e\u7684\u5143\u7d20<\/p>\n<p>vec.erase(vec.begin()\u00a0&#043;\u00a01);\u00a0\u00a0\/\/\u00a0\u5220\u9664\u7b2c\u4e8c\u4e2a\u5143\u7d20<\/p>\n<p>\/\/\u00a0\u6e05\u7a7a\u6240\u6709\u5143\u7d20<\/p>\n<p>vec.clear(); <\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\u6392\u961f\u4e70\u7968&#xff1a;<\/p>\n<ul>\n<li>push_back\u662f\u6709\u4eba\u6765\u6392\u961f&#xff0c;\u81ea\u52a8\u7ad9\u5230\u961f\u5c3e<\/li>\n<\/ul>\n<ul>\n<li>insert\u662f\u6709\u4eba\u63d2\u961f\u5230\u6307\u5b9a\u4f4d\u7f6e<\/li>\n<\/ul>\n<ul>\n<li>pop_back\u662f\u6700\u540e\u4e00\u4e2a\u4eba\u4e0d\u60f3\u6392\u4e86&#xff0c;\u79bb\u5f00\u4e86<\/li>\n<\/ul>\n<ul>\n<li>erase\u662f\u961f\u4f0d\u4e2d\u95f4\u67d0\u4e2a\u4eba\u79bb\u5f00\u4e86<\/li>\n<\/ul>\n<ul>\n<li>clear\u662f\u7a81\u7136\u4e0b\u5927\u96e8&#xff0c;\u6240\u6709\u4eba\u90fd\u6563\u4e86<\/li>\n<\/ul>\n<h4>\u8bbf\u95ee\u5143\u7d20<\/h4>\n<p>std::vector&lt;int&gt;\u00a0vec\u00a0&#061;\u00a0{10,\u00a020,\u00a030,\u00a040,\u00a050};<\/p>\n<p>\/\/\u00a0\u4f7f\u7528\u7d22\u5f15\u8bbf\u95ee<\/p>\n<p>int\u00a0a\u00a0&#061;\u00a0vec[2];\u00a0\u00a0\/\/\u00a0\u83b7\u53d6\u7d22\u5f15\u4e3a2\u7684\u5143\u7d20&#xff08;30&#xff09;<\/p>\n<p>\/\/\u00a0\u4f7f\u7528at\u51fd\u6570&#xff08;\u5e26\u8fb9\u754c\u68c0\u67e5&#xff09;<\/p>\n<p>int\u00a0b\u00a0&#061;\u00a0vec.at(3);\u00a0\u00a0\/\/\u00a0\u83b7\u53d6\u7d22\u5f15\u4e3a3\u7684\u5143\u7d20&#xff08;40&#xff09;&#xff0c;\u8d8a\u754c\u4f1a\u629b\u51fa\u5f02\u5e38<\/p>\n<p>\/\/\u00a0\u83b7\u53d6\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u5143\u7d20<\/p>\n<p>int\u00a0first\u00a0&#061;\u00a0vec.front();\u00a0\u00a0\/\/\u00a0\u83b7\u53d6\u7b2c\u4e00\u4e2a\u5143\u7d20&#xff08;10&#xff09;<\/p>\n<p>int\u00a0last\u00a0&#061;\u00a0vec.back();\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u83b7\u53d6\u6700\u540e\u4e00\u4e2a\u5143\u7d20&#xff08;50&#xff09; <\/p>\n<p>\u8fd9\u5c31\u50cf\u627e\u6559\u5ba4\u91cc\u7684\u540c\u5b66&#xff1a;\u76f4\u63a5\u53eb\u53f7&#xff08;\u7d22\u5f15&#xff09;\u3001\u70b9\u540d\u786e\u8ba4&#xff08;at&#xff09;\u3001\u627e\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u3002<\/p>\n<h3>\u4e09\u3001vector\u7684\u5bb9\u91cf\u7ba1\u7406<\/h3>\n<p>\u7406\u89e3vector\u7684\u5bb9\u91cf\u7ba1\u7406\u662f\u638c\u63e1\u5176\u9ad8\u6548\u4f7f\u7528\u7684\u5173\u952e\u3002<\/p>\n<h4>size\u4e0ecapacity<\/h4>\n<ul>\n<li>size&#xff1a;\u5f53\u524dvector\u4e2d\u5b9e\u9645\u5143\u7d20\u7684\u4e2a\u6570<\/li>\n<\/ul>\n<ul>\n<li>capacity&#xff1a;\u5f53\u524dvector\u5728\u4e0d\u6269\u5bb9\u7684\u60c5\u51b5