\u4eca\u5929\u5728leetcode\u4e0a\u770b\u5230\u4e86\u4e00\u4e2a\u4ee5\u524d\u6ca1\u89c1\u8fc7\u7684c++\u904d\u5386\u5bb9\u5668\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
unordered_map<int,int> map;\n for(auto& [_,v] : map)\n {\n cout<<v<<endl;\n }<\/code><\/pre>\n\n\n\n\u7136\u540e\u627e\u4e86\u4e0b\u624d\u660e\u767d\uff0c\u8fd9\u662fc++ 17\u5f15\u5165\u7684\u4e00\u4e2a\u65b0\u7684\u8bed\u6cd5\u7cd6\uff0c\u53ebstructure binding\u3002<\/p>\n\n\n\n
\u5f88\u597d\u5f88\u5f3a\u5927\uff0c\u7ec8\u4e8e\u80fd\u548cpython\u4e00\u6837\u65b9\u4fbf\u7684\u6bd4\u54ea\u91cc\u4e86\uff0c\u7c7b\u4f3c for k,v in m.items(),\u8212\u670d<\/p>\n\n\n\n
\u4e0b\u9762\u662f\u6211\u7b80\u5355\u8bd5\u8bd5range based for \u548cstructure binding\u7684\u5c0f\u7a0b\u5e8f<\/p>\n\n\n\n
#include <iostream>\n#include <unordered_map>\nusing namespace std;\nclass A_iter;\nclass A\n{\n private:\n int m_data[100];\n int m_length;\n public:\n A();\n void append(int);\n A_iter begin();\n A_iter end();\n int operator[](int x) const;\n};\nclass A_iter\n{\n private:\n A* m_a;\n int m_pos;\n public:\n A_iter(A* a,int p);\n void operator++();\n bool operator==(A_iter o) const;\n bool operator!=(A_iter o) const;\n int operator*() const;\n};\nint A_iter::operator*() const\n{\n return ((*m_a)[m_pos]);\n}\nbool A_iter::operator!=(A_iter o) const\n{\n return !(*this==o);\n}\nbool A_iter::operator==(A_iter o) const\n{\n return m_a==o.m_a && m_pos==o.m_pos;\n}\nA_iter::A_iter(A* a,int p)\n{\n m_a = a;\n m_pos = p;\n}\nvoid A_iter::operator++()\n{\n m_pos++;\n}\nA::A()\n{\n m_length = 0;\n}\nvoid A::append(int x)\n{\n m_data[m_length++] = x;\n}\nA_iter A::begin()\n{\n return A_iter(this,0);\n}\nint A::operator[](int x) const\n{\n return m_data[x];\n}\nA_iter A::end()\n{\n return A_iter(this,m_length);\n}\n\n\nint main()\n{\n A a;\n a.append(3);\n a.append(4);\n a.append(5);\n for(auto it=a.begin();it!=a.end();++it)\n {\n cout<<*(it)<<endl;\n }\n unordered_map<int,int> m;\n m.insert({1,2});\n m.insert({3,4});\n m.insert({5,6});\n for(auto& [k,v]:m)\n {\n cout<<k<<\" \"<<v<<endl;\n }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u4eca\u5929\u5728leetcode\u4e0a\u770b\u5230\u4e86\u4e00\u4e2a\u4ee5\u524d\u6ca1\u89c1\u8fc7\u7684c++\u904d\u5386\u5bb9\u5668\u7684\u65b9\u6cd5\uff1a \u7136\u540e\u627e\u4e86\u4e0b\u624d\u660e\u767d\uff0c\u8fd9\u662fc++ … \u7ee7\u7eed\u9605\u8bfb c++17 structure binding<\/span><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":{"0":"post-29","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-c_plus_plus","7":"h-entry","9":"h-as-article"},"_links":{"self":[{"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/posts\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/iamnear.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29"}],"version-history":[{"count":2,"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/posts\/29\/revisions"}],"predecessor-version":[{"id":31,"href":"http:\/\/iamnear.top\/index.php?rest_route=\/wp\/v2\/posts\/29\/revisions\/31"}],"wp:attachment":[{"href":"http:\/\/iamnear.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/iamnear.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/iamnear.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}