{"rsdb":{"rid":"156019","subhead":"","postdate":"0","aid":"117125","fid":"49","uid":"1","topic":"1","content":"
\n

0. \u53c2\u8003\u4ee3\u7801<\/h2> \n
\r\n#ifndef __COMPLEX__\r\n#define __COMPLEX__\r\n\r\n#include \r\n\r\n\/\/\u524d\u7f6e\u58f0\u660e\r\nclass ostream;\r\nclass complex       \/\/class head\r\n{                   \/\/{} class body\r\npublic:\r\n    complex(double r = 0, double i = 0)\r\n        :re(r), im(i)\r\n    {}\r\n    complex& operator += (const complex&);\r\n    double real() const { return re; }\r\n    double imag() const { return im; }\r\n\r\n    friend complex & __doapl(complex*, const complex&);\r\n\r\n    int func(const complex ¶m)\r\n    {\r\n        return param.re + param.im;\r\n    }\r\nprivate:\r\n    double re, im;\r\n};\r\n\r\n\r\ninline complex&\r\n__doapl(complex*ths, const complex&r)\r\n{\r\n    ths->re += r.re;\r\n    ths->im += r.im;\r\n    return *ths;\r\n}\r\n\r\ninline complex&\r\ncomplex::operator +=(const complex &r)\r\n{\r\n    return __doapl(this, r);\r\n}\r\n\r\n#endif \/\/ !__COMPLEX__<\/pre> \n 

1. \u5728\u5934\u6587\u4ef6\u201dcomplex.h\u201d\u4e2d \u6dfb\u52a0\u9632\u5fa1\u5f0f\u58f0\u660e<\/h2> \n
\r\n#ifndef __COMPLEX__\r\n#define __COMPLEX__\r\n...\r\n#endif  \/\/__COMPLEX__<\/pre> \n 

\u8fd9\u662f\u4e3a\u4e86\u9632\u6b62\u5934\u6587\u4ef6\u88ab\u591a\u91cd\u5305\u542b\uff08multiple inclusion\uff09\uff0c\u5f15\u53d1\u7684\u7f16\u8bd1\u95ee\u9898<\/p> \n

2. inline\u51fd\u6570<\/h2> \u51fd\u6570\u76f4\u63a5\u5728class\u58f0\u660e\u5185\u5b9a\u4e49\u5b8c\u6210\uff0c\u4f1a\u81ea\u52a8\u58f0\u660e\u4e3ainline\u51fd\u6570\uff0c\u4f8b\u5982real()\uff0cimage()\u5c31\u662finline\u51fd\u6570\u6216\u8005\u52a0\u5173\u952e\u5b57\u58f0\u660e \u4f46\u662f\u5426\u662f\u6309\u7167inline\u65b9\u5f0f\u7f16\u8bd1\uff0c\u662f\u7f16\u8bd1\u5668\u51b3\u5b9a\u7684\uff0c\u6211\u4eec\u53ea\u662f\u5efa\u8bae\u7f16\u8bd1\u5668\u8fd9\u505a\u3002 \n
\r\ninline double \r\nimag(const complex& x)\r\n{    \r\n    return x.imag();  \r\n}<\/pre> \n 

3. constructor(ctor,\u6784\u9020\u51fd\u6570)<\/h2> \n
\r\ncomplex(double r = 0; double i = 0)\r\n        :re(r), im(i)   \/\/initialization list(\u521d\u59cb\u5316\u5217\u8868)\r\n    {}<\/pre> \n 

\u5982\u679c\u4e0d\u663e\u793a\u6307\u5b9aclass\u7684constructor\uff0cC++<\/a>\u4f1a\u9ed8\u8ba4\u521b\u5efa\u6784\u9020\u51fd\u6570\uff0c\u662f\u6ca1\u6709\u53c2\u6570\u7684 \u6784\u9020\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u53ef\u91cd\u8f7d(overloading)<\/p> \n