\u4e0b\u6700\u591a\u80fd\u5bb9\u7eb3\u7684\u5143\u7d20\u4e2a\u6570<\/li>\n<\/ul>\n<p>std::vector&lt;int&gt;\u00a0vec;<\/p>\n<p>for(int\u00a0i\u00a0&#061;\u00a00;\u00a0i\u00a0&lt;\u00a010;\u00a0i&#043;&#043;)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0vec.push_back(i);<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::cout\u00a0&lt;&lt;\u00a0&#034;Size:\u00a0&#034;\u00a0&lt;&lt;\u00a0vec.size()\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;&lt;\u00a0&#034;,\u00a0Capacity:\u00a0&#034;\u00a0&lt;&lt;\u00a0vec.capacity()\u00a0&lt;&lt;\u00a0std::endl;<\/p>\n<p>} <\/p>\n<p>\u53ef\u80fd\u7684\u8f93\u51fa\u7ed3\u679c&#xff1a;<\/p>\n<p>Size:\u00a01,\u00a0Capacity:\u00a01<\/p>\n<p>Size:\u00a02,\u00a0Capacity:\u00a02<\/p>\n<p>Size:\u00a03,\u00a0Capacity:\u00a04<\/p>\n<p>Size:\u00a04,\u00a0Capacity:\u00a04<\/p>\n<p>Size:\u00a05,\u00a0Capacity:\u00a08<\/p>\n<p>Size:\u00a06,\u00a0Capacity:\u00a08<\/p>\n<p>Size:\u00a07,\u00a0Capacity:\u00a08<\/p>\n<p>Size:\u00a08,\u00a0Capacity:\u00a08<\/p>\n<p>Size:\u00a09,\u00a0Capacity:\u00a016<\/p>\n<p>Size:\u00a010,\u00a0Capacity:\u00a016 <\/p>\n<p>\u8fd9\u5c31\u50cf\u4e00\u4e2a\u805a\u4f1a\u573a\u5730&#xff1a;<\/p>\n<ul>\n<li>size\u662f\u5b9e\u9645\u5230\u573a\u7684\u4eba\u6570<\/li>\n<\/ul>\n<ul>\n<li>capacity\u662f\u573a\u5730\u80fd\u5bb9\u7eb3\u7684\u6700\u5927\u4eba\u6570<\/li>\n<\/ul>\n<ul>\n<li>\u5f53\u4eba\u6570\u8d85\u8fc7\u5bb9\u91cf\u65f6&#xff0c;\u9700\u8981\u6362\u4e00\u4e2a\u66f4\u5927\u7684\u573a\u5730<\/li>\n<\/ul>\n<h4>\u6269\u5bb9\u539f\u7406<\/h4>\n<p>\u5f53vector\u9700\u8981\u66f4\u591a\u7a7a\u95f4\u65f6&#xff1a;<\/p>\n<li>\u5206\u914d\u4e00\u5757\u66f4\u5927\u7684\u5185\u5b58&#xff08;\u901a\u5e38\u662f\u5f53\u524d\u5bb9\u91cf\u76841.5\u500d\u62162\u500d&#xff09;<\/li>\n<li>\u5c06\u73b0\u6709\u5143\u7d20\u590d\u5236\u5230\u65b0\u5185\u5b58<\/li>\n<li>\u91ca\u653e\u65e7\u5185\u5b58<\/li>\n<li>\u66f4\u65b0\u5185\u90e8\u6307\u9488<\/li>\n<p>\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u505a\u91cd\u65b0\u5206\u914d(reallocation)&#xff0c;\u5b83\u662f\u8017\u65f6\u7684\u64cd\u4f5c&#xff0c;\u56e0\u4e3a\u9700\u8981\u590d\u5236\u6240\u6709\u5143\u7d20\u3002<\/p>\n<h4>\u4f18\u5316\u5bb9\u91cf\u7ba1\u7406<\/h4>\n<p>\/\/\u00a0\u9884\u7559\u7a7a\u95f4&#xff0c;\u907f\u514d\u9891\u7e41\u6269\u5bb9<\/p>\n<p>vec.reserve(1000);\u00a0\u00a0\/\/\u00a0\u9884\u5206\u914d\u81f3\u5c11\u80fd\u5bb9\u7eb31000\u4e2a\u5143\u7d20\u7684\u7a7a\u95f4<\/p>\n<p>\/\/\u00a0\u8c03\u6574\u5927\u5c0f&#xff08;\u4f1a\u6539\u53d8size&#xff09;<\/p>\