{"id":335,"date":"2020-03-22T14:19:39","date_gmt":"2020-03-22T06:19:39","guid":{"rendered":"https:\/\/www.notown.club\/?p=335"},"modified":"2020-08-22T15:54:49","modified_gmt":"2020-08-22T07:54:49","slug":"c%e5%ad%97%e7%ac%a6%e4%b8%b2%e3%80%81%e5%90%91%e9%87%8f%e3%80%81%e6%95%b0%e7%bb%84%ef%bc%88%e7%ac%94%e8%ae%b0%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=335","title":{"rendered":"C++\u5b57\u7b26\u4e32\u3001\u5411\u91cf\u3001\u6570\u7ec4\uff08\u7b14\u8bb0\u4e00\uff09"},"content":{"rendered":"\n

\u4e00\u3001string\u5bf9\u8c61\u7684\u521d\u59cb\u5316<\/strong><\/p>\n\n\n\n

string s1  \/\/s1\u662f\u7a7a\u4e32
string s2(s1) \/\/s2\u662fs1\u7684\u526f\u672c
string s2=s1  \/\/\u540c\u4e0a
string s3(\"value\")  \/\/s3\u662f\u5b57\u9762\u503c\u201dvalue\u201d\uff0c\uff08\u5f53\u7136\u8fd8\u6709\u4e2a\u7a7a\u5b57\u7b26\u4e32\uff09
string s3=\"value\"  \/\/\u540c\u4e0a
string s4=(n, \u2019c\u2019)  \/\/\u628as4\u521d\u59cb\u5316\u7531\u8fde\u7eedn\u4e2a\u5b57\u7b26c\u7ec4\u6210\u7684\u4e32<\/code><\/pre>\n\n\n\n
\u4e8c\u3001string\u5bf9\u8c61\u7684\u4e00\u4e9b\u64cd\u4f5c<\/strong><\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5f53\u628astring\u5bf9\u8c61\u548c\u5b57\u7b26\u5b57\u9762\u503c\u53ca\u5b57\u7b26\u4e32\u5b57\u9762\u503c\u6df7\u5728\u4e00\u6761\u8bed\u53e5\u4e2d\u4f7f\u7528\u65f6\uff0c\u5fc5\u987b\u786e\u4fdd\u52a0\u6cd5\u8fd0\u7b97\u7b26\u4e24\u4fa7\u7684\u8fd0\u7b97\u5bf9\u8c61\u81f3\u5c11\u6709\u4e00\u4e2a\u662fstring<\/strong><\/p>\n\n\n\n
string s1 = \"\u54c8\u54c8\u54c8\u54c8\u54c8\u554a\";
string s4 =s1 +\u201d,\u201d;       \/\/\u6b63\u786e
string s5 =s1+\u201dhello\u201d+\u201d,\u201d  \/\/\u6b63\u786e\uff0c\u76f8\u5f53\u4e8e\u5148\u8fdb\u884c\u7b2c\u4e00\u4e2a\u52a0\u53f7\u7684\u8fd0\u7b97\u5f97\u5230\u4e00\u4e2astring\u518d\u8fdb\u884c\u7b2c\u4e8c\u4e2a
string s6 =\u201dhello\u201d+\u201d,\u201d+ s1  \/\/\u9519\u8bef\uff0c\u7b2c\u4e00\u4e2a\u52a0\u53f7\u7684\u8fd0\u7b97\uff0c\u4e24\u4e2a\u52a0\u6570\u90fd\u4e0d\u662fstring<\/code><\/pre>\n\n\n\n
\u5904\u7406\u5355\u4e2a\u5b57\u7b26\u65f6\uff1a<\/strong>
\u5904\u7406\u6bcf\u4e2a\u5b57\u7b26
for(auto var: str)      \/\/\u9002\u7528\u4e8e\u4e0d\u6539\u53d8\u539f\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\uff0c\u53ea\u53d6\u503c\u505a\u5904\u7406
for(auto &var: str)    \/\/\u53ef\u4ee5\u6539\u53d8\u539f\u5b57\u7b26\u4e32\u7684\u6bcf\u4e2a\u5b57\u7b26<\/code>