\u672c\u4f8b\u4e2d\uff0c\u6784\u9020\u662f\u663e\u793a\u6307\u5b9a\u7684\uff0c\u5e76\u4e14\u6709\u5e26\u6709\u9ed8\u8ba4\u503c\u7684\u4e24\u4e2a\u53c2\u6570<\/p> \n

initialization list(\u521d\u59cb\u5316\u5217\u8868):\u6784\u9020\u51fd\u6570\u72ec\u6709\u7684\uff0c\u5efa\u8bae\u628a\u6210\u5458\u53d8\u91cf\u653e\u5230\u8fd9\u91cc\u521d\u59cb\u5316 \u6210\u5458\u53d8\u91cf\u653e\u5728\u521d\u59cb\u5316\u5217\u8868\u4e2d\u548c\u5728\u51fd\u6570\u4f53\u5185\u90e8\u7684\u533a\u522b\u662f \u521d\u59cb\u5316\u5217\u8868\u662f\u5728\u6210\u5458\u53d8\u91cf\u521d\u59cb\u5316\u7684\u65f6\u5019\u5c31\u5df2\u7ecf\u6539\u597d\u4e86 \u51fd\u6570\u4f53\u5185\u90e8\u662f\u8d4b\u503c\uff0c\u662f\u6210\u5458\u53d8\u91cf\u5148\u521d\u59cb\u5316\uff0c\u7136\u540e\u518d\u628a\u8d4b\u503c\u7ed9\u6210\u5458\u53d8\u91cf\uff0c\u8fd9\u6837\u5c31\u591a\u4e86\u4e00\u4e2a\u6b65\u9aa4<\/p> \n

\u6ce8\u610f\u6784\u9020\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u90fd\u662fpublic\u7684\uff0c\u4f46\u662f\u5728\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5355\u4f8b\u6a21\u5f0f\u4e0b\uff0c\u901a\u5e38\u628a\u6784\u9020\u51fd\u6570\u8bbe\u4e3aprivate<\/p> \n

4. [\u5212\u91cd\u70b9]const member functions (\u5e38\u91cf\u6210\u5458\u51fd\u6570)<\/h2> \n
\r\ndouble real() const {return re;}<\/pre> \n 

\u5728\u7c7b\u6210\u5458\u51fd\u6570\u540d\u79f0\u540e\u9762\u52a0\u4e0aconst\uff0c\u9650\u5b9a\u51fd\u6570\u4f53\u5185\u90e8\u4e0d\u53ef\u6539\u53d8\u672c\u7c7b\u7684\u6210\u5458\u53d8\u91cf\uff0c\u6ce8\u610f\uff0c\u5e38\u91cf\u6210\u5458\u51fd\u6570\u5185\u90e8\u4e0d\u80fd\u8c03\u7528\u975e\u5e38\u91cf\u6210\u5458\u51fd\u6570<\/p> \n

\r\n    double real()  { return re; }\r\n    double imag()  { return im; }<\/pre> \n 

const\u7c7b\u578b\u7684\u5bf9\u8c61\u5b9e\u4f8b\u53ea\u80fd\u8c03\u7528const\u58f0\u660e\u8fc7\u7684\u6210\u5458\u51fd\u6570<\/p> \n

\u5982\u679c\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u7684\u51fd\u6570\u4e0d\u6dfb\u52a0const\uff0c\u90a3\u6309\u7167\u4e0b\u5217\u4f7f\u7528\u662f\u5c31\u4f1a\u51fa\u9519\uff0c<\/p> \n

\u62a5\u9519\u662f\u56e0\u4e3a \u4f7f\u7528const\u521b\u5efa \u5bf9\u8c61\u5b9e\u4f8b c1\uff0c\u90a3\u5c31\u610f\u5473\u7740c1\u6240\u6709\u7684\u6210\u5458\u53d8\u91cf\u90fd\u662f\u4e0d\u53ef\u6539\u53d8\u7684\uff0c\u4f46\u662freal(),image()\u5e76\u6ca1\u6709\u58f0\u660e\u79f0cosnt\u5e38\u91cf\u6210\u5458\u51fd\u6570\uff0c\u8fd9\u5c31\u8bf4\u660e\uff0c\u5728\u51fd\u6570\u4f53\u5185\u90e8\u662f\u5141\u8bb8\u6539\u53d8\u6210\u5458\u53d8\u91cf\u7684\uff0c \u5b58\u5728\u6b67\u4e49\uff0c\u6545\u800c\u62a5\u9519<\/p> \n