n<p>vec.resize(100);\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u8c03\u6574\u4e3a100\u4e2a\u5143\u7d20&#xff0c;\u5982\u679c\u6269\u5927\u5219\u7528\u9ed8\u8ba4\u503c\u586b\u5145<\/p>\n<p>\/\/\u00a0\u51cf\u5c11\u5bb9\u91cf\u4ee5\u9002\u5e94\u5f53\u524d\u5927\u5c0f<\/p>\n<p>vec.shrink_to_fit();\u00a0\u00a0\/\/\u00a0C&#043;&#043;11\u5f15\u5165<\/p>\n<ul>\n<li>reserve\u662f\u63d0\u524d\u79df\u4e00\u4e2a\u8db3\u591f\u5927\u7684\u573a\u5730&#xff0c;\u907f\u514d\u4e2d\u9014\u6362\u573a\u5730<\/li>\n<\/ul>\n<ul>\n<li>resize\u662f\u4e3b\u52a8\u8c03\u6574\u805a\u4f1a\u4eba\u6570<\/li>\n<\/ul>\n<ul>\n<li>shrink_to_fit\u662f\u5728\u4eba\u5230\u9f50\u540e&#xff0c;\u6362\u4e00\u4e2a\u521a\u597d\u591f\u7528\u7684\u5c0f\u573a\u5730&#xff0c;\u8282\u7701\u8d39\u7528<\/li>\n<\/ul>\n<h3>\u56db\u3001vector\u7684\u8fed\u4ee3\u5668<\/h3>\n<p>\u8fed\u4ee3\u5668\u662f\u8bbf\u95ee\u5bb9\u5668\u5143\u7d20\u7684\u7edf\u4e00\u63a5\u53e3&#xff0c;\u5c31\u50cf&#034;\u667a\u80fd\u6307\u9488&#034;\u3002<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec\u00a0&#061;\u00a0{10,\u00a020,\u00a030,\u00a040,\u00a050};<\/p>\n<p>\/\/\u00a0\u4f7f\u7528\u8fed\u4ee3\u5668\u904d\u5386<\/p>\n<p>for(std::vector&lt;int&gt;::iterator\u00a0it\u00a0&#061;\u00a0vec.begin();\u00a0it\u00a0!&#061;\u00a0vec.end();\u00a0&#043;&#043;it)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::cout\u00a0&lt;&lt;\u00a0*it\u00a0&lt;&lt;\u00a0&#034;\u00a0&#034;;\u00a0\u00a0\/\/\u00a0\u8f93\u51fa&#xff1a;10\u00a020\u00a030\u00a040\u00a050<\/p>\n<p>}<\/p>\n<p>\/\/\u00a0C&#043;&#043;11\u5f15\u5165\u7684\u8303\u56f4for\u5faa\u73af&#xff08;\u8bed\u6cd5\u7cd6&#xff09;<\/p>\n<p>for(auto&amp;\u00a0element\u00a0:\u00a0vec)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::cout\u00a0&lt;&lt;\u00a0element\u00a0&lt;&lt;\u00a0&#034;\u00a0&#034;;\u00a0\u00a0\/\/\u00a0\u8f93\u51fa\u540c\u4e0a<\/p>\n<p>}<\/p>\n<p>\/\/\u00a0\u53cd\u5411\u8fed\u4ee3\u5668<\/p>\n<p>for(std::vector&lt;int&gt;::reverse_iterator\u00a0rit\u00a0&#061;\u00a0vec.rbegin();\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0rit\u00a0!&#061;\u00a0vec.rend();\u00a0&#043;&#043;rit)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::cout\u00a0&lt;&lt;\u00a0*rit\u00a0&lt;&lt;\u00a0&#034;\u00a0&#034;;\u00a0\u00a0\/\/\u00a0\u8f93\u51fa&#xff1a;50\u00a040\u00a030\u00a020\u00a010<\/p>\n<p>} <\/p>\n<p>\u8fd9\u5c31\u50cf\u53c2\u89c2\u535a\u7269\u9986&#xff1a;<\/p>\n<ul>\n<li>\u666e\u901a\u8fed\u4ee3\u5668\u662f\u4ece\u5165\u53e3\u5230\u51fa\u53e3\u7684\u53c2\u89c2\u8def\u7ebf<\/li>\n<\/ul>\n<ul>\n<li>\u53cd\u5411\u8fed\u4ee3\u5668\u662f\u4ece\u51fa\u53e3\u56de\u5230\u5165\u53e3\u7684\u8def\u7ebf<\/li>\n<\/ul>\n<ul>\n<li>\u8303\u56f4for\u5faa\u73af\u5c31\u662f\u8ddf\u7740\u5bfc\u6e38\u8d70&#xff0c;\u4e0d\u7528\u62c5\u5fc3\u8def\u7ebf<\/li>\n<\/ul>\n<h3>\u4e94\u3001vector\u7684\u5e38\u89c1\u9677\u9631\u4e0e\u4f18\u5316<\/h3>\n<h4>1.