{"id":67375,"date":"2026-01-28T17:18:07","date_gmt":"2026-01-28T09:18:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/67375.html"},"modified":"2026-01-28T17:18:07","modified_gmt":"2026-01-28T09:18:07","slug":"c-%e7%b1%bb%e5%92%8c%e5%af%b9%e8%b1%a1%ef%bc%88%e4%ba%94%ef%bc%89%ef%bc%9a%e5%88%9d%e5%a7%8b%e5%8c%96%e5%88%97%e8%a1%a8%e3%80%81static%e3%80%81%e5%8f%8b%e5%85%83%e3%80%81%e5%86%85%e9%83%a8%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/67375.html","title":{"rendered":"C++ \u7c7b\u548c\u5bf9\u8c61\uff08\u4e94\uff09\uff1a\u521d\u59cb\u5316\u5217\u8868\u3001static\u3001\u53cb\u5143\u3001\u5185\u90e8\u7c7b\u7b497\u5927\u77e5\u8bc6\u70b9\u5168\u653b\u7565"},"content":{"rendered":"

\"\"<\/p>\n

\"\"<\/p>\n

🔥\u4e2a\u4eba\u4e3b\u9875：\u5c0f\u5f20\u540c\u5b66<\/p>\n

🎬\u4f5c\u8005\u7b80\u4ecb：C++\u7814\u53d1\u65b9\u5411\u5b66\u4e60\u8005<\/p>\n

📖\u4e2a\u4eba\u4e13\u680f：\u00a0\u300aC\u8bed\u8a00\u300b\u300a\u6570\u636e\u7ed3\u6784\u300b\u300aC++\u6df1\u5ea6\u5256\u6790：\u4ece\u5165\u95e8\u5230\u6df1\u8015\u300b<\/p>\n

\u2b50\ufe0f\u4eba\u751f\u683c\u8a00：\u65e0\u89c6\u4e2d\u65ad，\u4e0d\u5f03\u70ed\u6795，\u65b9\u5f97\u575a\u6301\u4e4b\u9053\u3002<\/p>\n

\"\"<\/p>\n

\n

\u524d\u8a00：<\/p>\n

\u524d\u9762\u6211\u4eec\u5b66\u4e60\u5b8c\u4e866\u79cd\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u4ee5\u53caDate\u7c7b\u7684\u5b9e\u73b0\u3002\u4eca\u5929\u8fd9\u7bc7\u535a\u5ba2\u662f\u7c7b\u548c\u5bf9\u8c61\u7684\u6700\u540e\u4e00\u4e9b\u77e5\u8bc6，\u4e3b\u8981\u4f1a\u6d89\u53ca\u521d\u59cb\u5316\u5217\u8868\u3001\u7c7b\u578b\u8f6c\u6362\u3001static\u6210\u5458\u51fd\u6570，\u53cb\u5143\u3001\u533f\u540d\u5bf9\u8c61\u3001\u7f16\u8bd1\u5668\u7684\u4e00\u4e9b\u4f18\u5316\u3002\u901a\u8fc7\u672c\u7bc7\u535a\u6587\u548c\u4e4b\u524d\u7684\u535a\u6587，\u7c7b\u548c\u5bf9\u8c61\u5c31\u5b8c\u7ed3\u6492\u82b1\u4e86\u3002\u90a3\u6211\u4eec\u5c31\u8fdb\u5165\u5230\u7c7b\u548c\u5bf9\u8c61\u7684\u6536\u5b98\u4e4b\u6218\u5427~<\/p>\n

\n

\u76ee\u5f55<\/p>\n

\u4e00\u3001\u518d\u63a2\u6784\u9020\u51fd\u6570<\/p>\n

1.\u6784\u9020\u51fd\u6570\u4f53\u5185\u8d4b\u503c：<\/p>\n

2.\u521d\u59cb\u5316\u5217\u8868（\u91cd\u70b9）：<\/p>\n

3.\u521d\u59cb\u5316\u5217\u8868\u5c0f\u7ec3\u4e60：<\/p>\n

\u4e8c\u3001\u7c7b\u578b\u8f6c\u6362<\/p>\n

\u4e09\u3001static\u6210\u5458<\/p>\n

1.\u7ec3\u4e60\u98981：<\/p>\n

2.\u7ec3\u4e60\u98982：<\/p>\n

\u56db\u3001\u53cb\u5143<\/p>\n

1.\u53cb\u5143\u51fd\u6570：<\/p>\n

2.\u53cb\u5143\u7c7b：<\/p>\n

\u4e94\u3001\u5185\u90e8\u7c7b<\/p>\n

\u516d\u3001\u533f\u540d\u5bf9\u8c61<\/p>\n

\u4e03\u3001\u5bf9\u8c61\u62f7\u8d1d\u65f6\u7684\u7f16\u8bd1\u5668\u4f18\u5316<\/p>\n

\n

\u4e00\u3001\u518d\u63a2\u6784\u9020\u51fd\u6570<\/h2>\n

1.\u6784\u9020\u51fd\u6570\u4f53\u5185\u8d4b\u503c：<\/h3>\n

\u4e4b\u524d\u6211\u4eec\u5728\u521b\u5efa\u5bf9\u8c61\u65f6，\u7f16\u8bd1\u5668\u901a\u8fc7\u8c03\u7528\u6211\u4eec\u5b9a\u4e49\u7684\u6784\u9020\u51fd\u6570，\u7ed9\u5bf9\u8c61\u4e2d\u5404\u4e2a\u6210\u5458\u53d8\u91cf\u8d4b\u4e88\u4e00\u4e2a\u5408\u9002\u7684\u521d\u59cb\u503c\u3002<\/p>\n

class Date
\n{
\npublic:
\n\/\/ \u6784\u9020\u51fd\u6570
\nDate(int year = 0, int month = 1, int day = 1)
\n{
\n\/\/\u5b9e\u9645\u4e0a\u662f\u8d4b\u503c，\u5e76\u975e\u4e25\u683c\u610f\u4e49\u4e0a\u7684\u521d\u59cb\u5316
\n_year = year;
\n_month = month;
\n_day = day;
\n}
\nprivate:
\nint _year;
\nint _month;
\nint _day;
\n}; <\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f：\u00a0\u867d\u7136\u901a\u8fc7\u8c03\u7528\u4e0a\u8ff0\u7684\u6784\u9020\u51fd\u6570\u540e，\u5bf9\u8c61\u4e2d\u7684\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u90fd\u6709\u4e86\u4e00\u4e2a\u521d\u59cb\u503c，\u4f46\u662f\u6784\u9020\u51fd\u6570\u4e2d\u7684\u8bed\u53e5\u53ea\u80fd\u5c06\u5176\u79f0\u4f5c\u4e3a\u8d4b\u521d\u503c，\u800c\u4e0d\u80fd\u79f0\u4f5c\u4e3a\u521d\u59cb\u5316\u3002\u56e0\u4e3a\u521d\u59cb\u5316\u53ea\u80fd\u521d\u59cb\u5316\u4e00\u6b21，\u800c\u6784\u9020\u51fd\u6570\u4f53\u5185\u53ef\u4ee5\u8fdb\u884c\u591a\u6b21\u8d4b\u503c\u3002<\/p>\n

class Date
\n{
\npublic:
\n\/\/ \u6784\u9020\u51fd\u6570
\nDate(int year = 0, int month = 1, int day = 1)
\n{
\n_year = year;\/\/ \u7b2c\u4e00\u6b21\u8d4b\u503c
\n_year = 2022;\/\/ \u7b2c\u4e8c\u6b21\u8d4b\u503c
\n\/\/…
\n_month = month;
\n_day = day;
\n}
\nprivate:
\nint _year;
\nint _month;
\nint _day;
\n};<\/p>\n

2.\u521d\u59cb\u5316\u5217\u8868（\u91cd\u70b9）：<\/h3>\n

\u2022 <\/span>\u4e4b\u524d\u6211\u4eec\u5b9e\u73b0\u6784\u9020\u51fd\u6570\u65f6，\u521d\u59cb\u5316\u6210\u5458\u53d8\u91cf\u4e3b\u8981\u4f7f\u7528\u51fd\u6570\u4f53\u5185\u8d4b\u503c，\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u8fd8\u6709\u4e00\u79cd\u65b9\u5f0f，\u5c31\u662f\u521d\u59cb\u5316\u5217\u8868，\u521d\u59cb\u5316\u5217\u8868\u7684\u4f7f\u7528\u65b9\u5f0f\u662f\u4ee5\u4e00\u4e2a\u5192\u53f7\u5f00\u59cb，\u63a5\u7740\u662f\u4e00\u4e2a\u4ee5\u9017\u53f7\u5206\u9694\u7684\u6570\u636e\u6210\u5458\u5217\u8868，\u6bcf\u4e2a"\u6210\u5458\u53d8\u91cf"\u540e\u9762\u8ddf\u4e00\u4e2a\u653e\u5728\u62ec\u53f7\u4e2d\u7684\u521d\u59cb\u503c\u6216\u8868\u8fbe\u5f0f\u3002 <\/span><\/p>\n

\u2022 <\/span>\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u5728\u521d\u59cb\u5316\u5217\u8868\u4e2d\u53ea\u80fd\u51fa\u73b0\u4e00\u6b21，\u8bed\u6cd5\u7406\u89e3\u4e0a\u521d\u59cb\u5316\u5217\u8868\u53ef\u4ee5\u8ba4\u4e3a\u662f\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u5b9a\u4e49\u521d\u59cb\u5316\u7684\u5730\u65b9\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5f15\u7528\u6210\u5458\u53d8\u91cf，const\u6210\u5458\u53d8\u91cf，\u6ca1\u6709\u9ed8\u8ba4\u6784\u9020\u7684\u7c7b\u7c7b\u578b\u53d8\u91cf，\u5fc5\u987b\u653e\u5728\u521d\u59cb\u5316\u5217\u8868\u4f4d\u7f6e\u8fdb\u884c\u521d\u59cb\u5316，\u5426\u5219\u4f1a\u7f16\u8bd1\u62a5\u9519\u3002 <\/span><\/p>\n