\u4f46\u662f\u6b64\u79cd\u7528\u6cd5\u662f\u5408\u7406\u7684\uff0c\u62a5\u9519\u5c31\u662f\u56e0\u4e3a\u6211\u4eec\u8bbe\u8ba1\u7684\u4e0d\u5408\u7406\uff0c\u6240\u4ee5\uff0c\u5f3a\u70c8\u5efa\u8bae\u628a\u4e0d\u9700\u8981\u6539\u53d8\u6210\u5458\u53d8\u91cf\u7684\u6210\u5458\u51fd\u6570\u4f7f\u7528const\u4fee\u9970<\/p> \n

\r\n\/\/ error\r\nconst complex c1(1, 2);\r\n\r\nstd::cout << c1.real() << std::endl;\r\nstd::cout << c1.imag() << std::endl;\r\n\r\n\/*  vs2013\u7684\u62a5\u9519\r\nerror C2662: \u201cdouble complex::real(void)\u201d: \u4e0d\u80fd\u5c06\u201cthis\u201d\u6307\u9488\u4ece\u201cconst complex\u201d\u8f6c\u6362\u4e3a\u201ccomplex &\u201d    \r\nerror C2662: \u201cdouble complex::imag(void)\u201d: \u4e0d\u80fd\u5c06\u201cthis\u201d\u6307\u9488\u4ece\u201cconst complex\u201d\u8f6c\u6362\u4e3a\u201ccomplex &\u201d    \r\n*\/<\/pre> \n 

5. \u53c2\u6570\u4f20\u9012\uff08\u503c\u548c\u5f15\u7528\uff09<\/h2> \n

(pass by value[\u503c\u4f20\u9012] vs pass by reference[\u5f15\u7528\u4f20\u9012](to const))<\/p> \n

\u5728\u51fd\u6570\u53c2\u6570\u4f20\u9012\u4e2d\uff0c\u4f7f\u7528\u5f15\u7528\u4f20\u9012\uff0c\u80fd\u591f\u6709\u6548\u7684\u63d0\u9ad8\u4f20\u9012\u8fc7\u7a0b\u4e2d\u5806\u6808\u5229\u7528\u7387\uff0c\u6240\u4ee5\u5efa\u8baeC++<\/a>\u4e2d\u8fdb\u884c\u51fd\u6570\u53c2\u6570\u4f20\u9012\u7684\u65f6\u5019\u5c3d\u91cf\u4f7f\u7528\u5f15\u7528\uff0c\u80fd\u591f\u6709\u6548\u5730\u8282\u7ea6\u5806\u6808\u7a7a\u95f4<\/p> \n

\u4f46\u662f\u4e3a\u4e86\u907f\u514d\u4f20\u5165\u53c2\u6570\u7684\u503c\u88ab\u610f\u5916\u4fee\u6539\uff0c\u53ef\u4ee5\u4f7f\u7528const complex &\uff0cconst\u7c7b\u578b\u7684\u5f15\u7528<\/p> \n

\r\ncomplex & __doapl(complex*, const complex&);<\/pre> \n 

6. friend(\u53cb\u5143)<\/h2> \n

\u58f0\u660e\u53cb\u5143\u7684\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7684\u7c7b\u7684\u79c1\u6709\u6210\u5458\u53d8\u91cf \u76f8\u540cclass\u7684\u5404\u4e2aobject\u4e92\u4e3afriends(\u53cb\u5143)<\/p> \n

