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\u00a0\u00a0\u00a0
\nA(void);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u7f3a\u7701\u7684\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 A(const A
\n&a);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u7f3a\u7701\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0
\n~A(void);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u7f3a\u7701\u7684\u6790\u6784\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 A
\n& operate =(const A
\n&a);\u00a0\u00a0\u00a0
\n\/\/ \u7f3a\u7701\u7684\u8d4b\u503c\u51fd\u6570<\/p>\n

\u00a0<\/p>\n

\u8fd9\u4e0d\u7981\u8ba9\u4eba\u7591\u60d1\uff0c\u65e2\u7136\u80fd\u81ea\u52a8\u751f\u6210\u51fd\u6570\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u8981\u7a0b\u5e8f\u5458\u7f16\u5199\uff1f<\/p>\n

\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n

\n\uff081\uff09\u5982\u679c\u4f7f\u7528\u201c\u7f3a\u7701\u7684\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570\u201d\u548c\u201c\u7f3a\u7701\u7684\u6790\u6784\u51fd\u6570\u201d\uff0c\u7b49\u4e8e\u653e\u5f03\u4e86\u81ea\u4e3b\u201c\u521d\u59cb\u5316\u201d\u548c\u201c\u6e05\u9664\u201d\u7684\u673a\u4f1a\uff0cC++\u53d1\u660e\u4ebaStroustrup\u7684\u597d\u5fc3\u597d\u610f\u767d\u8d39\u4e86\u3002<\/p>\n

\n\uff082\uff09\u201c\u7f3a\u7701\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u201d\u548c\u201c\u7f3a\u7701\u7684\u8d4b\u503c\u51fd\u6570\u201d\u5747\u91c7\u7528\u201c\u4f4d\u62f7\u8d1d\u201d\u800c\u975e\u201c\u503c\u62f7\u8d1d\u201d\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\uff0c\u5018\u82e5\u7c7b\u4e2d\u542b\u6709\u6307\u9488\u53d8\u91cf\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u6ce8\u5b9a\u5c06\u51fa\u9519\u3002<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

\n\u5bf9\u4e8e\u90a3\u4e9b\u6ca1\u6709\u5403\u591f\u82e6\u5934\u7684C++\u7a0b\u5e8f\u5458\uff0c\u5982\u679c\u4ed6\u8bf4\u7f16\u5199\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u4e0e\u8d4b\u503c\u51fd\u6570\u5f88\u5bb9\u6613\uff0c\u53ef\u4ee5\u4e0d\u7528\u52a8\u8111\u7b4b\uff0c\u8868\u660e\u4ed6\u7684\u8ba4\u8bc6\u8fd8\u6bd4\u8f83\u80a4\u6d45\uff0c\u6c34\u5e73\u6709\u5f85\u4e8e\u63d0\u9ad8\u3002<\/p>\n

\u672c\u7ae0\u4ee5\u7c7bString\u7684\u8bbe\u8ba1\u4e0e\u5b9e\u73b0\u4e3a\u4f8b\uff0c\u6df1\u5165\u9610\u8ff0\u88ab\u5f88\u591a\u6559\u79d1\u4e66\u5ffd\u89c6\u4e86\u7684\u9053\u7406\u3002String\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

\u00a0\u00a0\u00a0 class
\nString<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0
\npublic:<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nString(const char *str =
\nNULL);\u00a0\u00a0\u00a0 \/\/
\n\u666e\u901a\u6784\u9020\u51fd\u6570<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nString(const String
\n&other);\u00a0\u00a0\u00a0
\n\/\/ \u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n~
\nString(void);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u6790\u6784\u51fd\u6570<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nString & operate =(const String
\n&other);\u00a0\u00a0\u00a0
\n\/\/ \u8d4b\u503c\u51fd\u6570<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0
\nprivate:<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nchar\u00a0\u00a0\u00a0\u00a0\u00a0
\n*m_data;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u7528\u4e8e\u4fdd\u5b58\u5b57\u7b26\u4e32<\/p>\n

\u00a0\u00a0\u00a0 };<\/p>\n

9.1 \u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570\u7684\u8d77\u6e90<\/font><\/strong><\/p>\n

\n\u4f5c\u4e3a\u6bd4C\u66f4\u5148\u8fdb\u7684\u8bed\u8a00\uff0cC++\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u673a\u5236\u6765\u589e\u5f3a\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\u3002C++\u7f16\u8bd1\u5668\u5177\u6709\u4e25\u683c\u7684\u7c7b\u578b\u5b89\u5168\u68c0\u67e5\u529f\u80fd\uff0c\u5b83\u51e0\u4e4e\u80fd\u627e\u51fa\u7a0b\u5e8f\u4e2d\u6240\u6709\u7684\u8bed\u6cd5\u95ee\u9898\uff0c\u8fd9\u7684\u786e\u5e2e\u4e86\u7a0b\u5e8f\u5458\u7684\u5927\u5fd9\u3002\u4f46\u662f\u7a0b\u5e8f\u901a\u8fc7\u4e86\u7f16\u8bd1\u68c0\u67e5\u5e76\u4e0d\u8868\u793a\u9519\u8bef\u5df2\u7ecf\u4e0d\u5b58\u5728\u4e86\uff0c\u5728\u201c\u9519\u8bef\u201d\u7684\u5927\u5bb6\u5ead\u91cc\uff0c\u201c\u8bed\u6cd5\u9519\u8bef\u201d\u7684\u5730\u4f4d\u53ea\u80fd\u7b97\u662f\u5c0f\u5f1f\u5f1f\u3002\u7ea7\u522b\u9ad8\u7684\u9519\u8bef\u901a\u5e38\u9690\u85cf\u5f97\u5f88\u6df1\uff0c\u5c31\u8c61\u72e1\u733e\u7684\u7f6a\u72af\uff0c\u60f3\u902e\u4f4f\u4ed6\u53ef\u4e0d\u5bb9\u6613\u3002<\/p>\n

