{"id":345,"date":"2020-03-22T14:48:44","date_gmt":"2020-03-22T06:48:44","guid":{"rendered":"https:\/\/www.notown.club\/?p=345"},"modified":"2020-08-22T16:21:24","modified_gmt":"2020-08-22T08:21:24","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%ba%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=345","title":{"rendered":"C++\u5b57\u7b26\u4e32\u3001\u5411\u91cf\u3001\u6570\u7ec4\uff08\u7b14\u8bb0\u4e8c\uff09"},"content":{"rendered":"\n

\u4e00\u3001\u8fed\u4ee3\u5668\u4ecb\u7ecd<\/strong><\/p>\n\n\n\n

\u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26\u53ef\u4ee5\u8bbf\u95eestring\u5bf9\u8c61\u7684\u5b57\u7b26\u6216vector\u5bf9\u8c61\u7684\u5143\u7d20\uff0c\u800c\u8fed\u4ee3\u5668\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u540c\u6837\u7684\u673a\u5236\uff0c\u800c\u4e14\u66f4\u52a0\u901a\u7528\uff0c\u6240\u6709\u6807\u51c6\u5e93\u5bb9\u5668\u90fd\u53ef\u4ee5\u4f7f\u7528\u8fed\u4ee3\u5668\uff0c\u4f46\u53ea\u6709\u4e00\u5c11\u90e8\u5206\u624d\u540c\u65f6\u652f\u6301\u4e0b\u6807\u8fd0\u7b97\u7b26\u3002\u6709\u6548\u7684\u8fed\u4ee3\u5668\u53ef\u4ee5\u6307\u5411\u67d0\u4e2a\u5143\u7d20\u6216\u8005\u6307\u5411\u5bb9\u5668\u4e2d\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u4e00\u4f4d\u7f6e\u3002<\/p>\n\n\n\n

\u4e8c\u3001\u8fed\u4ee3\u5668\u7684\u4f7f\u7528<\/strong><\/p>\n\n\n\n

vector v(10);
auto b= v.begin(),e=v.end();\/\/b\u8868\u793av\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0ce\u8868\u793av\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u4e00\u4f4d\u7f6e<\/code>
\u82e5\u5bb9\u5668\u4e3a\u7a7a\uff0c\u5219begin\u548cend\u8fd4\u56de\u540c\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u7ed3\u5408\u89e3\u5f15\u7528\u548c\u6210\u5458\u8bbf\u95ee\u64cd\u4f5c\u7684\u4e24\u79cd\u65b9\u6cd5
\u2460(*it).men \/\/\uff08\u8bb0\u5f97\u52a0\u62ec\u53f7\uff09
\u2461it->men
\u4f8b\uff1a <\/p>\n\n\n\n