\r\nclass complex\r\n{   ...\r\n    friend complex & __doapl(complex*, const complex&);\r\n    int func(const complex ¶m)\r\n    {   return param.re + param.im;    }\r\n    ...\r\n}\uff1b\r\ninline complex&\r\n__doapl(complex*ths, const complex&r)\r\n{\r\n    ths->re += r.re;\r\n    ths->im += r.im;\r\n    return *ths;\r\n}\r\n\r\n\/\/\u76f8\u540cclass\u7684\u5404\u4e2aobject\u4e92\u4e3afriends(\u53cb\u5143)\r\ncomplex c1(2,3);\r\ncomplex c2;\r\n\r\nc2.func(c1);<\/pre> \n 

7. \u64cd\u4f5c\u7b26\u91cd\u8f7d<\/h2> \n

1\u3001\u91cd\u8f7d\u64cd\u4f5c\u7b26\u6ca1\u5fc5\u8981\u4e00\u5b9a\u662f\u6210\u5458\u51fd\u6570\uff0c\u8fd8\u53ef\u4ee5\u662f\u53cb\u5143\u51fd\u6570\u3002<\/p> \n

2\u3001\u91cd\u8f7d\u64cd\u4f5c\u7b26\u51fd\u6570\u4e3a\u6210\u5458\u51fd\u6570\u4e3b\u8981\u662f\u4f60\u9700\u8981\u64cd\u4f5c\u7c7b\u5185\u90e8\u7684\u6210\u5458\uff0c \u5fc5\u987b\u662f\u6210\u5458\u51fd\u6570\u6216\u53cb\u5143\u51fd\u6570\u624d\u884c\u3002<\/p> \n

3\u3001\u81f3\u4e8e\u7531\u6df1\u6d45\u62f7\u8d1d\u7684\u539f\u56e0\u8981\u4f7f\u5176\u6210\u4e3a\u6210\u5458\u51fd\u6570\uff0c\u8fd9\u4e2a\u4e0d\u77e5\u9053\u3002<\/p> \n

4\u3001\u5982\u679c\u8fd0\u7b97\u7b26\u88ab\u91cd\u8f7d\u4e3a\u5168\u5c40\u51fd\u6570\uff0c\u90a3\u4e48\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u8fd0\u7b97\u7b26\u53eb\u505a\u4e00\u5143\u8fd0\u7b97\u7b26\uff0c\u6709\u4e24\u4e2a\u53c2\u6570\u7684\u8fd0\u7b97\u7b26\u53eb\u505a\u4e8c\u5143\u8fd0\u7b97\u7b26\u3002<\/p> \n

\u5982\u679c\u8fd0\u7b97\u7b26\u88ab\u91cd\u8f7d\u4e3a\u7c7b\u7684\u6210\u5458\u51fd\u6570\uff0c\u90a3\u4e48\u4e00\u5143\u8fd0\u7b97\u7b26\u6ca1\u6709\u53c2\u6570\uff0c\u4e8c\u5143\u8fd0\u7b97\u7b26\u53ea\u6709\u4e00\u4e2a\u53f3\u4fa7\u53c2\u6570\uff0c\u56e0\u4e3a\u5bf9\u8c61\u81ea\u5df1\u6210\u4e86\u5de6\u4fa7\u53c2\u6570(cosnt T *this)\u3002<\/p> \n

\u8bed\u6cd5\u4e0a\u8bb2\uff0c\u8fd0\u7b97\u7b26\u65e2\u53ef\u4ee5\u5b9a\u4e49\u4e3a\u5168\u5c40\u51fd\u6570\uff0c\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u4e3a\u6210\u5458\u51fd\u6570\u3002\u6587\u732e[Murray , p44-p47]\u5bf9\u6b64\u95ee\u9898\u4f5c\u4e86\u8f83\u591a\u7684\u9610\u8ff0\uff0c\u5e76\u603b\u7ed3\u4e86\u88688-4-1\u7684\u89c4\u5219\u3002<\/p> \n \n \n \n \n \n \n \n \n
\u8fd0\u7b97\u7b26<\/th> \n \u89c4\u5219<\/th> \n <\/tr> \n <\/thead> \n
\u6240\u6709\u7684\u4e00\u5143\u8fd0\u7b97\u7b26<\/td> \n \u5efa\u8bae\u91cd\u8f7d\u4e3a\u6210\u5458\u51fd\u6570<\/td> \n <\/tr> \n
= () [] -><\/td> \n \u53ea\u80fd\u91cd\u8f7d\u4e3a\u6210\u5458\u51fd\u6570<\/td> \n <\/tr> \n
+= -= \/= *= &=<\/td> \n = ~= %= >>= <<=<\/td> \n <\/tr> \n
\u6240\u6709\u5176\u5b83\u8fd0\u7b97\u7b26<\/td> \n \u5efa\u8bae\u91cd\u8f7d\u4e3a\u5168\u5c40\u51fd\u6570<\/td> \n <\/tr> \n <\/tbody> \n <\/table> \n