\n\u6839\u636e\u7ecf\u9a8c\uff0c\u4e0d\u5c11\u96be\u4ee5\u5bdf\u89c9\u7684\u7a0b\u5e8f\u9519\u8bef\u662f\u7531\u4e8e\u53d8\u91cf\u6ca1\u6709\u88ab\u6b63\u786e\u521d\u59cb\u5316\u6216\u6e05\u9664\u9020\u6210\u7684\uff0c\u800c\u521d\u59cb\u5316\u548c\u6e05\u9664\u5de5\u4f5c\u5f88\u5bb9\u6613\u88ab\u4eba\u9057\u5fd8\u3002Stroustrup\u5728\u8bbe\u8ba1C++\u8bed\u8a00\u65f6\u5145\u5206\u8003\u8651\u4e86\u8fd9\u4e2a\u95ee\u9898\u5e76\u5f88\u597d\u5730\u4e88\u4ee5\u89e3\u51b3\uff1a\u628a\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u5de5\u4f5c\u653e\u5728\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u628a\u6e05\u9664\u5de5\u4f5c\u653e\u5728\u6790\u6784\u51fd\u6570\u4e2d\u3002\u5f53\u5bf9\u8c61\u88ab\u521b\u5efa\u65f6\uff0c\u6784\u9020\u51fd\u6570\u88ab\u81ea\u52a8\u6267\u884c\u3002\u5f53\u5bf9\u8c61\u6d88\u4ea1\u65f6\uff0c\u6790\u6784\u51fd\u6570\u88ab\u81ea\u52a8\u6267\u884c\u3002\u8fd9\u4e0b\u5c31\u4e0d\u7528\u62c5\u5fc3\u5fd8\u4e86\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u548c\u6e05\u9664\u5de5\u4f5c\u3002<\/p>\n

\n\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570\u7684\u540d\u5b57\u4e0d\u80fd\u968f\u4fbf\u8d77\uff0c\u5fc5\u987b\u8ba9\u7f16\u8bd1\u5668\u8ba4\u5f97\u51fa\u624d\u53ef\u4ee5\u88ab\u81ea\u52a8\u6267\u884c\u3002Stroustrup\u7684\u547d\u540d\u65b9\u6cd5\u65e2\u7b80\u5355\u53c8\u5408\u7406\uff1a\u8ba9\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u4e0e\u7c7b\u540c\u540d\uff0c\u7531\u4e8e\u6790\u6784\u51fd\u6570\u7684\u76ee\u7684\u4e0e\u6784\u9020\u51fd\u6570\u7684\u76f8\u53cd\uff0c\u5c31\u52a0\u524d\u7f00\u2018~\u2019\u4ee5\u793a\u533a\u522b\u3002<\/p>\n

\n\u9664\u4e86\u540d\u5b57\u5916\uff0c\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570\u7684\u53e6\u4e00\u4e2a\u7279\u522b\u4e4b\u5904\u662f\u6ca1\u6709\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u8fd9\u4e0e\u8fd4\u56de\u503c\u7c7b\u578b\u4e3avoid\u7684\u51fd\u6570\u4e0d\u540c\u3002\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570\u7684\u4f7f\u547d\u975e\u5e38\u660e\u786e\uff0c\u5c31\u8c61\u51fa\u751f\u4e0e\u6b7b\u4ea1\uff0c\u5149\u6e9c\u6e9c\u5730\u6765\u5149\u6e9c\u6e9c\u5730\u53bb\u3002\u5982\u679c\u5b83\u4eec\u6709\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u90a3\u4e48\u7f16\u8bd1\u5668\u5c06\u4e0d\u77e5\u6240\u63aa\u3002\u4e3a\u4e86\u9632\u6b62\u8282\u5916\u751f\u679d\uff0c\u5e72\u8106\u89c4\u5b9a\u6ca1\u6709\u8fd4\u56de\u503c\u7c7b\u578b\u3002\uff08\u4ee5\u4e0a\u5178\u6545\u53c2\u8003\u4e86\u6587\u732e[Eekel,
\np55-p56]\uff09<\/p>\n

9.2 \u6784\u9020\u51fd\u6570\u7684\u521d\u59cb\u5316\u8868<\/font><\/strong><\/p>\n