    \u4e0b\u6807\u8fd0\u7b97\u7b26[]\u63a5\u6536\u7684\u53c2\u6570\u662fstring::size_type\u7c7b\u578b\u7684\u503c\uff0c\u8fd9\u4e2a\u53c2\u6570\u8868\u793a\u8981\u8bbf\u95ee\u7684\u5b57\u7b26\u7684\u4f4d\u7f6e\uff0c\u8fd4\u56de\u503c\u662f\u8be5\u4f4d\u7f6e\u4e0a\u5b57\u7b26\u7684\u5f15\u7528\u3002string\u7684\u4e0b\u6807\u4ece0\u7b97\u8d77\uff0c\u6bd4\u5982str[0]\u662f\u7b2c\u4e00\u4e2a\u5b57\u7b26\uff0cstr[1]\u662f\u7b2c\u4e8c\u4e2a\u5b57\u7b26\uff0cstr[str.size()-1]\u662f\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u4e09\u3001\u6807\u51c6\u5e93vector<\/strong><\/p>\n\n\n\n
    \u6807\u51c6\u5e93\u7c7b\u578bvector\u8868\u793a\u5bf9\u8c61\u7684\u96c6\u5408\uff0c\u5176\u4e2d\u6240\u6709\u5bf9\u8c61\u7684\u7c7b\u578b\u90fd\u76f8\u540c<\/strong>\u3002\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u4e0e\u4e4b\u5bf9\u5e94\u7684\u7d22\u5f15\uff0c\u7d22\u5f15<\/strong>\u7528\u4e8e\u8bbf\u95ee\u5bf9\u8c61\u3002\u56e0\u4e3avector\u201c\u5bb9\u7eb3\u7740\u201d\u5176\u4ed6\u5bf9\u8c61\uff0c\u6240\u4ee5\u5b83\u4e5f\u5e38\u88ab\u79f0\u4f5c\u5bb9\u5668<\/strong>\u3002
    C++\u8bed\u8a00\u4e2d\u65e2\u6709\u7c7b\u6a21\u677f\uff0c\u4e5f\u6709\u51fd\u6570\u6a21\u677f\uff0c\u5176\u4e2dvector\u662f\u4e00\u4e2a\u7c7b\u6a21\u677f\u3002\u6a21\u677f\u672c\u8eab\u4e0d\u662f\u7c7b\u6216\u8005\u51fd\u6570\uff0c\u76f8\u53cd\u53ef\u4ee5\u5c06\u6a21\u677f\u770b\u4f5c\u4e3a\u7f16\u8bd1\u5668\u751f\u6210\u7c7b\u6216\u8005\u51fd\u6570\u7f16\u5199\u7684\u4e00\u4efd\u8bf4\u660e\u3002\u7f16\u8bd1\u5668\u6839\u636e\u6a21\u677f\u521b\u5efa\u7c7b\u6216\u51fd\u6570\u7684\u8fc7\u7a0b\u79f0\u4e3a\u5b9e\u4f8b\u5316\uff0c\u5f53\u4f7f\u7528\u6a21\u677f\u65f6\uff0c\u9700\u8981\u503c\u51fa\u7f16\u8bd1\u5668\u5e94\u628a\u7c7b\u6216\u51fd\u6570\u5b9e\u4f8b\u5316\u6210\u4f55\u79cd\u7c7b\u578b\uff0c\u5373\u5728\u6a21\u677f\u540d\u5b57\u540e\u9762\u8ddf\u4e00\u5bf9\u5c16\u62ec\u53f7\uff0c\u5728\u62ec\u53f7\u5185\u586b\u7c7b\u578b\u3002<\/p>\n\n\n\n
vector<int> ivec;      \/\/ivec\u4fdd\u5b58int\u7c7b\u578b\u7684\u5bf9\u8c61\nvector<Sales_item<\/code>> Sales_vec;  \/\/Sales_vec\u4fdd\u5b58Sales_item\u7c7b\u578b\u7684\u5bf9\u8c61\nvector<vector<int>>  f;    \/\/\u8be5\u5411\u91cf\u7684\u5143\u7d20\u662fvector\u5bf9\u8c61<\/code><\/pre>\n\n\n\n
\u5b9a\u4e49\u548c\u521d\u59cb\u5316vector\u5bf9\u8c61<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5217\u8868\u521d\u59cb\u5316\u503c\u8fd8\u662f\u5143\u7d20\u6570\u91cf\uff1a<\/p>\n\n\n\n
