{"id":200412,"date":"2020-11-14T02:19:17","date_gmt":"2020-11-13T18:19:17","guid":{"rendered":"http:\/\/4563.org\/?p=200412"},"modified":"2020-11-14T02:19:17","modified_gmt":"2020-11-13T18:19:17","slug":"%e6%b1%82%e9%97%ae%ef%bc%8c-c-%e4%b8%ad%e5%a6%82%e4%bd%95%e6%8f%90%e4%be%9b%e6%8e%a5%e5%8f%a3%e8%ae%a9%e7%94%a8%e6%88%b7%e5%8f%98%e9%87%8f%e7%a7%81%e6%9c%89%e6%88%90%e5%91%98%e5%8f%98%e9%87%8f-vecto","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=200412","title":{"rendered":"\u6c42\u95ee\uff0c C++ \u4e2d\u5982\u4f55\u63d0\u4f9b\u63a5\u53e3\u8ba9\u7528\u6237\u53d8\u91cf\u79c1\u6709\u6210\u5458\u53d8\u91cf vector"},"content":{"rendered":"
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\u6c42\u95ee\uff0c C++ \u4e2d\u5982\u4f55\u63d0\u4f9b\u63a5\u53e3\u8ba9\u7528\u6237\u53d8\u91cf\u79c1\u6709\u6210\u5458\u53d8\u91cf vector <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : NeilZhy1 <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u7528 C++ \u5b9a\u4e49\u4e86\u4e00\u4e2a\u7c7b\uff0c\u7c7b\u5185\u90e8\u5b9a\u4e49\u4e86\u4e00\u4e2a\u79c1\u6709\u6210\u5458\u53d8\u91cf vector\uff0c\u5982\u4f55\u63d0\u4f9b\u63a5\u53e3\u8ba9\u7528\u6237\u80fd\u591f\u8bbf\u95ee\u8fd9\u4e2a\u53d8\u91cf\u8fd9\u4e2a vector<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (11<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Tony042 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7528 get set \u51fd\u6570\u63d0\u4f9b\u8fd9\u4e2a vector \u7684\u5f15\u7528\u6216\u8005\u62f7\u8d1d\u5c31\u53ef\u4ee5\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kilasuelika <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd4\u56de\u4e00\u4e2a const \u5f15\u7528\u3002
    class A{
    public:
    const vector<int>& get_v(){
    }
    } <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kilasuelika <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    V2EX \u6ca1\u6709\u5220\u9664\u529f\u80fd\uff1f\u4e0a\u4e00\u4e2a\u6ca1\u6709\u5199\u5b8c\u3002<\/p>\n

    \u8fd4\u56de\u4e00\u4e2a const \u5f15\u7528\u3002
    class A{
    public:
    const vector<int>& get_v(){<\/p>\n

    }
    } <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kilasuelika <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd4\u56de\u4e00\u4e2a const \u5f15\u7528\u3002
    class A{
    public:
    const vector<int>& get_v(){
    return v;
    };
    private:
    vector<int> v;
    }; <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : NeilZhy1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @kilasuelika \u8c8c\u4f3c\u662f\u53ef\u4ee5\u7684\u54c8\uff0c\u8fd4\u56de\u5f15\u7528\u4e5f\u6ca1\u6709\u6570\u636e\u7684\u62f7\u8d1d\u7684\u5bf9\u5427\uff0c\u56e0\u4e3a vector<int> v; \u6570\u636e\u91cf\u6bd4\u8f83\u5927\uff0c\u63a5\u53e3\u8c03\u7528\u4e5f\u6bd4\u8f83\u9891\u7e41 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kilasuelika <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @NeilZhy1 \u6709\u6ca1\u6709\u6570\u636e\u590d\u5236\uff0c\u8981\u770b\u5bf9\u65b9\u662f\u600e\u4e48\u63a5\u6536\u6570\u636e\u7684\u3002\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

    #include <iostream>
    #include<vector><\/p>\n

    class A {
    public:
    A():v(2,0) {
    std::cout << v.data() << ” “;
    };
    const std::vector<int>& get_v() {
    return v;
    };
    private:
    std::vector<int> v;
    };<\/p>\n

    int main()
    {
    A a;
    auto v0 = a.get_v(); \/\/\u4e0d\u5171\u4eab\u6570\u636e
    auto& v0_r = a.get_v(); \/\/\u5171\u4eab\u6570\u636e
    const std::vector<int>& v1 = a.get_v(); \/\/\u5171\u4eab\u6570\u636e
    std::vector<int> v2 = a.get_v(); \/\/\u4e0d\u5171\u4eab\u6570\u636e
    std::cout <<v0.data()<<” “<<v0_r.data()<<” “<< v1.data() << ” ” << v2.data() << std::endl;
    };<\/p>\n

    1. auto \u5173\u952e\u5b57\u4e0d\u8003\u8651\u5f15\u7528\uff0c\u9ed8\u8ba4\u662f\u6ca1\u6709\u5f15\u7528\u7684\uff0c\u6240\u4ee5\u76f8\u5f53\u4e8e\u7528\u4e00\u4e2a\u5f15\u7528\u6765\u6784\u9020\u4e00\u4e2a\u65b0\u7684 v0\uff0c\u6240\u4ee5\u6ca1\u6709\u5171\u4eab\u6570\u636e\uff0c\u6709\u590d\u5236\u3002
    2. a \u4e0e v0_r, v1 \u662f\u5171\u4eab\u6570\u636e\u7684\uff0cv0 \u548c v2 \u662f\u65b0\u7684\u53d8\u91cf\uff0c\u53d1\u751f\u4e86\u6570\u636e\u590d\u5236\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lifetimeporn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    const vector GetVector() const
    {
    return YourVector;
    } <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : NeilZhy1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @kilasuelika \u4e86\u89e3\u5566\uff0c\u591a\u8c22 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : whi147 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd8\u6709\u53cb\u5143\u51fd\u6570\u4e5f\u53ef\u4ee5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : whi147 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd8\u53ef\u4ee5\u65b0\u5199\u4e2a\u7c7b\u8fdb\u884c\u62f7\u8d1d\u6784\u9020\uff0c\u65b9\u6cd5\u5f88\u591a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : whi147 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8981\u662f\u60f3\u4e0d\u8fdb\u884c\u62f7\u8d1d\u5c31\u79fb\u52a8\u6784\u9020 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u6c42\u95ee\uff0c C++ \u4e2d\u5982\u4f55\u63d0\u4f9b\u63a5\u53e3\u8ba9\u7528…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/200412"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=200412"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/200412\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=200412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=200412"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=200412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}