\u6784\u9020\u51fd\u6570\u6709\u4e2a\u7279\u6b8a\u7684\u521d\u59cb\u5316\u65b9\u5f0f\u53eb\u201c\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u8868\u201d\uff08\u7b80\u79f0\u521d\u59cb\u5316\u8868\uff09\u3002\u521d\u59cb\u5316\u8868\u4f4d\u4e8e\u51fd\u6570\u53c2\u6570\u8868\u4e4b\u540e\uff0c\u5374\u5728\u51fd\u6570\u4f53 {}
\n\u4e4b\u524d\u3002\u8fd9\u8bf4\u660e\u8be5\u8868\u91cc\u7684\u521d\u59cb\u5316\u5de5\u4f5c\u53d1\u751f\u5728\u51fd\u6570\u4f53\u5185\u7684\u4efb\u4f55\u4ee3\u7801\u88ab\u6267\u884c\u4e4b\u524d\u3002<\/p>\n

\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u8868\u7684\u4f7f\u7528\u89c4\u5219\uff1a<\/p>\n

\u5982\u679c\u7c7b\u5b58\u5728\u7ee7\u627f\u5173\u7cfb\uff0c\u6d3e\u751f\u7c7b\u5fc5\u987b\u5728\u5176\u521d\u59cb\u5316\u8868\u91cc\u8c03\u7528\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n

\u4f8b\u5982<\/p>\n

\u00a0\u00a0\u00a0 class
\nA<\/p>\n

\u00a0\u00a0\u00a0 {\u2026<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nA(int
\nx);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ A\u7684\u6784\u9020\u51fd\u6570<\/p>\n

};\u00a0<\/p>\n

\u00a0\u00a0\u00a0 class B :
\npublic A<\/p>\n

\u00a0\u00a0\u00a0 {\u2026<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB(int x, int y);\/\/ B\u7684\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 };<\/p>\n

\u00a0\u00a0\u00a0 B::B(int
\nx, int y)<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0
\n:
\nA(x)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u5728\u521d\u59cb\u5316\u8868\u91cc\u8c03\u7528A\u7684\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0
\n\u2026<\/p>\n

}\u00a0\u00a0<\/p>\n

\u7c7b\u7684const\u5e38\u91cf\u53ea\u80fd\u5728\u521d\u59cb\u5316\u8868\u91cc\u88ab\u521d\u59cb\u5316\uff0c\u56e0\u4e3a\u5b83\u4e0d\u80fd\u5728\u51fd\u6570\u4f53\u5185\u7528\u8d4b\u503c\u7684\u65b9\u5f0f\u6765\u521d\u59cb\u5316\uff08\u53c2\u89c15.4\u8282\uff09\u3002<\/p>\n

\u7c7b\u7684\u6570\u636e\u6210\u5458\u7684\u521d\u59cb\u5316\u53ef\u4ee5\u91c7\u7528\u521d\u59cb\u5316\u8868\u6216\u51fd\u6570\u4f53\u5185\u8d4b\u503c\u4e24\u79cd\u65b9\u5f0f\uff0c\u8fd9\u4e24\u79cd\u65b9\u5f0f\u7684\u6548\u7387\u4e0d\u5b8c\u5168\u76f8\u540c\u3002<\/p>\n

\u975e\u5185\u90e8\u6570\u636e\u7c7b\u578b\u7684\u6210\u5458\u5bf9\u8c61\u5e94\u5f53\u91c7\u7528\u7b2c\u4e00\u79cd\u65b9\u5f0f\u521d\u59cb\u5316\uff0c\u4ee5\u83b7\u53d6\u66f4\u9ad8\u7684\u6548\u7387\u3002\u4f8b\u5982<\/p>\n

\u00a0\u00a0\u00a0 class
\nA<\/p>\n

{\u2026<\/p>\n

\u00a0\u00a0\u00a0
\nA(void);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 A(const A
\n&other);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

\u00a0\u00a0\u00a0 A
\n& operate =( const A
\n&other);\u00a0\u00a0\u00a0
\n\/\/ \u8d4b\u503c\u51fd\u6570<\/p>\n

}\uff1b<\/p>\n

\u00a0<\/p>\n

\u00a0\u00a0\u00a0 class
\nB<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0
\npublic:<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB(const A
\n&a);\u00a0\u00a0\u00a0
\n\/\/ B\u7684\u6784\u9020\u51fd\u6570<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0
\nprivate:\u00a0\u00a0\u00a0<\/p>\n

\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nA\u00a0
\nm_a;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\/\/ \u6210\u5458\u5bf9\u8c61<\/p>\n

};<\/p>\n

\u00a0<\/p>\n

\u793a\u4f8b9-2(a)\u4e2d\uff0c\u7c7bB\u7684\u6784\u9020\u51fd\u6570\u5728\u5176\u521d\u59cb\u5316\u8868\u91cc\u8c03\u7528\u4e86\u7c7bA\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff0c\u4ece\u800c\u5c06\u6210\u5458\u5bf9\u8c61m_a\u521d\u59cb\u5316\u3002<\/p>\n

\u793a\u4f8b9-2
\n(b)\u4e2d\uff0c\u7c7bB\u7684\u6784\u9020\u51fd\u6570\u5728\u51fd\u6570\u4f53\u5185\u7528\u8d4b\u503c\u7684\u65b9\u5f0f\u5c06\u6210\u5458\u5bf9\u8c61m_a\u521d\u59cb\u5316\u3002\u6211\u4eec\u770b\u5230\u7684\u53ea\u662f\u4e00\u6761\u8d4b\u503c\u8bed\u53e5\uff0c\u4f46\u5b9e\u9645\u4e0aB\u7684\u6784\u9020\u51fd\u6570\u5e72\u4e86\u4e24\u4ef6\u4e8b\uff1a\u5148\u6697\u5730\u91cc\u521b\u5efam_a\u5bf9\u8c61\uff08\u8c03\u7528\u4e86A\u7684\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570\uff09\uff0c\u518d\u8c03\u7528\u7c7bA\u7684\u8d4b\u503c\u51fd\u6570\uff0c\u5c06\u53c2\u6570a\u8d4b\u7ed9m_a\u3002<\/p>\n\n\n\n
\n