\u2022 <\/span>C++11\u652f\u6301\u5728\u6210\u5458\u53d8\u91cf\u58f0\u660e\u7684\u4f4d\u7f6e\u7ed9\u7f3a\u7701\u503c，\u8fd9\u4e2a\u7f3a\u7701\u503c\u4e3b\u8981\u662f\u7ed9\u6ca1\u6709\u663e\u793a\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316\u7684\u6210\u5458\u4f7f\u7528\u7684\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5c3d\u91cf\u4f7f\u7528\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316，\u56e0\u4e3a\u90a3\u4e9b\u4f60\u4e0d\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316\u7684\u6210\u5458\u4e5f\u4f1a\u8d70\u521d\u59cb\u5316\u5217\u8868，\u5982\u679c\u8fd9\u4e2a\u6210\u5458\u5728\u58f0\u660e\u4f4d\u7f6e\u7ed9\u4e86\u7f3a\u7701\u503c，\u521d\u59cb\u5316\u5217\u8868\u4f1a\u7528\u8fd9\u4e2a\u7f3a\u7701\u503c\u521d\u59cb\u5316\u3002\u5982\u679c\u4f60\u6ca1\u6709\u7ed9\u7f3a\u7701\u503c，\u5bf9\u4e8e\u6ca1\u6709\u663e\u793a\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316\u7684\u5185\u7f6e\u7c7b\u578b\u6210\u5458\u662f\u5426\u521d\u59cb\u5316\u53d6\u51b3\u4e8e\u7f16\u8bd1\u5668，C++\u5e76\u6ca1\u6709\u89c4\u5b9a\u3002\u5bf9\u4e8e\u6ca1\u6709\u663e\u793a\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316\u7684\u81ea\u5b9a\u4e49\u7c7b\u578b\u6210\u5458\u4f1a\u8c03\u7528\u8fd9\u4e2a\u6210\u5458\u7c7b\u578b\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570，\u5982\u679c\u6ca1\u6709\u9ed8\u8ba4\u6784\u9020\u4f1a\u7f16\u8bd1\u9519\u8bef\u3002 <\/span><\/p>\n

\u2022 <\/span>\u521d\u59cb\u5316\u5217\u8868\u4e2d\u6309\u7167\u6210\u5458\u53d8\u91cf\u5728\u7c7b\u4e2d\u58f0\u660e\u987a\u5e8f\u8fdb\u884c\u521d\u59cb\u5316，\u8ddf\u6210\u5458\u5728\u521d\u59cb\u5316\u5217\u8868\u51fa\u73b0\u7684\u7684\u5148\u540e\u987a\u5e8f\u65e0\u5173\u3002\u5efa\u8bae\u58f0\u660e\u987a\u5e8f\u548c\u521d\u59cb\u5316\u5217\u8868\u987a\u5e8f\u4fdd\u6301\u4e00\u81f4\u3002<\/span><\/p>\n

\u4e0b\u9762\u6211\u4eec\u7528\u4ee3\u7801\u6765\u8bf4\u660e\u6bcf\u4e2a\u7279\u70b9：<\/p>\n

\u57fa\u7840\u7528\u6cd5：<\/p>\n

class Date
\n{
\npublic:
\n\/\/ \u6784\u9020\u51fd\u6570
\nDate(int year = 1, int month = 1, int day = 1)
\n:_year(year)
\n, _month(month)
\n, _day(day)
\n{
\n \/\/…
\n }
\nprivate:
\nint _year;
\nint _month;
\nint _day;
\n};<\/p>\n

\u5fc5\u987b\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316\u7684\u60c5\u51b5：<\/p>\n

#include<iostream>
\nusing namespace std;<\/p>\n

class Time
\n{
\npublic:
\nTime(int hour)
\n:_hour(hour)
\n{
\ncout << "Time()" << endl;
\n}
\nprivate:
\nint _hour;
\n};<\/p>\n

class Date
\n{
\npublic:
\nDate(int& ref, int year = 1, int month = 1, int day = 1)
\n:_year(year)
\n,_month(month)
\n,_day(day)
\n,_t(12)
\n,_ref(ref)
\n,_n(1)
\n{
\n\/\/ error C2512: \u201cTime\u201d: \u6ca1\u6709\u5408\u9002\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u53ef\u7528
\n\/\/ error C2530 : \u201cDate::_ref\u201d : \u5fc5\u987b\u521d\u59cb\u5316\u5f15\u7528
\n\/\/ error C2789 : \u201cDate::_n\u201d : \u5fc5\u987b\u521d\u59cb\u5316\u5e38\u91cf\u9650\u5b9a\u7c7b\u578b\u7684\u5bf9\u8c61
\n}
\nvoid Print() const
\n{
\ncout << _year << "-" << _month << "-" << _day << endl;
\n}
\nprivate:
\nint _year;
\nint _month;
\nint _day;<\/p>\n

\/\/\u4ee5\u4e0b\u8fd9\u4e09\u4e2a\u5c31\u662f\u5fc5\u987b\u8981\u5728\u521d\u59cb\u5316\u5217\u8868\u4e2d\u521d\u59cb\u5316\u7684
\n\/\/\u5fc5\u987b\u521d\u59cb\u5316\u7684\u90fd\u9700\u8981\u5728\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316，\u8981\u4e48\u5c31\u7ed9\u7f3a\u7701\u503c
\n\/\/\u4e0d\u7ed9\u5c31\u4f1a\u62a5\u4e0a\u9762\u7684\u90a3\u4e9b\u9519\u8bef<\/p>\n

Time _t; \/\/ \u6ca1\u6709\u9ed8\u8ba4\u6784\u9020
\nint& _ref; \/\/ \u5f15\u7528
\nconst int _n; \/\/ const<\/p>\n

};<\/p>\n

int main()
\n{
\nint a = 0;
\nDate d1(a);
\nd1.Print();
\nreturn 0;
\n} <\/p>\n

\u7528\u521d\u59cb\u5316\u5217\u8868\u89e3\u51b3\u81ea\u5b9a\u4e49\u7c7b\u578b（\u5982<\/span>MyQueue\u7c7b）\u7684\u4e00\u4e9b\u95ee\u9898：<\/span><\/p>\n

\/\/\u901a\u8fc7\u4e0a\u9762\u7684\u521d\u59cb\u5316\u5217\u8868，\u6211\u4eec\u4e4b\u524dMyQueue\u7c7b\u7684\u4e00\u4e9b\u95ee\u9898\u4e5f\u53ef\u4ee5\u5f97\u5230\u89e3\u51b3
\n\/\/\u8fd9\u91cc\u5c31\u5927\u6982\u5b9e\u73b0\u4e00\u90e8\u5206，\u4ec5\u4f5c\u4e3a\u6f14\u793a\u4f7f\u7528
\n#include<iostream>
\nusing namespace std;
\nclass Stack
\n{
\npublic:
\nStack(int n)\/\/\u8fd9\u91cc\u7ed9\u7684\u4e0d\u662f\u9ed8\u8ba4\u6784\u9020
\n{
\ncout << "Stack(int n)" << '\\\\n';
\n}
\n};<\/p>\n

class MyQueue
\n{
\npublic:
\n\/\/\u5f53\u4e0d\u5199MyQueue\u7684\u6784\u9020\u51fd\u6570\u65f6，\u4f1a\u81ea\u52a8\u8c03\u7528Stack\u7684\u6784\u9020\u6765\u521d\u59cb\u5316
\n\/\/\u4f46\u662f\u5982\u679cStack\u6ca1\u6709\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u600e\u4e48\u529e？
\n\/\/\u5982\u679c\u4ecd\u7136\u8c03\u7528MyQueue\u9ed8\u8ba4\u7684\u6784\u9020\u51fd\u6570\u4f1a\u62a5\u9519
\n\/\/MyQueue(int n = 4)
\n\/\/{
\n\/\/_st1 = n;
\n\/\/ _st2 = n;
\n\/\/\/\/\u8fd9\u91cc\u5982\u679c\u76f4\u63a5\u8fd9\u6837\u5199\u662f\u9519\u8bef\u7684，\u65e0\u6cd5\u8fdb\u884c\u8d4b\u503c
\n\/\/}<\/p>\n

\/\/\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u521d\u59cb\u5316\u5217\u8868\u6709\u6548\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898
\nMyQueue(int n = 4)
\n:_st1(n)
\n,_st2(n)\/\/\u8fd9\u91cc\u5c31\u4e0d\u662f\u8d4b\u503c\u4e86，\u662f\u521d\u59cb\u5316，\u5c31\u53ef\u4ee5\u8fdb\u5165\u5230\u81ea\u5b9a\u4e49\u7684\u6784\u9020\u51fd\u6570
\n{
\n\/\/…
\n}
\nprivate:
\nStack _st1;
\nStack _st2;
\n};
\nint main()
\n{
\nMyQueue q1;<\/p>\n

return 0;
\n} <\/p>\n

\u5728\u6210\u5458\u53d8\u91cf\u58f0\u660e\u65f6\u5229\u7528\u7f3a\u7701\u503c\u8fdb\u884c\u521d\u59cb\u5316：<\/p>\n

\/\/\u5176\u5b9e\u9664\u4e86\u521d\u59cb\u5316\u5217\u8868\u4ee5\u5916，\u6211\u4eec\u8fd8\u53ef\u4ee5\u8fd9\u6837\u73a9
\n#include<iostream>
\nusing namespace std;<\/p>\n

class Time
\n{
\npublic:
\nTime(int hour)
\n:_hour(hour)
\n{
\ncout << "Time()" << endl;
\n}
\nprivate:
\nint _hour;
\n};
\nclass Date
\n{
\npublic:
\nDate()
\n:_year(100)
\n{<\/p>\n