\u00a0\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898<\/h4>\n<p>\u5f53vector\u6269\u5bb9\u6216\u5220\u9664\u5143\u7d20\u65f6&#xff0c;\u8fed\u4ee3\u5668\u53ef\u80fd\u4f1a\u5931\u6548&#xff1a;<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec\u00a0&#061;\u00a0{1,\u00a02,\u00a03,\u00a04,\u00a05};<\/p>\n<p>auto\u00a0it\u00a0&#061;\u00a0vec.begin()\u00a0&#043;\u00a02;\u00a0\u00a0\/\/\u00a0\u6307\u5411\u5143\u7d203<\/p>\n<p>vec.insert(vec.begin(),\u00a00);\u00a0\u00a0\/\/\u00a0\u53ef\u80fd\u5bfc\u81f4\u6269\u5bb9<\/p>\n<p>\/\/\u00a0\u6b64\u65f6it\u5df2\u5931\u6548&#xff0c;\u4f7f\u7528it\u5c06\u5bfc\u81f4\u672a\u5b9a\u4e49\u884c\u4e3a <\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5&#xff1a;\u5728\u53ef\u80fd\u5bfc\u81f4\u8fed\u4ee3\u5668\u5931\u6548\u7684\u64cd\u4f5c\u540e&#xff0c;\u91cd\u65b0\u83b7\u53d6\u8fed\u4ee3\u5668\u3002<\/p>\n<h4>2.\u00a0\u4e0d\u5fc5\u8981\u7684\u590d\u5236<\/h4>\n<p>\/\/\u00a0\u4f4e\u6548\u7684\u5faa\u73af\u6dfb\u52a0\u5143\u7d20<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec;<\/p>\n<p>for(int\u00a0i\u00a0&#061;\u00a00;\u00a0i\u00a0&lt;\u00a010000;\u00a0i&#043;&#043;)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0vec.push_back(i);\u00a0\u00a0\/\/\u00a0\u53ef\u80fd\u591a\u6b21\u6269\u5bb9<\/p>\n<p>}<\/p>\n<p>\/\/\u00a0\u4f18\u5316&#xff1a;\u9884\u5148\u5206\u914d\u8db3\u591f\u7a7a\u95f4<\/p>\n<p>std::vector&lt;int&gt;\u00a0vec2;<\/p>\n<p>vec2.reserve(10000);\u00a0\u00a0\/\/\u00a0\u63d0\u524d\u5206\u914d\u7a7a\u95f4<\/p>\n<p>for(int\u00a0i\u00a0&#061;\u00a00;\u00a0i\u00a0&lt;\u00a010000;\u00a0i&#043;&#043;)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0vec2.push_back(i);\u00a0\u00a0\/\/\u00a0\u907f\u514d\u6269\u5bb9<\/p>\n<p>} <\/p>\n<h4>3. \u8fd4\u56de\u503c\u4f18\u5316<\/h4>\n<p>\/\/\u00a0\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u590d\u5236<\/p>\n<p>void\u00a0processVector(const\u00a0std::vector&lt;int&gt;&amp;\u00a0vec)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u4f7f\u7528const\u5f15\u7528\u4f5c\u4e3a\u53c2\u6570<\/p>\n<p>}<\/p>\n<p>std::vector&lt;int&gt;\u00a0createVector()\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::