vector v{\"asdas\",\"dd\",\"ff\",\"\"};\nauto it = v.begin();\nit += 3;\nif ((*it).empty())\/\/\u89e3\u5f15\u7528\u540e\u518d\u901a\u8fc7\u70b9\u8fd0\u7b97\u7b26\u8bbf\u95ee\u5176\u6210\u5458\u7684\u8bdd\uff0c\u89e3\u5f15\u7528\u90e8\u5206\u8981\u52a0()\n{\n     cout << \"\u7a7a\uff01\" << endl;<\/code>\n}     <\/code>\nif (it->empty())\n{\n     cout << \"\u7a7a\uff01\" << endl;\n}<\/code><\/pre>\n\n\n\n
\u4f46\u51e1\u4f7f\u7528\u4e86\u8fed\u4ee3\u5668\u7684\u5faa\u73af\u4f53\uff0c\u90fd\u4e0d\u8981\u5411\u8fed\u4ee3\u5668\u6240\u5c5e\u5bb9\u5668\u6dfb\u52a0\u5143\u7d20\uff08\u6dfb\u52a0\u5143\u7d20\u4f1a\u4f7f\u8fed\u4ee3\u5668\u5931\u6548\uff09<\/p>\n\n\n\n
\u4e09\u3001\u6570\u7ec4<\/strong><\/p>\n\n\n\n
int arr[10];               \/\/\u5b9a\u4e49\u4e00\u4e2a\u88c5\u670910\u4e2a\u6574\u6570\u7684\u6570\u7ec4\nint *ptrs[10];             \/\/ptrs\u662f\u4e00\u4e2a\u88c5\u670910\u4e2a\u6574\u578b\u6307\u9488\u7684\u6570\u7ec4\nint &refs[10]=\/*?*\/        \/\/\u9519\u8bef\uff0c\u5f15\u7528\u4e0d\u662f\u5bf9\u8c61 \nint (*parray)[10] =&arr;   \/\/\u5b9a\u4e49\u4e00\u4e2a\u6307\u9488\uff0c\u6307\u5411\u542b\u670910\u4e2a\u6574\u6570\u7684\u6570\u7ec4\nint (&arrRef)[10]= arr;    \/\/\u5b9a\u4e49\u4e00\u4e2a\u5f15\u7528\uff0c\u5f15\u7528\u4e00\u4e2a\u542b\u670910\u5341\u4e2a\u6574\u6570\u7684\u6570\u7ec4<\/code><\/pre>\n\n\n\n
\u4e0d\u5141\u8bb8\u6574\u4e2a\u6570\u7ec4\u7684\u62f7\u8d1d\u548c\u8d4b\u503c<\/strong><\/p>\n\n\n\n
auto ia[]={0,1,2,3,4,5,6,7,8,9};\/\/ia\u662f\u4e00\u4e2a\u542b\u670910\u4e2a\u6574\u6570\u7684\u6570\u7ec4
int a2=ia;\/\/\u9519\u8bef
auto ia2(ia);\/\/\u6b63\u786e\uff0c\u4f46ia2\u662f\u4e00\u4e2a\u6574\u578b\u6307\u9488\uff0c\u6307\u5411ia\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20
decltype (ia) ia3={0,1,2,3,4,5,6,7,8,9};\/\/ia3\u662f\u4e00\u4e2a\u542b\u670910\u4e2a\u6574\u6570\u7684\u6570\u7ec4<\/code><\/pre>\n\n\n\n
\u6307\u9488\u4e5f\u53ef\u4ee5\u50cf\u8fed\u4ee3\u5668\u4e00\u6837\u4f7f\u7528\uff1a<\/strong>
\u4e0d\u8fc7\u6570\u7ec4\u6bd5\u7adf\u4e0d\u662f\u7c7b\u7c7b\u578b\uff0c\u56e0\u6b64\u8fd9\u4e24\u4e2a\u51fd\u6570\u4e0d\u662f\u6210\u5458\u51fd\u6570\uff0c\u6b63\u786e\u7684\u4f7f\u7528\u5f62\u5f0f\u662f\u5c06\u6570\u7ec4\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570<\/p>\n\n\n\n
int ia[]={0,1,2,3,4,5,6,7,8,9};\/\/ia\u662f\u4e00\u4e2a\u542b\u670910\u4e2a\u6574\u6570\u7684\u6570\u7ec4
int *beg=begin(ia);\/\/\u6307\u5411ia\u9996\u5143\u7d20\u7684\u6307\u9488
int *end=end(ia);\/\/\u6307\u5411ia\u5c3e\u5143\u7d20\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e\u7684\u6307\u9488<\/code><\/pre>\n\n\n\n
\u56db\u3001C\u98ce\u683c\u5b57\u7b26\u4e32<\/strong><\/p>\n\n\n\n
\"\"
\uff08string\u7c7b\u578b\u4e0d\u9002\u7528\uff0cstring\u53ef\u4ee5\u6bd4\u5b83\u66f4\u65b9\u4fbf\u5730\u64cd\u4f5c\uff09<\/figcaption><\/figure>\n\n\n\n
\u4f20\u5165\u6b64\u7c7b\u51fd\u6570\u7684\u6307\u9488\u5fc5\u987b\u6307\u5411\u4ee5\u7a7a\u5b57\u7b26\u4f5c\u4e3a\u7ed3\u675f\u7684\u6570\u7ec4
\u4f8b\uff1a<\/p>\n\n\n\n
char ca[]={\u2018c\u2019,\u2019+\u2019,\u2019+\u2019};
cout << strlen(ca)<<endl;\/\/\u4e25\u91cd\u9519\u8bef\uff0cca\u6ca1\u6709\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u675f<\/code><\/pre>\n\n\n\n
\u6df7\u7528string\u5bf9\u8c61\u548cc\u98ce\u683c\u5b57\u7b26\u4e32\uff1a<\/strong>
1\u3001\u5141\u8bb8\u4f7f\u7528\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u675f\u7684\u5b57\u7b26\u6570\u7ec4\u6765\u521d\u59cb\u5316string\u5bf9\u8c61\u6216\u4e3astring\u5bf9\u8c61\u8d4b\u503c
2\u3001\u5728string\u52a0\u6cd5\u8fd0\u7b97\u4e2d\u5141\u8bb8\u4f7f\u7528\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u675f\u7684\u5b57\u7b26\u6570\u7ec4\u4f5c\u4e3a\u5176\u4e2d\u4e00\u4e2a\u8fd0\u7b97\u5bf9\u8c61