}
\nvoid Print() const
\n{
\ncout << _year << "-" << _month << "-" << _day << endl;
\n}
\nprivate:
\n\/\/\u6ce8\u610f:\u8fd9\u91cc\u4e0d\u662f\u521d\u59cb\u5316，\u800c\u662f\u7ed9\u7684\u7f3a\u7701\u503c，\u8fd9\u4e2a\u7f3a\u7701\u503c\u662f\u7ed9\u521d\u59cb\u5316\u5217\u8868\u7684
\n\/\/\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u90fd\u4f1a\u8d70\u521d\u59cb\u5316\u5217\u8868，\u5982\u679c\u672a\u663e\u793a\u5728\u521d\u59cb\u5316\u5217\u8868，\u5219\u4f1a\u6309\u7f3a\u7701\u503c\u521d\u59cb\u5316
\n\/\/\u5982\u679c\u90fd\u6ca1\u6709，\u90a3\u5185\u7f6e\u7c7b\u578b\u53ef\u80fd\u5c31\u662f\u968f\u673a\u503c，\u4e4b\u524d\u63d0\u5230\u8fc7\u7684\u90a3\u4e09\u79cd\u5c31\u662f\u76f4\u63a5\u62a5\u9519
\nint _year = 1;
\nint _month = 1;
\nint _day=1;<\/p>\n

Time _t = 1;\/\/ \u6ca1\u6709\u9ed8\u8ba4\u6784\u9020
\nconst int _n = 1; \/\/ const
\nint* _ptr = (int*)malloc(40);\/\/\u6570\u7ec4\u4e5f\u53ef\u4ee5
\n};<\/p>\n

int main()
\n{
\nDate d1;
\nd1.Print();<\/p>\n

return 0;
\n} <\/p>\n

\u90a3\u4e48\u90fd\u6709\u521d\u59cb\u5316\u5217\u8868\u4e86，\u4e3a\u4ec0\u4e48\u8fd8\u7559\u7740\u51fd\u6570\u4f53\u5185\u90a3\u4e00\u90e8\u5206\u5462？<\/span><\/p>\n

\u603b\u7ed3\u5c31\u662f\u5728\u51fd\u6570\u4f53\u5185\u8fd8\u8981\u8fdb\u884c\u68c0\u67e5\u3001\u4ee5\u53ca\u5c06\u7a7a\u95f4\u521d\u59cb\u5316\u989d\u64cd\u4f5c\u7b49，\u89c1\u5982\u4e0b\u4ee3\u7801<\/span><\/p>\n

\/\/\u90a3\u4e3a\u4ec0\u4e48\u90fd\u4f7f\u7528\u4e86\u521d\u59cb\u5316\u5217\u8868\u4e86，\u8fd8\u9700\u8981\u90a3\u4e2a\u62ec\u53f7\u5462
\n\/\/\u6211\u4eec\u6765\u770b\u770b\u4e0b\u9762\u8fd9\u4e2a\u573a\u666f
\n#include<iostream>
\nusing namespace std;
\nclass A
\n{
\npublic:
\nA(int n = 10)
\n:_a((int*)malloc(sizeof(int)* n))
\n, _size(0)
\n{
\n\/\/\u4e0a\u9762\u7684_a\u7684\u7a7a\u95f4\u662f\u5426\u5f00\u8f9f\u6210\u529f\u662f\u4e0d\u662f\u9700\u8981\u5728\u8fd9\u91cc\u68c0\u67e5
\n\/\/\u4ee5\u53ca\u7ed9\u7a7a\u95f4\u521d\u59cb\u5316\u662f\u4e0d\u662f\u4e5f\u5f97\u5728\u8fd9\u91cc\u5b9e\u73b0
\nif (_a == nullptr)
\n{
\nperror("malloc fail!");
\nexit(1);
\n}
\nmemset(_a, 0, sizeof(int) * n);
\n}
\nprivate:
\nint* _a;
\nint _size;
\n};
\nint main()
\n{
\nA aa;<\/p>\n

return 0;
\n} <\/p>\n

\u521d\u59cb\u5316\u5217\u8868\u603b\u7ed3： <\/span><\/p>\n

\u2022 <\/span>\u65e0\u8bba\u662f\u5426\u663e\u793a\u5199\u521d\u59cb\u5316\u5217\u8868，\u6bcf\u4e2a\u6784\u9020\u51fd\u6570\u90fd\u6709\u521d\u59cb\u5316\u5217\u8868； <\/span><\/p>\n

\u2022 <\/span>\u65e0\u8bba\u662f\u5426\u5728\u521d\u59cb\u5316\u5217\u8868\u663e\u793a\u521d\u59cb\u5316\u6210\u5458\u53d8\u91cf，\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u90fd\u8981\u8d70\u521d\u59cb\u5316\u5217\u8868\u521d\u59cb\u5316；<\/span><\/p>\n

\"\"<\/p>\n

3.\u521d\u59cb\u5316\u5217\u8868\u5c0f\u7ec3\u4e60：<\/h3>\n

\u4e0b\u9762\u7a0b\u5e8f\u7684\u8fd0\u884c\u7ed3\u679c\u662f\u4ec0\u4e48（） <\/span><\/p>\n

A. \u8f93\u51fa 1 1 <\/span><\/p>\n

B. \u8f93\u51fa 2 2 <\/span><\/p>\n

C. \u7f16\u8bd1\u62a5\u9519 <\/span><\/p>\n

D. \u8f93\u51fa 1 \u968f\u673a\u503c <\/span><\/p>\n

E. \u8f93\u51fa 1 2 <\/span><\/p>\n

F. \u8f93\u51fa 2 1<\/span><\/p>\n

\"\"<\/p>\n

\u7b54\u6848：D<\/span><\/p>\n

\u89e3\u6790：<\/span>\u521d\u59cb\u5316\u5217\u8868\u4e2d\u6309\u7167\u6210\u5458\u53d8\u91cf\u5728\u7c7b\u4e2d\u58f0\u660e\u987a\u5e8f\u8fdb\u884c\u521d\u59cb\u5316，\u8ddf\u6210\u5458\u5728\u521d\u59cb\u5316\u5217\u8868\u51fa\u73b0\u7684\u7684\u5148\u540e\u987a\u5e8f\u65e0\u5173\u3002\u5efa\u8bae\u58f0\u660e\u987a\u5e8f\u548c\u521d\u59cb\u5316\u5217\u8868\u987a\u5e8f\u4fdd\u6301\u4e00\u81f4，\u4ee5\u514d\u7c7b\u4f3c\u9519\u8bef\u3002<\/span><\/p>\n

\/\/\u6211\u4eec\u6700\u540e\u518d\u6765\u770b\u4e2a\u9898
\n\/\/\u6ce8\u610f_a1,_a2\u8c01\u5148\u521d\u59cb\u5316，\u4ee5\u53ca\u6700\u540e\u7ed3\u679c\u662f\u4ec0\u4e48
\n#include<iostream>
\nusing namespace std;
\nclass A
\n{
\n\/\/\u521d\u59cb\u5316\u987a\u5e8f\u8ddf\u51fa\u73b0\u5728\u521d\u59cb\u5316\u5217\u8868\u7684\u987a\u5e8f\u65e0\u5173，\u53d6\u51b3\u4e8e\u58f0\u660e\u7684\u987a\u5e8f
\n \/\/\u6240\u4ee5\u8fd9\u91cc\u5176\u5b9e\u662f_a2\u5148\u521d\u59cb\u5316，_a1\u518d\u521d\u59cb\u5316
\npublic:
\nA(int a)
\n:_a1(a)
\n,_a2(_a1)
\n{
\n\/\/_a2\u5148\u521d\u59cb\u5316，\u6b64\u65f6_a1\u8fd8\u6ca1\u521d\u59cb\u5316，\u6240\u4ee5\u662f\u968f\u673a\u503c，\u6700\u540e_a2\u4e5f\u5c31\u662f\u968f\u673a\u503c\u4e86
\n\/\/_a1\u518d\u521d\u59cb\u5316,\u7f3a\u7701\u503c\u548c\u521d\u59cb\u5316\u5217\u8868\u663e\u793a\u51fa\u73b0\u7b26\u5408，\u6309\u521d\u59cb\u5316\u5217\u8868\u7684\u6765，\u4e5f\u5c31\u662f1\u3002
\n}
\nvoid Print()
\n {
\ncout << _a1 << " " << _a2 << endl;
\n}
\nprivate:
\n\/\/\u521d\u59cb\u5316\u5217\u8868\u6309\u7167\u6210\u5458\u53d8\u91cf\u5728\u7c7b\u4e2d\u7684\u58f0\u660e\u987a\u5e8f\u521d\u59cb\u5316
\n\/\/\u8fd9\u91cc\u6211\u4eec\u53d1\u73b0_a2\u5148\u58f0\u660e
\nint _a2 = 2;
\nint _a1 = 2;
\n};
\nint main()
\n{
\nA aa(1);
\naa.Print();\/\/1 \u968f\u673a\u503c
\n} <\/p>\n

\n

\u4e8c\u3001\u7c7b\u578b\u8f6c\u6362<\/h2>\n

\u6211\u4eec\u4e4b\u524d\u63a5\u89e6\u8fc7\u5185\u7f6e\u7c7b\u578b\u548c\u5185\u7f6e\u7c7b\u578b\u4e4b\u524d\u7684\u8f6c\u6362（\u6709\u9690\u5f0f\u8f6c\u6362\u3001\u663e\u793a\u8f6c\u6362），\u90a3\u4e48\u6211\u4eec\u73b0\u5728\u518d\u6765\u770b\u770b\u5185\u7f6e\u7c7b\u578b\u548c\u7c7b\u7c7b\u578b，\u7c7b\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362：<\/p>\n