vector&lt;int&gt;\u00a0result\u00a0&#061;\u00a0{1,\u00a02,\u00a03};<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0return\u00a0result;\u00a0\u00a0\/\/\u00a0\u7f16\u8bd1\u5668\u4f1a\u4f18\u5316&#xff0c;\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u590d\u5236<\/p>\n<p>} <\/p>\n<h3>\u516d\u3001\u5b9e\u9645\u5e94\u7528\u6848\u4f8b<\/h3>\n<h4>\u6848\u4f8b1&#xff1a;\u52a8\u6001\u4e8c\u7ef4\u6570\u7ec4<\/h4>\n<p>\/\/\u00a0\u521b\u5efa10&#215;20\u7684\u4e8c\u7ef4\u6570\u7ec4<\/p>\n<p>std::vector&lt;std::vector&lt;int&gt;&gt;\u00a0matrix(10,\u00a0std::vector&lt;int&gt;(20,\u00a00));<\/p>\n<p>\/\/\u00a0\u8bbf\u95ee\u5143\u7d20<\/p>\n<p>matrix[5][10]\u00a0&#061;\u00a0100;<\/p>\n<p>\/\/\u00a0\u52a8\u6001\u8c03\u6574\u884c\u6570<\/p>\n<p>matrix.resize(15);\u00a0\u00a0\/\/\u00a0\u73b0\u5728\u662f15&#215;20 <\/p>\n<h4>\u6848\u4f8b2&#xff1a;\u9ad8\u6548\u5b57\u7b26\u4e32\u5206\u5272<\/h4>\n<p>std::vector&lt;std::string&gt;\u00a0split(const\u00a0std::string&amp;\u00a0str,\u00a0char\u00a0delimiter)\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::vector&lt;std::string&gt;\u00a0tokens;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::string\u00a0token;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::istringstream\u00a0tokenStream(str);<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0while\u00a0(std::getline(tokenStream,\u00a0token,\u00a0delimiter))\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0tokens.push_back(token);<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0}<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0return\u00a0tokens;<\/p>\n<p>} <\/p>\n<h4>\u6848\u4f8b3&#xff1a;\u81ea\u5b9a\u4e49\u5bf9\u8c61\u7684\u5b58\u50a8<\/h4>\n<p>struct\u00a0Student\u00a0{<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0std::string\u00a0name;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0int\u00a0age;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0Student(const\u00a0std::string&amp;\u00a0n,\u00a0int\u00a0a)\u00a0:\u00a0name(n),\u00a0age(a)\u00a0{}<\/p>\n<p>};<\/p>\n<p>std::vector&lt;Student&gt;\u00a0students;<\/p>\n<p>students.push_back(Student(&#034;\u5c0f\u660e&#034;,\u00a018));<\/p>\n<p>students.push_back(Student(&#034;\u5c0f\u7ea2&#034;,\u00a017));<\/p>\n<p>\/\/\u00a0C&#043;&#043;11\u7684emplace_back\u53ef\u4ee5\u5728\u5bb9\u5668\u5185\u76f4\u63a5\u6784\u9020\u5bf9\u8c61&#xff0c;\u907f\u514d\u590d\u5236<\/p>\n<p>students.emplace_back(&#034;\u5c0f\u521a&#034;,\u00a019); 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