B::B(const A &a)<\/p>\n

: m_a(a)<\/p>\n

{<\/p>\n

\u2026<\/p>\n

}<\/p>\n<\/td>\n

\n

B::B(const A &a)<\/p>\n

{<\/p>\n

m_a = a;<\/p>\n

\u2026<\/p>\n

}<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u793a\u4f8b9-2(a) \u6210\u5458\u5bf9\u8c61\u5728\u521d\u59cb\u5316\u8868\u4e2d\u88ab\u521d\u59cb\u5316 \u793a\u4f8b9-2(b)
\n\u6210\u5458\u5bf9\u8c61\u5728\u51fd\u6570\u4f53\u5185\u88ab\u521d\u59cb\u5316<\/p>\n

\u00a0<\/p>\n

\u5bf9\u4e8e\u5185\u90e8\u6570\u636e\u7c7b\u578b\u7684\u6570\u636e\u6210\u5458\u800c\u8a00\uff0c\u4e24\u79cd\u521d\u59cb\u5316\u65b9\u5f0f\u7684\u6548\u7387\u51e0\u4e4e\u6ca1\u6709\u533a\u522b\uff0c\u4f46\u540e\u8005\u7684\u7a0b\u5e8f\u7248\u5f0f\u4f3c\u4e4e\u66f4\u6e05\u6670\u4e9b\u3002\u82e5\u7c7bF\u7684\u58f0\u660e\u5982\u4e0b\uff1a<\/p>\n

class F<\/p>\n

{<\/p>\n

public:<\/p>\n

F(int x, int y); \/\/ \u6784\u9020\u51fd\u6570<\/p>\n

private:<\/p>\n

int m_x, m_y;<\/p>\n

int m_i, m_j;<\/p>\n

}<\/p>\n

\u793a\u4f8b9-2(c)\u4e2dF\u7684\u6784\u9020\u51fd\u6570\u91c7\u7528\u4e86\u7b2c\u4e00\u79cd\u521d\u59cb\u5316\u65b9\u5f0f\uff0c\u793a\u4f8b9-2(d)\u4e2dF\u7684\u6784\u9020\u51fd\u6570\u91c7\u7528\u4e86\u7b2c\u4e8c\u79cd\u521d\u59cb\u5316\u65b9\u5f0f\u3002<\/p>\n\n\n\n
\n

F::F(int x, int y)<\/p>\n

: m_x(x), m_y(y)<\/p>\n

{<\/p>\n

m_i = 0;<\/p>\n

m_j = 0;<\/p>\n

}<\/p>\n<\/td>\n

\n

F::F(int x, int y)<\/p>\n

{<\/p>\n

m_x = x;<\/p>\n

m_y = y;<\/p>\n

m_i = 0;<\/p>\n

m_j = 0;<\/p>\n

}<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u793a\u4f8b9-2(c) \u6570\u636e\u6210\u5458\u5728\u521d\u59cb\u5316\u8868\u4e2d\u88ab\u521d\u59cb\u5316 \u793a\u4f8b9-2(d)
\n\u6570\u636e\u6210\u5458\u5728\u51fd\u6570\u4f53\u5185\u88ab\u521d\u59cb\u5316<\/p>\n

9.3 \u6784\u9020\u548c\u6790\u6784\u7684\u6b21\u5e8f<\/font><\/strong><\/p>\n

\n\u6784\u9020\u4ece\u7c7b\u5c42\u6b21\u7684\u6700\u6839\u5904\u5f00\u59cb\uff0c\u5728\u6bcf\u4e00\u5c42\u4e2d\uff0c\u9996\u5148\u8c03\u7528\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570\uff0c\u7136\u540e\u8c03\u7528\u6210\u5458\u5bf9\u8c61\u7684\u6784\u9020\u51fd\u6570\u3002\u6790\u6784\u5219\u4e25\u683c\u6309\u7167\u4e0e\u6784\u9020\u76f8\u53cd\u7684\u6b21\u5e8f\u6267\u884c\uff0c\u8be5\u6b21\u5e8f\u662f\u552f\u4e00\u7684\uff0c\u5426\u5219\u7f16\u8bd1\u5668\u5c06\u65e0\u6cd5\u81ea\u52a8\u6267\u884c\u6790\u6784\u8fc7\u7a0b\u3002<\/p>\n