\u2022 <\/span>C++\u652f\u6301\u5185\u7f6e\u7c7b\u578b\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u4e3a\u7c7b\u7c7b\u578b\u5bf9\u8c61，\u9700\u8981\u6709\u76f8\u5173\u5185\u7f6e\u7c7b\u578b\u4e3a\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002 <\/span><\/p>\n

\u2022 <\/span>\u6784\u9020\u51fd\u6570\u524d\u9762\u52a0explicit\u5c31\u4e0d\u518d\u652f\u6301\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u3002 <\/span><\/p>\n

\u2022 <\/span>\u7c7b\u7c7b\u578b\u7684\u5bf9\u8c61\u4e4b\u95f4\u4e5f\u53ef\u4ee5\u9690\u5f0f\u8f6c\u6362，\u9700\u8981\u76f8\u5e94\u7684\u6784\u9020\u51fd\u6570\u652f\u6301\u3002<\/span><\/p>\n

\"\"<\/p>\n

\u4e0b\u9762\u6211\u4eec\u4f9d\u7136\u7528\u4ee3\u7801\u6765\u8fdb\u4e00\u6b65\u8bf4\u660e\u6bcf\u4e2a\u7279\u70b9：<\/p>\n

\u57fa\u672c\u4f7f\u7528：<\/p>\n

#include<iostream>
\nusing namespace std;
\nclass A
\n{
\npublic:
\n\/\/\u6784\u9020\u51fd\u6570explicit\u5c31\u4e0d\u518d\u652f\u6301\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u4e86
\n\/\/explict A(int a1)
\n\/\/\u8fd9\u91cc\u7684\u6784\u9020\u51fd\u6570\u53c2\u6570\u6709\u76f8\u5173\u5185\u7f6e\u7c7b\u578b
\nA(int a1)
\n:_a1(a1)
\n{
\n}
\nprivate:
\nint _a1 = 1;
\nint _a2 = 2;
\n};<\/p>\n

void func(const A& aa = 1)
\n{<\/p>\n

}<\/p>\n

class Stack
\n{
\npublic:
\nvoid Push(const A& a)
\n{<\/p>\n

}<\/p>\n

};<\/p>\n

int main()
\n{
\n\/\/1.\u5185\u7f6e\u7c7b\u578b\u4e4b\u95f4\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362
\nint i = 1;
\ndouble j = i;\/\/\u5176\u5b9e\u4e2d\u95f4\u6709\u4e2a\u4e34\u65f6\u5bf9\u8c61<\/p>\n

const double& ref1 = i;\/\/\u8fd9\u4e2a\u6211\u4eec\u4e4b\u524d\u4e5f\u8bb2\u8fc7，\u4e2d\u95f4\u7684\u4e34\u65f6\u5bf9\u8c61\u5177\u6709\u5e38\u6027<\/p>\n

\/\/2.\u5185\u7f6e\u7c7b\u578b\u548c\u7c7b\u7c7b\u578b\u4e4b\u95f4\u7684\u9690\u5f0f\u8f6c\u6362
\n\/\/\u9700\u8981\u6709\u76f8\u5173\u5185\u7f6e\u7c7b\u578b\u4e3a\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570<\/p>\n

\/\/\u8fd9\u6837\u5199\u662f\u76f4\u63a5\u6784\u9020
\nA a1(1);
\n\/\/\u8fd9\u6837\u5199\u662f\u62f7\u8d1d\u6784\u9020
\nA a2 = a1;
\n\/\/\u8fd9\u4e2a\u624d\u6d89\u53ca\u5230\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362
\nA a2 = 1;\/\/\u5148\u6784\u9020\u4e34\u65f6\u5bf9\u8c61，\u518d\u5c06\u4e34\u65f6\u5bf9\u8c61\u62f7\u8d1d\u7ed9a2<\/p>\n

const A& ref2 = a1;
\nconst A& ref3 = 1;\/\/\u540c\u7406<\/p>\n

\/\/\u4e09\u79cd\u90fd\u53ef\u4ee5，\u56e0\u4e3a\u4e0a\u9762\u7684\u51fd\u6570\u53c2\u6570\u662f\u7528\u8fc7const\u4fee\u9970\u7684(\u6240\u4ee5\u7b2c\u4e8c\u79cd\u4e5fok)
\nfunc(a1);
\nfunc(1);
\nfunc();<\/p>\n

\/\/\u6211\u4eec\u518d\u6765\u770b\u770b\u522b\u7684\u4f7f\u7528\u573a\u666f
\nStack s1;
\n\/\/\u8fd9\u6837\u5199\u6709\u70b9\u9ebb\u70e6\u4e86
\nA a3(3);
\ns1.Push(a3);<\/p>\n

\/\/\u5c31\u53ef\u4ee5\u76f4\u63a5\u8fd9\u6837\u5199
\ns1.Push(3);<\/p>\n

return 0;
\n} <\/p>\n

\"\"<\/p>\n

\u591a\u53c2\u6570\u8f6c\u5316\u4ee5\u53ca\u7c7b\u548c\u7c7b\u4e4b\u95f4\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362：<\/p>\n

\/\/\u518d\u6765\u770b\u770b\u591a\u53c2\u6570\u8f6c\u5316\u4ee5\u53ca\u7c7b\u548c\u7c7b\u4e4b\u95f4\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362
\n#include<iostream>
\nusing namespace std;<\/p>\n

class A
\n{
\npublic:
\n\/\/ \u6784\u9020\u51fd\u6570explicit\u5c31\u4e0d\u518d\u652f\u6301\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362
\n\/\/ explicit A(int a1)
\nA(int a1)
\n:_a1(a1)
\n{
\ncout << "A(int a1)" << '\\\\n';
\n}<\/p>\n

A(const A& aa)
\n{
\ncout << "A(const A& aa)" << '\\\\n';
\n}<\/p>\n

A(int a1, int a2)
\n:_a1(a1)
\n, _a2(a2)
\n{
\n}<\/p>\n

int Get() const
\n{
\nreturn _a1 + _a2;
\n}<\/p>\n

private:
\nint _a1 = 1;
\nint _a2 = 2;
\n};<\/p>\n

class B
\n{
\npublic:
\n\/\/\u7c7b\u548c\u7c7b\u4e4b\u95f4\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362，\u5c31\u9700\u8981\u53c2\u6570\u662f\u7c7b\u7c7b\u578b\u76f8\u5173\u4e86
\nB(const A& a)
\n:_b(a.Get())
\n{
\n}
\nprivate:
\nint _b = 0;
\n};<\/p>\n

int main()
\n{
\n\/\/\u518d\u6765\u8ddf\u5927\u5bb6\u5c55\u793a\u4e00\u4e2a\u4f18\u5316，\u4e0a\u9762\u6ca1\u63d0\u5230
\n\/\/ \u6784\u9020
\nA a1(1);<\/p>\n

\/\/ \u8fd9\u91cc\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u5176\u5b9e\u5c31\u662f，2\u4e3a\u53c2\u6570\u6784\u9020\u4e34\u65f6\u5bf9\u8c61，\u4e34\u65f6\u5bf9\u8c61\u62f7\u8d1d\u6784\u9020a2 -> \u4f18\u5316\u4e3a\u76f4\u63a5\u6784\u9020
\nA a2 = 2;
\n\/\/\u8fd9\u91cc\u4e5f\u662f\u4e00\u6837
\nconst A& ref1 = 3;<\/p>\n

\/\/C++11\u4e4b\u540e\u624d\u652f\u6301\u591a\u53c2\u6570\u6784\u9020
\nA a3(1, 1);\/\/\u4e3a\u76f4\u63a5\u6784\u9020
\nA a4 = { 1, 1 };\/\/\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362
\nconst A& ref2 = { 1, 1 };\/\/\u540c\u6837\u90fd\u662f\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362<\/p>\n

\/\/Stack st1;
\n\/\/st1.Push(a4);
\n\/\/st1.Push({2,2});\/\/\u540c\u4e0a<\/p>\n

\/\/\u7c7b\u548c\u7c7b\u4e4b\u95f4\u7684\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362，\u8ddf\u4e0a\u9762\u539f\u7406\u7c7b\u4f3c
\n\/\/\u5c06a3\u9690\u5f0f\u8f6c\u6362\u4e3ab1
\nconst B& ref4 = a3;<\/p>\n

\/\/\u539f\u7406\u5c31\u662f\u4e0b\u9762\u7684\u4ee3\u7801
\nB b1 = a3;
\nconst B& ref3 = b1;<\/p>\n

return 0;
\n} <\/p>\n

\u6211\u4eec\u73b0\u5728\u6240\u7528\u7684\u7f16\u8bd1\u5668\u57fa\u672c\u4e0a\u90fd\u5c06\u8fd9\u4e9b\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u7ed9\u4f18\u5316\u4e86，\u5c31\u4f18\u5316\u6389\u4ea7\u751f\u4e34\u65f6\u5bf9\u8c61\u8fd9\u4e00\u90e8\u5206\u4e86，\u76f4\u63a5\u6784\u9020，\u8fd9\u6837\u51cf\u5c11\u4e86\u62f7\u8d1d，\u63d0\u9ad8\u4e86\u6548\u7387\u3002<\/p>\n

\"\"<\/p>\n

\n

\u4e09\u3001static\u6210\u5458<\/h2>\n

\u2022 <\/span>\u7528static\u4fee\u9970\u7684\u6210\u5458\u53d8\u91cf，\u79f0\u4e4b\u4e3a\u9759\u6001\u6210\u5458\u53d8\u91cf，\u9759\u6001\u6210\u5458\u53d8\u91cf\u4e00\u5b9a\u8981\u5728\u7c7b\u5916\u8fdb\u884c\u521d\u59cb\u5316\u3002 <\/span><\/p>\n