\u5bf9\u4e8e\u8d4b\u503c\u64cd\u4f5c\u7b26(=),\u8fd9\u4e2a\u6bd4\u8f83\u7279\u522b\uff0c\u56e0\u4e3a\u4efb\u4f55\u7c7b\u5982\u679c\u4e0d\u63d0\u4f9b\u663e\u793a\u7684\u62f7\u8d1d\u8d4b\u503c(\u5373\u91cd\u8f7d\uff1d)\uff0c\u5219\u7f16\u8bd1\u5668\u4f1a\u9690\u5f0f\u5730\u63d0\u4f9b\u4e00\u4e2a\u3002\u8fd9\u6837\u7684\u8bdd\uff0c\u5982\u679c\u4f60\u518d\u901a\u8fc7\u53cb\u5143\u58f0\u660e\uff0c\u8fdb\u884c\u5168\u5c40\u7684\u5b9a\u4e49\u4f1a\u9020\u6210\u8c03\u7528\u4e8c\u4e49\u6027\uff08\u5373\u4f7f\u5141\u8bb8\uff0c\u7f16\u8bd1\u4e5f\u4f1a\u51fa\u9519\uff09\u3002<\/p> \n

\u5bf9\u4e8e\u64cd\u4f5c\u7b26(=,[],(),->)\uff0c\u53ea\u80fd\u58f0\u660e\u4e3a\u6210\u5458\u51fd\u6570\u662f\u4e3a\u4e86\u907f\u514d\u4e0d\u5408\u6cd5\u7684\u4e66\u5199\u901a\u8fc7\u7f16\u8bd1\uff08\u8fd9\u662f\u63a8\u6d4b\u51fa\u7684\u539f\u56e0\uff0c\u66f4\u6df1\u5c42\u7684\u53ef\u80fd\u8981\u7814\u7a76 C++ \u7684\u8bbe\u8ba1\u4e86\uff09\u3002\u8fd9\u6d89\u53ca\u5230 C++ \u4e2d\u7c7b\u578b\u7684\u9690\u5f0f\u8f6c\u6362\u3002","orderid":"0","title":"C++\u7b14\u8bb0\u4e00\uff08\u521b\u5efa\u4e00\u4e2a\u4e0d\u5e26\u6307\u9488\u6210\u5458\u53d8\u91cf\u7684\u7c7b\uff09[\u6ce8\u610f\u4e8b\u9879](\u4e00)","smalltitle":"","mid":"0","fname":"c++\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"41","pages":"2","comments":"0","posttime":"2017-01-11 08:14:55","list":"1484093695","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"http:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"\u7b14\u8bb0<\/A> \u521b\u5efa<\/A> \u4e00\u4e2a<\/A> \u6307\u9488<\/A> \u6210\u5458<\/A> \u53d8\u91cf<\/A> \u6ce8\u610f\u4e8b\u9879<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"14.17.22.36","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"C++\u7b14\u8bb0\u4e00\uff08\u521b\u5efa\u4e00\u4e2a\u4e0d\u5e26\u6307\u9488\u6210\u5458\u53d8\u91cf\u7684\u7c7b\uff09[\u6ce8\u610f\u4e8b\u9879]","lastview":"1484903520","digg_num":"0","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}