\n\u4e00\u4e2a\u6709\u8da3\u7684\u73b0\u8c61\u662f\uff0c\u6210\u5458\u5bf9\u8c61\u521d\u59cb\u5316\u7684\u6b21\u5e8f\u5b8c\u5168\u4e0d\u53d7\u5b83\u4eec\u5728\u521d\u59cb\u5316\u8868\u4e2d\u6b21\u5e8f\u7684\u5f71\u54cd\uff0c\u53ea\u7531\u6210\u5458\u5bf9\u8c61\u5728\u7c7b\u4e2d\u58f0\u660e\u7684\u6b21\u5e8f\u51b3\u5b9a\u3002\u8fd9\u662f\u56e0\u4e3a\u7c7b\u7684\u58f0\u660e\u662f\u552f\u4e00\u7684\uff0c\u800c\u7c7b\u7684\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u6709\u591a\u4e2a\uff0c\u56e0\u6b64\u4f1a\u6709\u591a\u4e2a\u4e0d\u540c\u6b21\u5e8f\u7684\u521d\u59cb\u5316\u8868\u3002\u5982\u679c\u6210\u5458\u5bf9\u8c61\u6309\u7167\u521d\u59cb\u5316\u8868\u7684\u6b21\u5e8f\u8fdb\u884c\u6784\u9020\uff0c\u8fd9\u5c06\u5bfc\u81f4\u6790\u6784\u51fd\u6570\u65e0\u6cd5\u5f97\u5230\u552f\u4e00\u7684\u9006\u5e8f\u3002[Eckel,
\np260-261]<\/p>\n

9.4
\n\u793a\u4f8b\uff1a\u7c7bString\u7684\u6784\u9020\u51fd\u6570\u4e0e\u6790\u6784\u51fd\u6570<\/font><\/strong><\/p>\n

\/\/ String\u7684\u666e\u901a\u6784\u9020\u51fd\u6570<\/p>\n

String::String(const char *str)<\/p>\n

{<\/p>\n

if(str==NULL)<\/p>\n

{<\/p>\n

m_data = new char[1];<\/p>\n

*m_data = \u2018\u2019;<\/p>\n

}<\/p>\n

else<\/p>\n

{<\/p>\n

int length = strlen(str);<\/p>\n

m_data = new char[length+1];<\/p>\n

strcpy(m_data, str);<\/p>\n

}<\/p>\n

}<\/p>\n

\u00a0<\/p>\n

\/\/ String\u7684\u6790\u6784\u51fd\u6570<\/p>\n

String::~String(void)<\/p>\n

{<\/p>\n

delete [] m_data;<\/p>\n

\/\/ \u7531\u4e8em_data\u662f\u5185\u90e8\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u4ee5\u5199\u6210 delete m_data;<\/p>\n

}<\/p>\n

9.5 \u4e0d\u8981\u8f7b\u89c6\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u4e0e\u8d4b\u503c\u51fd\u6570<\/font><\/strong><\/p>\n

\n\u7531\u4e8e\u5e76\u975e\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u4f1a\u4f7f\u7528\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\uff0c\u7a0b\u5e8f\u5458\u53ef\u80fd\u5bf9\u8fd9\u4e24\u4e2a\u51fd\u6570\u6709\u4e9b\u8f7b\u89c6\u3002\u8bf7\u5148\u8bb0\u4f4f\u4ee5\u4e0b\u7684\u8b66\u544a\uff0c\u5728\u9605\u8bfb\u6b63\u6587\u65f6\u5c31\u4f1a\u591a\u5fc3\uff1a<\/p>\n

\n\u672c\u7ae0\u5f00\u5934\u8bb2\u8fc7\uff0c\u5982\u679c\u4e0d\u4e3b\u52a8\u7f16\u5199\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\uff0c\u7f16\u8bd1\u5668\u5c06\u4ee5\u201c\u4f4d\u62f7\u8d1d\u201d\u7684\u65b9\u5f0f\u81ea\u52a8\u751f\u6210\u7f3a\u7701\u7684\u51fd\u6570\u3002\u5018\u82e5\u7c7b\u4e2d\u542b\u6709\u6307\u9488\u53d8\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u7f3a\u7701\u7684\u51fd\u6570\u5c31\u9690\u542b\u4e86\u9519\u8bef\u3002\u4ee5\u7c7bString\u7684\u4e24\u4e2a\u5bf9\u8c61a,b\u4e3a\u4f8b\uff0c\u5047\u8bbea.m_data\u7684\u5185\u5bb9\u4e3a\u201chello\u201d\uff0cb.m_data\u7684\u5185\u5bb9\u4e3a\u201cworld\u201d\u3002<\/p>\n

\u73b0\u5c06a\u8d4b\u7ed9b\uff0c\u7f3a\u7701\u8d4b\u503c\u51fd\u6570\u7684\u201c\u4f4d\u62f7\u8d1d\u201d\u610f\u5473\u7740\u6267\u884cb.m_data =
\na.m_data\u3002\u8fd9\u5c06\u9020\u6210\u4e09\u4e2a\u9519\u8bef\uff1a\u4e00\u662fb.m_data\u539f\u6709\u7684\u5185\u5b58\u6ca1\u88ab\u91ca\u653e\uff0c\u9020\u6210\u5185\u5b58\u6cc4\u9732\uff1b\u4e8c\u662fb.m_data\u548ca.m_data\u6307\u5411\u540c\u4e00\u5757\u5185\u5b58\uff0ca\u6216b\u4efb\u4f55\u4e00\u65b9\u53d8\u52a8\u90fd\u4f1a\u5f71\u54cd\u53e6\u4e00\u65b9\uff1b\u4e09\u662f\u5728\u5bf9\u8c61\u88ab\u6790\u6784\u65f6\uff0cm_data\u88ab\u91ca\u653e\u4e86\u4e24\u6b21\u3002<\/p>\n