\u2022 <\/span>\u9759\u6001\u6210\u5458\u53d8\u91cf\u4e3a\u6240\u6709\u7c7b\u5bf9\u8c61\u6240\u5171\u4eab，\u4e0d\u5c5e\u4e8e\u67d0\u4e2a\u5177\u4f53\u7684\u5bf9\u8c61，\u4e0d\u5b58\u5728\u5bf9\u8c61\u4e2d，\u5b58\u653e\u5728\u9759\u6001\u533a\u3002<\/span><\/p>\n

\u2022 <\/span>\u7528static\u4fee\u9970\u7684\u6210\u5458\u51fd\u6570，\u79f0\u4e4b\u4e3a\u9759\u6001\u6210\u5458\u51fd\u6570，\u9759\u6001\u6210\u5458\u51fd\u6570\u6ca1\u6709this\u6307\u9488\u3002 <\/span><\/p>\n

\u2022 <\/span>\u9759\u6001\u6210\u5458\u51fd\u6570\u4e2d\u53ef\u4ee5\u8bbf\u95ee\u5176\u4ed6\u7684\u9759\u6001\u6210\u5458，\u4f46\u662f\u4e0d\u80fd\u8bbf\u95ee\u975e\u9759\u6001\u7684，\u56e0\u4e3a\u6ca1\u6709this\u6307\u9488\u3002 <\/span><\/p>\n

\u2022 <\/span>\u975e\u9759\u6001\u7684\u6210\u5458\u51fd\u6570，\u53ef\u4ee5\u8bbf\u95ee\u4efb\u610f\u7684\u9759\u6001\u6210\u5458\u53d8\u91cf\u548c\u9759\u6001\u6210\u5458\u51fd\u6570\u3002 <\/span><\/p>\n

\u2022 <\/span>\u7a81\u7834\u7c7b\u57df\u5c31\u53ef\u4ee5\u8bbf\u95ee\u9759\u6001\u6210\u5458，\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d::\u9759\u6001\u6210\u5458 \u6216\u8005 \u5bf9\u8c61.\u9759\u6001\u6210\u5458 \u6765\u8bbf\u95ee\u9759\u6001\u6210\u5458\u53d8\u91cf\u548c\u9759\u6001\u6210\u5458\u51fd\u6570\u3002 <\/span><\/p>\n

\u2022 <\/span>\u9759\u6001\u6210\u5458\u4e5f\u662f\u7c7b\u7684\u6210\u5458，\u53d7public\u3001protected\u3001private \u8bbf\u95ee\u9650\u5b9a\u7b26\u7684\u9650\u5236\u3002 <\/span><\/p>\n

\u2022 <\/span>\u9759\u6001\u6210\u5458\u53d8\u91cf\u4e0d\u80fd\u5728\u58f0\u660e\u4f4d\u7f6e\u7ed9\u7f3a\u7701\u503c\u521d\u59cb\u5316，\u56e0\u4e3a\u7f3a\u7701\u503c\u662f\u4e2a\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5217\u8868\u7684，\u9759\u6001\u6210\u5458\u53d8\u91cf\u4e0d\u5c5e\u4e8e\u67d0\u4e2a\u5bf9\u8c61，\u4e0d\u8d70\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5217\u8868\u3002<\/span><\/p>\n

\u4e0b\u9762\u6211\u4eec\u7528\u4ee3\u7801\u6765\u8fdb\u4e00\u6b65\u8bf4\u660e\u6bcf\u4e2a\u7279\u70b9：<\/p>\n

#include<iostream>
\nusing namespace std;<\/p>\n

class A
\n{
\npublic:
\n\/\/\u975e\u9759\u6001\u7684\u6210\u5458\u51fd\u6570，\u53ef\u4ee5\u8bbf\u95ee\u4efb\u610f\u9759\u6001\u6210\u5458\u53d8\u91cf\u4ee5\u53ca\u975e\u9759\u6001\u7684\u6210\u5458\u53d8\u91cf
\nA(int a = 0)
\n:_a1(a)
\n, _a2(a)
\n{
\n++_count;
\n}<\/p>\n

A(const A& t)
\n{
\n++_count;
\n}<\/p>\n

\/\/\u2fae\u9759\u6001\u7684\u6210\u5458\u51fd\u6570，\u53ef\u4ee5\u8bbf\u95ee\u4efb\u610f\u7684\u9759\u6001\u6210\u5458\u53d8\u91cf\u548c\u9759\u6001\u6210\u5458\u51fd\u6570
\n\/\/\u9759\u6001\u6210\u5458\u51fd\u6570\u4e2d\u53ef\u4ee5\u8bbf\u95ee\u5176\u4ed6\u7684\u9759\u6001\u6210\u5458，\u4f46\u662f\u4e0d\u80fd\u8bbf\u95ee\u2fae\u9759\u6001\u7684，\u56e0\u4e3a\u6ca1\u6709this\u6307\u9488
\nstatic int GetCount()
\n{
\n\/\/ _a1++; \u4e0d\u80fd\u8bbf\u95ee\u975e\u9759\u6001\u6210\u5458，\u56e0\u4e3astatic\u6210\u5458\u51fd\u6570\u6ca1\u6709this
\nreturn _count;
\n}
\nprivate:
\nint _a1 = 1;
\nint _a2 = 1;
\n\/\/public:
\n\/\/ \u5728\u7c7b\u91cc\u9762\u58f0\u660e，\u4e14\u8fd9\u91cc\u4e0d\u53ef\u4ee5\u7528\u7f3a\u7701\u503c
\nstatic int _count;
\n\/\/\u53ef\u4ee5\u8fd0\u7528\u9759\u6001\u6210\u5458\u6765\u89e3\u51b3\u7edf\u8ba1A\u7c7b\u578b\u7684\u5bf9\u8c61\u521b\u5efa\u4e86\u591a\u5c11\u4e2a\u8fd9\u6837\u7684\u95ee\u9898
\n};<\/p>\n

int A::_count = 0;<\/p>\n

int main()
\n{
\n\/\/\u9759\u6001\u6210\u5458\u4e0d\u5b58\u5728\u5bf9\u8c61\u4e4b\u4e2d
\nA aa1;
\ncout << sizeof(aa1) << endl;\/\/8,\u8bf4\u660e_count\u4e0d\u5b58\u5728\u5bf9\u8c61\u4e2d<\/p>\n

A* ptr = nullptr;
\nA aa2 = 1;
\n\/\/\/\/\u7a81\u7834\u7c7b\u57df\u5c31\u53ef\u4ee5\u8bbf\u95ee，\u4f46\u662f\u53d7\u8bbf\u95ee\u9650\u5b9a\u7b26\u7684\u7ea6\u675f
\n\/\/cout << ptr->_count<< endl;
\n\/\/cout << aa1._count << endl;
\n\/\/cout << A::_count << endl;<\/p>\n

\/\/\u53d8\u6210\u79c1\u6709\u7684\u8bdd，\u9700\u8981\u4f7f\u7528\u4e00\u4e0b\u51fd\u6570\u6765\u83b7\u53d6\u4e86
\ncout << A::GetCount() << endl;\/\/\u7a81\u7834\u7c7b\u57df\u53ef\u4ee5\u8bbf\u95ee\u516c\u6709\u7684\u9759\u6001\u6210\u5458
\ncout << aa2.GetCount() << endl;
\ncout << ptr->GetCount() << endl;<\/p>\n

return 0;
\n} <\/p>\n

1.\u7ec3\u4e60\u98981：<\/h3>\n

\u6c421+2+3+…+n_\u725b\u5ba2\u9898\u9738_\u725b\u5ba2\u7f51<\/p>\n

class Sum
\n{
\npublic:
\n Sum()
\n {
\n _count+=_i;
\n ++_i;
\n }
\n static int RetCount()
\n {
\n return _count;
\n }
\nprivate:
\n static int _i;
\n static int _count;
\n};<\/p>\n

int Sum::_i=1;
\nint Sum::_count=0;<\/p>\n

class Solution {
\npublic:
\n int Sum_Solution(int n) {
\n Sum arr[n];\/\/\u8c03\u7528n\u6b21Sum\u7684\u6784\u9020\u51fd\u6570
\n return Sum::RetCount();
\n }
\n}; <\/p>\n

2.\u7ec3\u4e60\u98982：<\/h3>\n

\u518d\u6765\u770b\u4e2a\u7ec3\u4e60
\n#include<iostream>
\nusing namespace std;
\nclass A
\n{
\npublic:
\n A()
\n {
\n cout << " A()" << endl;
\n }<\/p>\n

~A()
\n {
\n cout << " ~A()" << endl;
\n }
\n};<\/p>\n

class B
\n{
\npublic:
\n B()
\n {
\n cout << " B()" << endl;
\n }<\/p>\n

~B()
\n {
\n cout << " ~B()" << endl;
\n }
\n};<\/p>\n

class C
\n{
\npublic:
\n C()
\n {
\n cout << " C()" << endl;
\n }<\/p>\n

~C()
\n {
\n cout << " ~C()" << endl;
\n }
\n};<\/p>\n

class D
\n{
\npublic:
\n D()
\n {
\n cout << " D()" << endl;
\n }<\/p>\n

~D()
\n {
\n cout << " ~D()" << endl;
\n }
\n};<\/p>\n

\/\/\u6784\u9020\u987a\u5e8f
\n\/\/\u6790\u6784\u987a\u5e8f
\nC c;
\nint main()
\n{
\n A a;
\n B b;
\n static D d;<\/p>\n

return 0;
\n} <\/p>\n

\u8fd9\u4e2a\u9898\u8981\u6211\u4eec\u6c42\u8fd9\u4e2a\u7a0b\u5e8f\u7684ABCD\u56db\u4e2a\u5bf9\u8c61\u7684\u6784\u9020\u987a\u5e8f\u548c\u6790\u6784\u987a\u5e8f，\u5927\u5bb6\u53ef\u4ee5\u81ea\u5df1\u8fd0\u884c\u4e00\u4e0b\u7b54\u6848\u5c31\u51fa\u6765\u4e86\u3002（\u6ce8\u610f：\u9759\u6001\u6210\u5458\u4e0d\u5b58\u50a8\u5728\u5bf9\u8c61\u4e2d，\u800c\u662f\u5b58\u50a8\u5728\u9759\u6001\u533a）<\/p>\n