vector<int> v1(10);   \/\/v1\u670910\u4e2a\u5143\u7d20\uff0c\u6bcf\u4e2a\u7684\u503c\u90fd0\nvector<int> v2{10};   \/\/v2\u67091\u4e2a\u5143\u7d20\uff0c\u5176\u503c\u4e3a10\nvector<int> v3(10,1);  \/\/v3\u670910\u4e2a\u5143\u7d20\uff0c\u5176\u503c\u90fd\u4e3a1\nvector<int> v4{10,1}  \/\/v4\u67092\u4e2a\u5143\u7d20\uff0c\u5176\u503c\u5206\u522b\u4e3a10\u548c1<\/code><\/pre>\n\n\n\n
    \u8981\u60f3\u5217\u8868\u521d\u59cb\u5316vector\u5bf9\u8c61\uff0c\u82b1\u62ec\u53f7\u91cc\u7684\u503c\u5fc5\u987b\u4e0e\u5143\u7d20\u7c7b\u578b\u76f8\u540c<\/strong>\u3002\u663e\u7136\u4e0d\u80fd\u7528int\u521d\u59cb\u5316string\u5bf9\u8c61\uff0c\u6240\u4ee5v7\u548cv8\u63d0\u4f9b\u7684\u503c\u4e0d\u80fd\u4f5c\u4e3a\u5143\u7d20\u7684\u521d\u59cb\u503c\u3002\u786e\u8ba4\u65e0\u6cd5\u6267\u884c\u5217\u8868\u521d\u59cb\u5316\u540e\uff0c\u7f16\u8bd1\u5668\u4f1a\u5c1d\u8bd5\u7528\u9ed8\u8ba4\u503c\u521d\u59cb\u5316vector\u5bf9\u8c61<\/strong>\uff0c\u4f8b\uff1a<\/p>\n\n\n\n
vector<string> v5{\u201chi\u201d};\/\/\u5217\u8868\u521d\u59cb\u5316\nvector<string> v6(\u201chi\u201d);\/\/\u9519\u8bef\nvector<string> v7{10};\/\/\u7f16\u8bd1\u5668\u786e\u8ba4\u65e0\u6cd5\u6267\u884c\u5217\u8868\u521d\u59cb\u5316\uff0c\u5c1d\u8bd5\u7528\u9ed8\u8ba4\u503c\u521d\u59cb\u5316\uff0cv7\u670910\u4e2a\u9ed8\u8ba4\u521d\u59cb\u5316\u7684\u5143\u7d20\nvector<string> v8{10,\u201dhi\u201d}\/\/\u7f16\u8bd1\u5668\u786e\u8ba4\u65e0\u6cd5\u6267\u884c\u5217\u8868\u521d\u59cb\u5316\uff0c\u5c1d\u8bd5\u7528\u9ed8\u8ba4\u503c\u521d\u59cb\u5316\uff0cv8\u670910\u4e2a\u503c\u4e3a\u201chi\u201d\u7684\u5143\u7d20<\/code><\/pre>\n\n\n\n
vector\u7684\u4e00\u4e9b\u64cd\u4f5c<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001string\u5bf9\u8c61\u7684\u521d\u59cb\u5316 string s1 \/\/s1\u662f\u7a7a\u4e32string s2(s1) \/\/s2\u662fs1\u7684\u526f…Continue reading C++\u5b57\u7b26\u4e32\u3001\u5411\u91cf\u3001\u6570\u7ec4\uff08\u7b14\u8bb0\u4e00\uff09<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-335","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=335"}],"version-history":[{"count":7,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/335\/revisions"}],"predecessor-version":[{"id":521,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/335\/revisions\/521"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}