\u00a0<\/p>\n

\n\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\u975e\u5e38\u5bb9\u6613\u6df7\u6dc6\uff0c\u5e38\u5bfc\u81f4\u9519\u5199\u3001\u9519\u7528\u3002\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u662f\u5728\u5bf9\u8c61\u88ab\u521b\u5efa\u65f6\u8c03\u7528\u7684\uff0c\u800c\u8d4b\u503c\u51fd\u6570\u53ea\u80fd\u88ab\u5df2\u7ecf\u5b58\u5728\u4e86\u7684\u5bf9\u8c61\u8c03\u7528\u3002\u4ee5\u4e0b\u7a0b\u5e8f\u4e2d\uff0c\u7b2c\u4e09\u4e2a\u8bed\u53e5\u548c\u7b2c\u56db\u4e2a\u8bed\u53e5\u5f88\u76f8\u4f3c\uff0c\u4f60\u5206\u5f97\u6e05\u695a\u54ea\u4e2a\u8c03\u7528\u4e86\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff0c\u54ea\u4e2a\u8c03\u7528\u4e86\u8d4b\u503c\u51fd\u6570\u5417\uff1f<\/p>\n

String a(\u201chello\u201d);<\/p>\n

String b(\u201cworld\u201d);<\/p>\n

String c = a; \/\/ \u8c03\u7528\u4e86\u62f7\u8d1d\u6784\u9020\u51fd\u6570\uff0c\u6700\u597d\u5199\u6210 c(a);<\/p>\n

c = b; \/\/ \u8c03\u7528\u4e86\u8d4b\u503c\u51fd\u6570<\/p>\n

\u672c\u4f8b\u4e2d\u7b2c\u4e09\u4e2a\u8bed\u53e5\u7684\u98ce\u683c\u8f83\u5dee\uff0c\u5b9c\u6539\u5199\u6210String c(a) \u4ee5\u533a\u522b\u4e8e\u7b2c\u56db\u4e2a\u8bed\u53e5\u3002<\/p>\n

9.6
\n\u793a\u4f8b\uff1a\u7c7bString\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u4e0e\u8d4b\u503c\u51fd\u6570<\/font><\/strong><\/p>\n

\/\/ \u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

String::String(const String &other)<\/p>\n

{<\/p>\n

\/\/ \u5141\u8bb8\u64cd\u4f5cother\u7684\u79c1\u6709\u6210\u5458m_data<\/p>\n

int length = strlen(other.m_data);<\/p>\n

m_data = new char[length+1];<\/p>\n

strcpy(m_data, other.m_data);<\/p>\n

}<\/p>\n

\u00a0<\/p>\n

\/\/ \u8d4b\u503c\u51fd\u6570<\/p>\n

String & String::operate =(const String
\n&other)<\/p>\n

{<\/p>\n

\/\/ (1) \u68c0\u67e5\u81ea\u8d4b\u503c<\/p>\n

if(this == &other)<\/p>\n

return *this;<\/p>\n

\u00a0<\/p>\n

\/\/ (2) \u91ca\u653e\u539f\u6709\u7684\u5185\u5b58\u8d44\u6e90<\/p>\n

delete [] m_data;<\/p>\n

\u00a0<\/p>\n

\/\/ \uff083\uff09\u5206\u914d\u65b0\u7684\u5185\u5b58\u8d44\u6e90\uff0c\u5e76\u590d\u5236\u5185\u5bb9<\/p>\n

int length = strlen(other.m_data);<\/p>\n

m_data = new char[length+1];<\/p>\n

strcpy(m_data, other.m_data);<\/p>\n

\u00a0<\/p>\n

\/\/ \uff084\uff09\u8fd4\u56de\u672c\u5bf9\u8c61\u7684\u5f15\u7528<\/p>\n

return *this;<\/p>\n

}<\/p>\n

\u00a0<\/p>\n

\n\u7c7bString\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u4e0e\u666e\u901a\u6784\u9020\u51fd\u6570\uff08\u53c2\u89c19.4\u8282\uff09\u7684\u533a\u522b\u662f\uff1a\u5728\u51fd\u6570\u5165\u53e3\u5904\u65e0\u9700\u4e0eNULL\u8fdb\u884c\u6bd4\u8f83\uff0c\u8fd9\u662f\u56e0\u4e3a\u201c\u5f15\u7528\u201d\u4e0d\u53ef\u80fd\u662fNULL\uff0c\u800c\u201c\u6307\u9488\u201d\u53ef\u4ee5\u4e3aNULL\u3002<\/p>\n

\u7c7bString\u7684\u8d4b\u503c\u51fd\u6570\u6bd4\u6784\u9020\u51fd\u6570\u590d\u6742\u5f97\u591a\uff0c\u5206\u56db\u6b65\u5b9e\u73b0\uff1a<\/p>\n