\n

\u56db\u3001\u53cb\u5143<\/h2>\n

\u2022 <\/span>\u53cb\u5143\u63d0\u4f9b\u4e86\u4e00\u79cd\u7a81\u7834\u7c7b\u8bbf\u95ee\u9650\u5b9a\u7b26\u5c01\u88c5\u7684\u65b9\u5f0f，\u53cb\u5143\u5206\u4e3a：\u53cb\u5143\u51fd\u6570\u548c\u53cb\u5143\u7c7b，\u5728\u51fd\u6570\u58f0\u660e\u6216\u8005\u7c7b\u58f0\u660e\u7684\u524d\u9762\u52a0friend，\u5e76\u4e14\u628a\u53cb\u5143\u58f0\u660e\u653e\u5230\u4e00\u4e2a\u7c7b\u7684\u91cc\u9762\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5916\u90e8\u53cb\u5143\u51fd\u6570\u53ef\u8bbf\u95ee\u7c7b\u7684\u79c1\u6709\u548c\u4fdd\u62a4\u6210\u5458，\u53cb\u5143\u51fd\u6570\u4ec5\u4ec5\u662f\u4e00\u79cd\u58f0\u660e，\u4ed6\u4e0d\u662f\u7c7b\u7684\u6210\u5458\u51fd\u6570\u3002 <\/span><\/p>\n

\u2022 <\/span>\u53cb\u5143\u51fd\u6570\u53ef\u4ee5\u5728\u7c7b\u5b9a\u4e49\u7684\u4efb\u4f55\u5730\u65b9\u58f0\u660e，\u4e0d\u53d7\u7c7b\u8bbf\u95ee\u9650\u5b9a\u7b26\u9650\u5236\u3002 <\/span><\/p>\n

\u2022 <\/span>\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u662f\u591a\u4e2a\u7c7b\u7684\u53cb\u5143\u51fd\u6570\u3002 <\/span><\/p>\n

\u2022 <\/span>\u53cb\u5143\u7c7b\u4e2d\u7684\u6210\u5458\u51fd\u6570\u90fd\u53ef\u4ee5\u662f\u53e6\u4e00\u4e2a\u7c7b\u7684\u53cb\u5143\u51fd\u6570，\u90fd\u53ef\u4ee5\u8bbf\u95ee\u53e6\u4e00\u4e2a\u7c7b\u4e2d\u7684\u79c1\u6709\u548c\u4fdd\u62a4\u6210\u5458\u3002 <\/span><\/p>\n

\u2022 <\/span>\u53cb\u5143\u7c7b\u7684\u5173\u7cfb\u662f\u5355\u5411\u7684，\u4e0d\u5177\u6709\u4ea4\u6362\u6027，\u6bd4\u5982A\u7c7b\u662fB\u7c7b\u7684\u53cb\u5143，\u4f46\u662fB\u7c7b\u4e0d\u662fA\u7c7b\u7684\u53cb\u5143\u3002 <\/span><\/p>\n

\u2022 <\/span>\u53cb\u5143\u7c7b\u5173\u7cfb\u4e0d\u80fd\u4f20\u9012，\u5982\u679cA\u662fB\u7684\u53cb\u5143， B\u662fC\u7684\u53cb\u5143，\u4f46\u662fA\u4e0d\u662fC\u7684\u53cb\u5143\u3002 <\/span><\/p>\n

\u2022 <\/span>\u6709\u65f6\u63d0\u4f9b\u4e86\u4fbf\u5229\u3002\u4f46\u662f\u53cb\u5143\u4f1a\u589e\u52a0\u8026\u5408\u5ea6，\u7834\u574f\u4e86\u5c01\u88c5，\u6240\u4ee5\u53cb\u5143\u4e0d\u5b9c\u591a\u7528\u3002<\/span><\/p>\n

\u4e0b\u9762\u6211\u4eec\u6765\u7528\u4ee3\u7801\u8bf4\u660e\u6bcf\u4e2a\u7279\u70b9：<\/p>\n

1.\u53cb\u5143\u51fd\u6570：<\/h3>\n

\/\/\u53cb\u5143\u51fd\u6570
\n#include<iostream>
\nusing namespace std;<\/p>\n

\/\/\u524d\u7f6e\u58f0\u660eB\u7c7b，\u5426\u5219A\u7684\u53cb\u5143\u51fd\u6570\u58f0\u660e\u90a3\u91cc\u7f16\u8bd1\u5668\u4e0d\u8ba4\u8bc6B
\n\/\/\u56e0\u4e3a\u53ea\u4f1a\u5411\u4e0a\u627e
\nclass B;<\/p>\n

class A
\n{
\n\/\/ \u53cb\u5143\u58f0\u660e
\nfriend void func(const A& aa, const B& bb);
\nprivate:
\nint _a1 = 1;
\nint _a2 = 2;
\n};<\/p>\n

class B
\n{
\n\/\/ \u53cb\u5143\u58f0\u660e
\nfriend void func(const A& aa, const B& bb);
\nprivate:
\nint _b1 = 3;
\nint _b2 = 4;
\n};<\/p>\n

void func(const A& aa, const B& bb)
\n{
\ncout << aa._a1 << endl;
\ncout << bb._b1 << endl;
\n}<\/p>\n

int main()
\n{
\nA aa1;
\nB bb1;
\nfunc(aa1, bb1);
\nreturn 0;
\n} <\/p>\n

2.\u53cb\u5143\u7c7b：<\/h3>\n

\/\/\u53cb\u5143\u7c7b，\u58f0\u660e\u548c\u5b9a\u4e49\u9700\u8981\u5206\u79bb，\u4e0d\u7136\u5c31\u7b97\u524d\u7f6e\u58f0\u660e\u4e5f\u89e3\u51b3\u4e0d\u4e86\u95ee\u9898，\u56e0\u4e3a\u627e\u4e0d\u5230\u7c7b\u91cc\u9762\u7684\u6210\u5458
\n#include<iostream>
\nusing namespace std;<\/p>\n

\/\/xxx.h
\n\/\/\u524d\u7f6e\u58f0\u660e
\nclass D;
\nclass C
\n{
\n\/\/ \u53cb\u5143\u58f0\u660e
\nfriend class D;
\npublic:
\nvoid func1(const D& dd);
\nprivate:
\nint _a1 = 1;
\nint _a2 = 2;
\n};<\/p>\n

class D
\n{
\nfriend class C;
\npublic:
\nvoid func1(const C& aa);
\nvoid func2(const C& aa);
\nprivate:
\nint _b1 = 3;
\nint _b2 = 4;
\n};<\/p>\n

\/\/xxx.cpp
\nvoid C::func1(const D& dd)
\n{
\ncout << dd._b1 << endl;
\n}
\nvoid D::func1(const C& aa)
\n{
\ncout << aa._a1 << endl;
\ncout << _b1 << endl;
\n}<\/p>\n

void D::func2(const C& aa)
\n{
\ncout << aa._a2 << endl;
\ncout << _b2 << endl;
\n}<\/p>\n

\/\/test.cpp
\nint main()
\n{
\nC cc;
\nD dd;
\ncc.func1(dd);
\ndd.func1(cc);
\ndd.func2(cc);<\/p>\n

return 0;
\n} <\/p>\n

\n

\u4e94\u3001\u5185\u90e8\u7c7b<\/h2>\n

\u2022 <\/span>\u5982\u679c\u4e00\u4e2a\u7c7b\u5b9a\u4e49\u5728\u53e6\u4e00\u4e2a\u7c7b\u7684\u5185\u90e8，\u8fd9\u4e2a\u5185\u90e8\u7c7b\u5c31\u53eb\u505a\u5185\u90e8\u7c7b\u3002\u5185\u90e8\u7c7b\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u7c7b，\u8ddf\u5b9a\u4e49\u5728\u5168\u5c40\u76f8\u6bd4，\u4ed6\u53ea\u662f\u53d7\u5916\u90e8\u7c7b\u7c7b\u57df\u9650\u5236\u548c\u8bbf\u95ee\u9650\u5b9a\u7b26\u9650\u5236，\u6240\u4ee5\u5916\u90e8\u7c7b\u5b9a\u4e49\u7684\u5bf9\u8c61\u4e2d\u4e0d\u5305\u542b\u5185\u90e8\u7c7b\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5185\u90e8\u7c7b\u9ed8\u8ba4\u662f\u5916\u90e8\u7c7b\u7684\u53cb\u5143\u7c7b\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5185\u90e8\u7c7b\u672c\u8d28\u4e5f\u662f\u4e00\u79cd\u5c01\u88c5，\u5f53A\u7c7b\u8ddfB\u7c7b\u7d27\u5bc6\u5173\u8054，A\u7c7b\u5b9e\u73b0\u51fa\u6765\u4e3b\u8981\u5c31\u662f\u7ed9B\u7c7b\u4f7f\u7528，\u90a3\u4e48\u53ef\u4ee5\u8003\u8651\u628aA\u7c7b\u8bbe\u8ba1\u4e3aB\u7684\u5185\u90e8\u7c7b，\u5982\u679c\u653e\u5230private\/protected\u4f4d\u7f6e，\u90a3\u4e48A\u7c7b\u5c31\u662fB\u7c7b\u7684\u4e13\u5c5e\u5185\u90e8\u7c7b，\u5176\u4ed6\u5730\u65b9\u90fd\u7528\u4e0d\u4e86\u3002<\/span><\/p>\n