\u4f46\u4ee5\u4e0a\u6027\u8d28\u53cd\u8fc7\u6765\u5c31\u4e0d\u9002\u7528\u4e86
\u4e0d\u80fd\u76f4\u63a5\u7528string\u5bf9\u8c61\u76f4\u63a5\u521d\u59cb\u5316\u6307\u5411\u5b57\u7b26\u7684\u6307\u9488\uff0c\u9700\u8981\u501f\u52a9\u4e00\u4e2ac_str\u7684\u6210\u5458\u51fd\u6570<\/p>\n\n\n\n
\u4f8b\uff1a<\/p>\n\n\n\n
char c1[] = \"hello\";
string s1 = c1;\/\/\u5141\u8bb8\u4f7f\u7528\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u675f\u7684\u5b57\u7b26\u6570\u7ec4\u6765\u521d\u59cb\u5316string\u5bf9\u8c61\u6216\u4e3astring\u5bf9\u8c61\u8d4b\u503c
string s2 = s1 + c1;\/\/\u5728string\u52a0\u6cd5\u8fd0\u7b97\u4e2d\u5141\u8bb8\u4f7f\u7528\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u675f\u7684\u5b57\u7b26\u6570\u7ec4\u4f5c\u4e3a\u5176\u4e2d\u4e00\u4e2a\u8fd0\u7b97\u5bf9\u8c61
     \/\/\u4f46\u4ee5\u4e0a\u6027\u8d28\u53cd\u8fc7\u6765\u5c31\u4e0d\u9002\u7528\u4e86
char* str = s1;\/\/\u9519\u8bef\uff0c\u4e0d\u80fd\u7528string\u5bf9\u8c61\u521d\u59cb\u5316char*
const char* str1 = s1.c_str();\/\/\u6b63\u786e\uff0c\u4f46s1\u82e5\u88ab\u6539\u53d8\uff0c\u8fd9\u4e2a\u6307\u9488\u6307\u5411\u7684\u4e1c\u897f\u5c31\u6ca1\u7528\u4e86\uff0c\u6700\u540e\u91cd\u65b0\u62f7\u8d1d\u4e00\u4efd<\/code><\/pre>\n\n\n\n
\u7528\u6570\u7ec4\u521d\u59cb\u5316vector\u5bf9\u8c61\uff1a<\/strong>
\u4e0d\u5141\u8bb8\u7528\u6570\u7ec4\u4e3a\u53e6\u4e00\u4e2a\u6570\u7ec4\u8d4b\u503c\uff0c\u4e5f\u4e0d\u5141\u8bb8\u7528vector\u7ed9\u6570\u7ec4\u8d4b\u503c\uff0c\u4f46\u662f\u6709\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u7ec4\u8d4b\u7ed9vector\uff0c\u53ea\u9700\u8981\u6307\u660e\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740\u548c\u5c3e\u540e\u5730\u5740\u5373\u53ef
int int_arr[]={0,1,2,3,4,5};
vector ivec(begin(int_arr),end(int_arr));<\/code><\/p>\n\n\n\n
\u4f7f\u7528\u8303\u56f4for\u8bed\u53e5\u5904\u7406\u591a\u7ef4\u6570\u7ec4<\/strong>
\u5f53\u5904\u7406\u591a\u7ef4\u6570\u7ec4\u7684\u65f6\u5019\uff0c\u8981\u5c06\u5916\u5c42\u5faa\u73af\u7684\u63a7\u5236\u53d8\u91cf\u58f0\u660e\u6210\u5f15\u7528\u7c7b\u578b\uff0c\u8fd9\u662f\u4e3a\u4e86\u907f\u514d\u6570\u7ec4\u88ab\u81ea\u52a8\u8f6c\u6362\u6210\u6307\u9488\u3002
\u4f8b\uff1a<\/p>\n\n\n\n
    for (auto &row:arr)
        for(auto col:row)
                     cout<<col<<endl;<\/code><\/pre>\n\n\n\n
\u7279\u522b\u6ce8\u610f\uff1a<\/p>\n\n\n\n
int ia[3][4] = { 0 };
for (auto p = ia; p != ia+3; p++)\/\/p\u6307\u5411\u542b\u67094\u4e2a\u6574\u6570\u7684\u6570\u7ec4
 {
    for (auto q = *p; q != *p + 4; q++)\/\/q\u662f\u6307\u5411\u542b\u67094\u4e2a\u6574\u6570\u6570\u7ec4\u7684\u9996\u5143\u7d20\uff0c\u4e5f\u5c31\u662f\u8bf4q\u6307\u5411\u4e00\u4e2a\u6574\u6570
    {
        cout << *q << \" \";
    }
     cout << endl; 
}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001\u8fed\u4ee3\u5668\u4ecb\u7ecd \u4f7f\u7528\u4e0b\u6807\u8fd0\u7b97\u7b26\u53ef\u4ee5\u8bbf\u95eestring\u5bf9\u8c61\u7684\u5b57\u7b26\u6216vector\u5bf9\u8c61\u7684\u5143\u7d20\uff0c\u800c\u8fed\u4ee3\u5668\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u540c\u6837\u7684…Continue reading C++\u5b57\u7b26\u4e32\u3001\u5411\u91cf\u3001\u6570\u7ec4\uff08\u7b14\u8bb0\u4e8c\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-345","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/345","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=345"}],"version-history":[{"count":13,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions"}],"predecessor-version":[{"id":525,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/345\/revisions\/525"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}