\uff081\uff09\u7b2c\u4e00\u6b65\uff0c\u68c0\u67e5\u81ea\u8d4b\u503c\u3002\u4f60\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u591a\u6b64\u4e00\u4e3e\uff0c\u96be\u9053\u6709\u4eba\u4f1a\u611a\u8822\u5230\u5199\u51fa a = a
\n\u8fd9\u6837\u7684\u81ea\u8d4b\u503c\u8bed\u53e5\uff01\u7684\u786e\u4e0d\u4f1a\u3002\u4f46\u662f\u95f4\u63a5\u7684\u81ea\u8d4b\u503c\u4ecd\u6709\u53ef\u80fd\u51fa\u73b0\uff0c\u4f8b\u5982<\/p>\n\n\n\n
\n

\/\/ \u5185\u5bb9\u81ea\u8d4b\u503c<\/p>\n

b = a;<\/p>\n

\u2026<\/p>\n

c = b;<\/p>\n

\u2026<\/p>\n

a = c;<\/p>\n<\/td>\n

\n

\/\/ \u5730\u5740\u81ea\u8d4b\u503c<\/p>\n

b = &a;<\/p>\n

\u2026<\/p>\n

a = *b;<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e5f\u8bb8\u6709\u4eba\u4f1a\u8bf4\uff1a\u201c\u5373\u4f7f\u51fa\u73b0\u81ea\u8d4b\u503c\uff0c\u6211\u4e5f\u53ef\u4ee5\u4e0d\u7406\u776c\uff0c\u5927\u4e0d\u4e86\u5316\u70b9\u65f6\u95f4\u8ba9\u5bf9\u8c61\u590d\u5236\u81ea\u5df1\u800c\u5df2\uff0c\u53cd\u6b63\u4e0d\u4f1a\u51fa\u9519\uff01\u201d<\/p>\n

\n\u4ed6\u771f\u7684\u8bf4\u9519\u4e86\u3002\u770b\u770b\u7b2c\u4e8c\u6b65\u7684delete\uff0c\u81ea\u6740\u540e\u8fd8\u80fd\u590d\u5236\u81ea\u5df1\u5417\uff1f\u6240\u4ee5\uff0c\u5982\u679c\u53d1\u73b0\u81ea\u8d4b\u503c\uff0c\u5e94\u8be5\u9a6c\u4e0a\u7ec8\u6b62\u51fd\u6570\u3002\u6ce8\u610f\u4e0d\u8981\u5c06\u68c0\u67e5\u81ea\u8d4b\u503c\u7684if\u8bed\u53e5<\/p>\n

if(this == &other)<\/p>\n

\u9519\u5199\u6210\u4e3a<\/p>\n

if( *this == other)<\/p>\n

\uff082\uff09\u7b2c\u4e8c\u6b65\uff0c\u7528delete\u91ca\u653e\u539f\u6709\u7684\u5185\u5b58\u8d44\u6e90\u3002\u5982\u679c\u73b0\u5728\u4e0d\u91ca\u653e\uff0c\u4ee5\u540e\u5c31\u6ca1\u673a\u4f1a\u4e86\uff0c\u5c06\u9020\u6210\u5185\u5b58\u6cc4\u9732\u3002<\/p>\n

\n\uff083\uff09\u7b2c\u4e09\u6b65\uff0c\u5206\u914d\u65b0\u7684\u5185\u5b58\u8d44\u6e90\uff0c\u5e76\u590d\u5236\u5b57\u7b26\u4e32\u3002\u6ce8\u610f\u51fd\u6570strlen\u8fd4\u56de\u7684\u662f\u6709\u6548\u5b57\u7b26\u4e32\u957f\u5ea6\uff0c\u4e0d\u5305\u542b\u7ed3\u675f\u7b26\u2018\u2019\u3002\u51fd\u6570strcpy\u5219\u8fde\u2018\u2019\u4e00\u8d77\u590d\u5236\u3002<\/p>\n

\uff084\uff09\u7b2c\u56db\u6b65\uff0c\u8fd4\u56de\u672c\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u5b9e\u73b0\u8c61 a = b = c \u8fd9\u6837\u7684\u94fe\u5f0f\u8868\u8fbe\u3002\u6ce8\u610f\u4e0d\u8981\u5c06 return *this
\n\u9519\u5199\u6210 return this \u3002\u90a3\u4e48\u80fd\u5426\u5199\u6210return other \u5462\uff1f\u6548\u679c\u4e0d\u662f\u4e00\u6837\u5417\uff1f<\/p>\n

\u4e0d\u53ef\u4ee5\uff01\u56e0\u4e3a\u6211\u4eec\u4e0d\u77e5\u9053\u53c2\u6570other\u7684\u751f\u547d\u671f\u3002\u6709\u53ef\u80fdother\u662f\u4e2a\u4e34\u65f6\u5bf9\u8c61\uff0c\u5728\u8d4b\u503c\u7ed3\u675f\u540e\u5b83\u9a6c\u4e0a\u6d88\u5931\uff0c\u90a3\u4e48return
\nother\u8fd4\u56de\u7684\u5c06\u662f\u5783\u573e\u3002<\/p>\n

9.7
\n\u5077\u61d2\u7684\u529e\u6cd5\u5904\u7406\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u4e0e\u8d4b\u503c\u51fd\u6570<\/font><\/strong><\/p>\n

\u5982\u679c\u6211\u4eec\u5b9e\u5728\u4e0d\u60f3\u7f16\u5199\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\uff0c\u53c8\u4e0d\u5141\u8bb8\u522b\u4eba\u4f7f\u7528\u7f16\u8bd1\u5668\u751f\u6210\u7684\u7f3a\u7701\u51fd\u6570\uff0c\u600e\u4e48\u529e\uff1f<\/p>\n