\u4e0b\u9762\u7528\u4ee3\u7801\u8be6\u89e3\u5404\u4e2a\u7279\u70b9：<\/p>\n

#include<iostream>
\nusing namespace std;<\/p>\n

class A
\n{
\nprivate:
\nstatic int _k;
\nint _h = 1;
\npublic:
\n\/\/ \u5185\u90e8\u7c7b
\nclass B \/\/ B\u9ed8\u8ba4\u5c31\u662fA\u7684\u53cb\u5143
\n{
\npublic:
\nvoid foo(const A& a)
\n{
\ncout << _k << endl; \/\/OK
\ncout << a._h << endl; \/\/OK
\n}
\nprivate:
\nint _b1;
\n};
\n};<\/p>\n

int A::_k = 0;<\/p>\n

int main()
\n{
\n\/\/\u9759\u6001\u6210\u5458\u53d8\u91cf\u548c\u5185\u90e8\u7c7b\u90fd\u4e0d\u7b97
\ncout << sizeof(A) << endl;\/\/4,\u8bf4\u660e\u9759\u6001\u6210\u5458\u548c\u5185\u90e8\u7c7b\u4e0d\u5b58\u5728\u4e8e\u5bf9\u8c61\u4e2d<\/p>\n

\/\/ \u53d7\u5916\u90e8\u7c7b\u7c7b\u57df\u9650\u5236\u548c\u8bbf\u95ee\u9650\u5b9a\u7b26\u9650\u5236
\nA::B bb;<\/p>\n

A aa;
\nbb.foo(aa);<\/p>\n

return 0;
\n} <\/p>\n

\u6211\u4eec\u5728\u4e86\u89e3\u5b8c\u5185\u90e8\u7c7b\u4e4b\u540e\u53ef\u4ee5\u5c06\u524d\u9762\u7684\u4ece1\u52a0\u5230n\u7684\u9898\u4f18\u5316\u4e00\u4e0b：<\/p>\n

class Solution {
\n class Sum {\/\/\u4f18\u5316\u4e3a\u5185\u90e8\u7c7b
\n public:
\n Sum() {
\n _count += _i;
\n ++_i;
\n }
\n static int RetCount() {
\n return _count;
\n }
\n private:
\n static int _i;
\n static int _count;
\n };
\n public:
\n int Sum_Solution(int n) {
\n Sum arr[n];\/\/\u8c03\u7528n\u6b21Sum\u7684\u6784\u9020\u51fd\u6570
\n return Sum::RetCount();
\n }
\n};
\nint Solution::Sum::_i = 1;
\nint Solution::Sum::_count = 0; <\/p>\n

\n

\u516d\u3001\u533f\u540d\u5bf9\u8c61<\/h2>\n

\u2022 <\/span>\u7528 \u7c7b\u578b(\u5b9e\u53c2) \u5b9a\u4e49\u51fa\u6765\u7684\u5bf9\u8c61\u53eb\u505a\u533f\u540d\u5bf9\u8c61<\/span>，\u76f8\u6bd4\u4e4b\u524d\u6211\u4eec\u5b9a\u4e49\u7684 \u7c7b\u578b \u5bf9\u8c61\u540d(\u5b9e\u53c2) \u5b9a\u4e49\u51fa\u6765\u7684\u53eb\u6709\u540d\u5bf9\u8c61\u3002<\/span><\/p>\n

\u2022 <\/span>\u533f\u540d\u5bf9\u8c61\u751f\u547d\u5468\u671f\u53ea\u5728\u5f53\u524d\u4e00\u884c，\u4e00\u822c\u4e34\u65f6\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61\u5f53\u524d\u7528\u4e00\u4e0b\u5373\u53ef，\u5c31\u53ef\u4ee5\u5b9a\u4e49\u533f\u540d\u5bf9\u8c61\u3002<\/span><\/p>\n

\u2022 <\/span>const \u5f15\u7528\u4f1a\u5ef6\u957f\u533f\u540d\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f，\u4f7f\u5176\u751f\u547d\u5468\u671f\u8ddfconst \u5f15\u7528\u4e00\u6837\u3002<\/span><\/p>\n

\u4e0b\u9762\u6211\u4eec\u7528\u4ee3\u7801\u8be6\u89e3\u5404\u4e2a\u7279\u70b9：<\/p>\n

\/\/\u533f\u540d\u5bf9\u8c61
\n\/\/\u5148\u62ff\u4e0a\u9762\u7684\u4e3a\u4f8b
\n#include<iostream>
\nusing namespace std;<\/p>\n

class Solution
\n{
\nclass Sum
\n{
\npublic:
\nSum()
\n{
\n_ret += _i;
\n_i++;
\n}
\n};
\npublic:
\nint Sum_Solution(int n)
\n{
\n\/\/Sum arr[n];\/\/\u8981\u53d8\u957f\u6570\u7ec4，vs\u4e0d\u652f\u6301
\nreturn _ret;
\n}
\n\/\/\u52a0\u4e2aclear\u548c\u6790\u6784
\nvoid clear()
\n{
\n_i = 1;
\n_ret = 0;
\n}<\/p>\n

~Solution()
\n{
\ncout << "~Solution()" << '\\\\n';
\n}<\/p>\n

private:
\nstatic int _ret;
\nstatic int _i;
\n};
\nint Solution::_i = 1;
\nint Solution::_ret = 0;<\/p>\n

void fun(const Solution& s = Solution(), int i = 1)\/\/\u7f3a\u7701\u503c\u76f4\u63a5\u7ed9\u533f\u540d\u5bf9\u8c61
\n{<\/p>\n

}<\/p>\n

int main()
\n{
\nSolution s;\/\/\u6709\u540d\u5bf9\u8c61
\ncout << s.Sum_Solution(10) << '\\\\n';
\ns.clear();<\/p>\n

\/\/\u533f\u540d\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u53ea\u5728\u5f53\u524d\u884c
\nSolution(); \/\/\u533f\u540d\u5bf9\u8c61
\n\/\/const \u5f15\u7528\u4f1a\u5ef6\u957f\u533f\u540d\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f，\u751f\u547d\u5468\u671f\u8ddfconst \u5f15\u7528\u4e00\u6837
\nconst Solution& ref = Solution();<\/p>\n

return 0;
\n} <\/p>\n

\n

\u4e03\u3001\u5bf9\u8c61\u62f7\u8d1d\u65f6\u7684\u7f16\u8bd1\u5668\u4f18\u5316<\/h2>\n

\u2022 <\/span>\u73b0\u4ee3\u7f16\u8bd1\u5668\u4f1a\u4e3a\u4e86\u5c3d\u53ef\u80fd\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387，\u5728\u4e0d\u5f71\u54cd\u6b63\u786e\u6027\u7684\u60c5\u51b5\u4e0b\u4f1a\u5c3d\u53ef\u80fd\u51cf\u5c11\u4e00\u4e9b\u4f20\u53c2\u548c\u4f20\u8fd4\u56de\u503c\u7684\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u7701\u7565\u7684\u62f7\u8d1d\u3002 <\/span><\/p>\n

\u2022 <\/span>\u5982\u4f55\u4f18\u5316C++\u6807\u51c6\u5e76\u6ca1\u6709\u4e25\u683c\u89c4\u5b9a，\u5404\u4e2a\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u60c5\u51b5\u81ea\u884c\u5904\u7406\u3002\u5f53\u524d\u4e3b\u6d41\u7684\u76f8\u5bf9\u65b0\u4e00\u70b9\u7684\u7f16\u8bd1\u5668\u5bf9\u4e8e\u8fde\u7eed\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6b65\u9aa4\u4e2d\u7684\u8fde\u7eed\u62f7\u8d1d\u4f1a\u8fdb\u884c\u5408\u5e76\u4f18\u5316，\u6709\u4e9b\u66f4\u65b0\u66f4"\u6fc0\u8fdb"\u7684\u7f16\u8bd1\u5668\u8fd8\u4f1a\u8fdb\u884c\u8de8\u884c\u8de8\u8868\u8fbe\u5f0f\u7684\u5408\u5e76\u4f18\u5316\u3002 <\/span><\/p>\n

\u2022 <\/span>linux\u4e0b\u53ef\u4ee5\u5c06\u4e0b\u9762\u4ee3\u7801\u62f7\u8d1d\u5230test.cpp\u6587\u4ef6，\u7f16\u8bd1\u65f6\u7528 <\/span>g++ test.cpp -fno-elide-constructors<\/span> \u7684\u65b9\u5f0f\u5173\u95ed\u6784\u9020\u76f8\u5173\u7684\u4f18\u5316\u3002<\/span><\/p>\n

\u4e0b\u9762\u6211\u4eec\u7528\u4ee3\u7801\u8be6\u89e3：<\/p>\n

#include<iostream>
\nusing namespace std;<\/p>\n

class A
\n{
\npublic:
\nA(int a = 0)\/\/\u6784\u9020
\n:_a1(a)
\n{
\ncout << "A(int a)" << endl;
\n}<\/p>\n

A(const A& aa)\/\/\u62f7\u8d1d\u6784\u9020
\n:_a1(aa._a1)
\n{
\ncout << "A(const A& aa)" << endl;
\n}<\/p>\n

A& operator=(const A& aa)
\n{
\ncout << "A& operator=(const A& aa)" << endl;
\nif (this != &aa)
\n{
\n_a1 = aa._a1;
\n}
\nreturn *this;
\n}<\/p>\n

~A()
\n{
\ncout << "~A()" << endl;
\n}
\nprivate:
\nint _a1 = 1;
\n};<\/p>\n

void f1(A aa)
\n{<\/p>\n

}<\/p>\n

A f2()
\n{
\nA aa;
\nreturn aa;
\n}<\/p>\n

int main()
\n{
\n\/\/ \u6784\u9020+\u62f7\u8d1d\u6784\u9020 \u4f18\u5316-> \u6784\u9020<\/p>\n

