{"id":39993,"date":"2023-12-11T14:49:25","date_gmt":"2023-12-11T06:49:25","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=39993"},"modified":"2023-12-11T14:49:25","modified_gmt":"2023-12-11T06:49:25","slug":"%e8%af%b7%e4%bd%a0%e5%9b%9e%e7%ad%94%e4%b8%80%e4%b8%8bstl%e9%87%8cresize%e5%92%8creserve%e7%9a%84%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e8%af%b7%e4%bd%a0%e5%9b%9e%e7%ad%94%e4%b8%80%e4%b8%8bstl%e9%87%8cresize%e5%92%8creserve%e7%9a%84%e5%8c%ba%e5%88%ab%ef%bc%9f\/","title":{"rendered":"\u8bf7\u4f60\u56de\u7b54\u4e00\u4e0bSTL\u91ccresize\u548creserve\u7684\u533a\u522b\uff1f"},"content":{"rendered":"<p>&#8220;`&#8221;                    resize()\uff1a\u6539\u53d8\u5f53\u524d\u5bb9\u5668\u5185\u542b\u6709\u5143\u7d20\u7684\u6570\u91cf(size())\uff0ceg: vector<int>v; v.resize(len);v\u7684size\u53d8\u4e3alen,\u5982\u679c\u539f\u6765v\u7684size\u5c0f\u4e8elen\uff0c\u90a3\u4e48\u5bb9\u5668\u65b0\u589e\uff08len-size\uff09\u4e2a\u5143\u7d20\uff0c\u5143\u7d20\u7684\u503c\u4e3a\u9ed8\u8ba4\u4e3a0.\u5f53v.push_back(3);\u4e4b\u540e\uff0c\u5219\u662f3\u662f\u653e\u5728\u4e86v\u7684\u672b\u5c3e\uff0c\u5373\u4e0b\u6807\u4e3alen\uff0c\u6b64\u65f6\u5bb9\u5668\u662fsize\u4e3alen+1\uff1b<\/int><\/p>\n<p>\u00a0<\/p>\n<p>&lt;pre&gt;&lt;code&gt;#include &lt;iostream&gt;#include &lt;vector&gt;using namespace std;int main() {    vector&lt;int&gt; a;    a.reserve(100);    a.resize(50);    cout&lt;&lt;a.size()&lt;&lt;&quot;&quot;  &quot;&quot;&lt;&lt;a.capacity()&lt;&lt;endl;        \/\/50  100    a.resize(150);    cout&lt;&lt;a.size()&lt;&lt;&quot;&quot;  &quot;&quot;&lt;&lt;a.capacity()&lt;&lt;endl;        \/\/150  200    a.reserve(50);    cout&lt;&lt;a.size()&lt;&lt;&quot;&quot;  &quot;&quot;&lt;&lt;a.capacity()&lt;&lt;endl;        \/\/150  200    a.resize(50);    cout&lt;&lt;a.size()&lt;&lt;&quot;&quot;  &quot;&quot;&lt;&lt;a.capacity()&lt;&lt;endl;        \/\/50  200    }&lt;\/code&gt;&lt;\/pre&gt;<\/p>\n<p>\u00a0<\/p>\n<p>&lt;pre&gt;&lt;code&gt;            &quot;&#8220;`<br \/>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; resize()\uff1a\u6539\u53d8\u5f53\u524d\u5bb9\u5668\u5185\u542b\u6709\u5143\u7d20\u7684\u6570\u91cf(size())\uff0ceg: vec [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-39993","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=39993"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39993\/revisions"}],"predecessor-version":[{"id":39994,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39993\/revisions\/39994"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=39993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=39993"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=39993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}