\/\/ \u4f20\u503c\u4f20\u53c2
\n\/\/ \u6784\u9020
\nA aa1 = 1;
\ncout << "==================" << endl;
\n\/\/ \u62f7\u8d1d\u6784\u9020
\nf1(aa1);
\ncout << "==================" << endl;<\/p>\n

\/\/ \u9690\u5f0f\u7c7b\u578b，\u8fde\u7eed\u6784\u9020+\u62f7\u8d1d\u6784\u9020->\u4f18\u5316\u4e3a\u76f4\u63a5\u6784\u9020
\nf1(1);
\ncout << "==================" << endl;<\/p>\n

\/\/ \u2f00\u4e2a\u8868\u8fbe\u5f0f\u4e2d，\u8fde\u7eed\u6784\u9020+\u62f7\u8d1d\u6784\u9020->\u4f18\u5316\u4e3a\u2f00\u4e2a\u6784\u9020
\nf1(A(1));
\ncout << "==================" << endl;<\/p>\n

\/\/ \u4f20\u503c\u8fd4\u56de
\n\/\/ \u4e0d\u4f18\u5316\u7684\u60c5\u51b5\u4e0b\u4f20\u503c\u8fd4\u56de，\u7f16\u8bd1\u5668\u4f1a\u2f63\u6210\u2f00\u4e2a\u62f7\u8d1d\u8fd4\u56de\u5bf9\u8c61\u7684\u4e34\u65f6\u5bf9\u8c61\u4f5c\u4e3a\u51fd\u6570\u8c03\u2f64\u8868\u8fbe\u5f0f\u7684\u8fd4\u56de\u503c
\n\/\/ \u2f46\u4f18\u5316 （vs2019 debug）
\n\/\/ \u2f00\u4e9b\u7f16\u8bd1\u5668\u4f1a\u4f18\u5316\u5f97\u66f4\u5389\u5bb3，\u5c06\u6784\u9020\u7684\u5c40\u90e8\u5bf9\u8c61\u548c\u62f7\u8d1d\u6784\u9020\u7684\u4e34\u65f6\u5bf9\u8c61\u4f18\u5316\u4e3a\u76f4\u63a5\u6784\u9020（vs2022 debug）
\nf2();
\ncout << endl;<\/p>\n

\/\/ \u8fd4\u56de\u65f6\u2f00\u4e2a\u8868\u8fbe\u5f0f\u4e2d，\u8fde\u7eed\u62f7\u8d1d\u6784\u9020+\u62f7\u8d1d\u6784\u9020->\u4f18\u5316\u2f00\u4e2a\u62f7\u8d1d\u6784\u9020 （vs2019 debug）
\n\/\/ \u2f00\u4e9b\u7f16\u8bd1\u5668\u4f1a\u4f18\u5316\u5f97\u66f4\u5389\u5bb3，\u8fdb\u2f8f\u8de8\u2f8f\u5408\u5e76\u4f18\u5316，\u5c06\u6784\u9020\u7684\u5c40\u90e8\u5bf9\u8c61aa\u548c\u62f7\u8d1d\u7684\u4e34\u65f6\u5bf9\u8c61\u548c\u63a5\u6536\u8fd4\u56de\u503c\u5bf9\u8c61aa2\u4f18\u5316\u4e3a\u2f00\u4e2a\u76f4\u63a5\u6784\u9020\u3002（vs2022 debug）
\nA aa2 = f2();
\ncout << endl;<\/p>\n

\/\/ \u2f00\u4e2a\u8868\u8fbe\u5f0f\u4e2d，\u5f00\u59cb\u6784\u9020，\u4e2d\u95f4\u62f7\u8d1d\u6784\u9020+\u8d4b\u503c\u91cd\u8f7d->\u2f46\u6cd5\u4f18\u5316（vs2019 debug）
\n\/\/ \u2014\u4e9b\u7f16\u8bd1\u5668\u4f1a\u4f18\u5316\u5f97\u66f4\u5389\u5bb3，\u8fdb\u2f8f\u8de8\u2f8f\u5408\u5e76\u4f18\u5316，\u5c06\u6784\u9020\u7684\u5c40\u90e8\u5bf9\u8c61aa\u548c\u62f7\u8d1d\u4e34\u65f6\u5bf9\u8c61\u5408\u5e76\u4e3a\u2014\u4e2a\u76f4\u63a5\u6784\u9020（vs2022 debug）
\naa1 = f2();
\ncout << endl;<\/p>\n

return 0;
\n} <\/p>\n

\"\"\"\"<\/p>\n

\/\/ https:\/\/en.cppreference.com\/w\/cpp\/language\/copy_elision.html
\n\u63a5\u4e0a
\nA f2()
\n{
\n\/\/ NRVO
\n\/*A aa;
\ncout << &aa << endl;
\nreturn aa;*\/<\/p>\n

\/\/ URVO
\nreturn A(1);
\n}
\nint main()
\n{
\nA aa1 = f2();
\ncout << &aa1 << endl;<\/p>\n

return 0;
\n}<\/p>\n

\/\/\u6216\u8005-><\/p>\n

A f2()
\n{
\n\/\/ NRVO
\nA aa;
\ncout << &aa << endl;
\nreturn aa;<\/p>\n

\/\/ URVO
\n\/\/ return A(1);
\n}
\nint main()
\n{
\n\/\/\u4e0d\u63a8\u8350，\u7834\u574f\u4e86\u7f16\u8bd1\u5668\u7684\u4f18\u5316
\nA aa1;
\naa1 = f2();
\ncout << &aa1 << endl;<\/p>\n

\/\/ \u63a8\u8350
\nA aa2 = f2();
\nreturn 0;
\n} <\/p>\n

\"\"\"\"<\/p>\n

\n

\u672c\u7bc7\u535a\u5ba2\u7684\u5b8c\u6574\u539f\u4ee3\u7801：<\/p>\n

\u5c0f\u5f20\u540c\u5b66\u7684CPP\u4ed3\u5e93\u2014\u2014gitee.com<\/p>\n

\n

\u5f80\u671f\u56de\u987e：<\/p>\n

C++ \u7c7b\u548c\u5bf9\u8c61（\u56db）：const\u6210\u5458\u51fd\u6570\u3001\u53d6\u5730\u5740\u8fd0\u7b97\u7b26\u91cd\u8f7d\u5168\u7cbe\u8bb2-CSDN\u535a\u5ba2<\/p>\n

C++ Date\u65e5\u671f\u7c7b\u7684\u8bbe\u8ba1\u4e0e\u5b9e\u73b0\u5168\u89e3\u6790-CSDN\u535a\u5ba2<\/p>\n

C++ \u7c7b\u548c\u5bf9\u8c61（\u4e09）：\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u4e0e\u8d4b\u503c\u8fd0\u7b97\u7b26\u91cd\u8f7d\u4e4b\u6838\u5fc3\u5b9e\u73b0-CSDN\u535a\u5ba2<\/p>\n

C++ \u7c7b\u548c\u5bf9\u8c61（\u4e8c）：\u5b9e\u4f8b\u5316\u3001this\u6307\u9488\u3001\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u8be6\u89e3-CSDN\u535a\u5ba2<\/p>\n

\n

\u7ed3\u8bed：<\/p>\n

\u672c\u6587\u6df1\u5165\u8bb2\u89e3\u4e86C++\u7c7b\u548c\u5bf9\u8c61\u7684\u6838\u5fc3\u6982\u5ff5，\u5305\u62ec\u521d\u59cb\u5316\u5217\u8868\u3001\u7c7b\u578b\u8f6c\u6362\u3001static\u6210\u5458\u3001\u53cb\u5143\u5173\u7cfb\u548c\u533f\u540d\u5bf9\u8c61\u7b49\u7279\u6027\u3002\u91cd\u70b9\u5206\u6790\u4e86\u521d\u59cb\u5316\u5217\u8868\u7684\u4f7f\u7528\u89c4\u5219（\u5fc5\u987b\u521d\u59cb\u5316\u5f15\u7528\u3001const\u6210\u5458\u7b49）\u3001\u7c7b\u578b\u8f6c\u6362\u7684\u9690\u5f0f\u89c4\u5219（explicit\u7981\u6b62\u9690\u5f0f\u8f6c\u6362）\u3001static\u6210\u5458\u7684\u5171\u4eab\u7279\u6027（\u7c7b\u5916\u521d\u59cb\u5316）\u3001\u53cb\u5143\u5173\u7cfb\u7684\u5355\u5411\u6027\u7b49\u7279\u70b9，\u5982\u679c\u6587\u7ae0\u5bf9\u4f60\u6709\u5e2e\u52a9\u7684\u8bdd，\u6b22\u8fce\u8bc4\u8bba，\u70b9\u8d5e，\u6536\u85cf\u52a0\u5173\u6ce8，\u611f\u8c22\u5927\u5bb6\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

🔥\u4e2a\u4eba\u4e3b\u9875：\u5c0f\u5f20\u540c\u5b66 🎬\u4f5c\u8005\u7b80\u4ecb：C\u7814\u53d1\u65b9\u5411\u5b66\u4e60\u8005 📖\u4e2a\u4eba\u4e13\u680f：\u00a0\u300aC\u8bed\u8a00\u300b\u300a\u6570\u636e\u7ed3\u6784\u300b\u300aC\u6df1\u5ea6\u5256\u6790：\u4ece\u5165\u95e8\u5230\u6df1\u8015\u300b \u2b50\ufe0f\u4eba\u751f\u683c\u8a00：\u65e0\u89c6\u4e2d\u65ad，\u4e0d\u5f03\u70ed\u6795，\u65b9\u5f97\u575a\u6301\u4e4b\u9053\u3002 \u524d\u8a00：
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