\u5077\u61d2\u7684\u529e\u6cd5\u662f\uff1a\u53ea\u9700\u5c06\u62f7\u8d1d\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\u58f0\u660e\u4e3a\u79c1\u6709\u51fd\u6570\uff0c\u4e0d\u7528\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

class A<\/p>\n

{ \u2026<\/p>\n

private:<\/p>\n

A(const A &a); \/\/ \u79c1\u6709\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

A & operate =(const A &a); \/\/
\n\u79c1\u6709\u7684\u8d4b\u503c\u51fd\u6570<\/p>\n

};<\/p>\n

\u00a0<\/p>\n

\u5982\u679c\u6709\u4eba\u8bd5\u56fe\u7f16\u5199\u5982\u4e0b\u7a0b\u5e8f\uff1a<\/p>\n

A b(a); \/\/ \u8c03\u7528\u4e86\u79c1\u6709\u7684\u62f7\u8d1d\u6784\u9020\u51fd\u6570<\/p>\n

b = a; \/\/ \u8c03\u7528\u4e86\u79c1\u6709\u7684\u8d4b\u503c\u51fd\u6570<\/p>\n

\u7f16\u8bd1\u5668\u5c06\u6307\u51fa\u9519\u8bef\uff0c\u56e0\u4e3a\u5916\u754c\u4e0d\u53ef\u4ee5\u64cd\u4f5cA\u7684\u79c1\u6709\u51fd\u6570\u3002<\/p>\n

9.8 \u5982\u4f55\u5728\u6d3e\u751f\u7c7b\u4e2d\u5b9e\u73b0\u7c7b\u7684\u57fa\u672c\u51fd\u6570<\/font><\/strong><\/p>\n

\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u3001\u8d4b\u503c\u51fd\u6570\u90fd\u4e0d\u80fd\u88ab\u6d3e\u751f\u7c7b\u7ee7\u627f\u3002\u5982\u679c\u7c7b\u4e4b\u95f4\u5b58\u5728\u7ee7\u627f\u5173\u7cfb\uff0c\u5728\u7f16\u5199\u4e0a\u8ff0\u57fa\u672c\u51fd\u6570\u65f6\u5e94\u6ce8\u610f\u4ee5\u4e0b\u4e8b\u9879\uff1a<\/p>\n

u \u6d3e\u751f\u7c7b\u7684\u6784\u9020\u51fd\u6570\u5e94\u5728\u5176\u521d\u59cb\u5316\u8868\u91cc\u8c03\u7528\u57fa\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n

u \u57fa\u7c7b\u4e0e\u6d3e\u751f\u7c7b\u7684\u6790\u6784\u51fd\u6570\u5e94\u8be5\u4e3a\u865a\uff08\u5373\u52a0virtual\u5173\u952e\u5b57\uff09\u3002\u4f8b\u5982<\/p>\n

#include<\/p>\n

class Base<\/p>\n

{<\/p>\n

public:<\/p>\n

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

};<\/p>\n

\u00a0<\/p>\n

class Derived : public Base<\/p>\n

{<\/p>\n

public:<\/p>\n

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

};<\/p>\n

\u00a0<\/p>\n

void main(void)<\/p>\n

{<\/p>\n

Base * pB = new Derived; \/\/ upcast<\/p>\n

delete pB;<\/p>\n

}<\/p>\n

\u00a0<\/p>\n

\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n

~Derived<\/p>\n

~Base<\/p>\n

\u5982\u679c\u6790\u6784\u51fd\u6570\u4e0d\u4e3a\u865a\uff0c\u90a3\u4e48\u8f93\u51fa\u7ed3\u679c\u4e3a<\/p>\n

~Base<\/p>\n

\u00a0<\/p>\n

u \u5728\u7f16\u5199\u6d3e\u751f\u7c7b\u7684\u8d4b\u503c\u51fd\u6570\u65f6\uff0c\u6ce8\u610f\u4e0d\u8981\u5fd8\u8bb0\u5bf9\u57fa\u7c7b\u7684\u6570\u636e\u6210\u5458\u91cd\u65b0\u8d4b\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n

class Base<\/p>\n

{<\/p>\n

public:<\/p>\n

\u2026<\/p>\n

Base & operate =(const Base
\n&other); \/\/ \u7c7bBase\u7684\u8d4b\u503c\u51fd\u6570<\/p>\n

private:<\/p>\n

int m_i, m_j, m_k;<\/p>\n

};<\/p>\n

\u00a0<\/p>\n

class Derived : public Base<\/p>\n

{<\/p>\n

public:<\/p>\n

\u2026<\/p>\n

Derived & operate =(const Derived
\n&other); \/\/ \u7c7bDerived\u7684\u8d4b\u503c\u51fd\u6570<\/p>\n

private:<\/p>\n

int m_x, m_y, m_z;<\/p>\n

};<\/p>\n

\u00a0<\/p>\n

Derived & Derived::operate =(const Derived
\n&other)<\/p>\n

{<\/p>\n

\/\/\uff081\uff09\u68c0\u67e5\u81ea\u8d4b\u503c<\/p>\n

if(this == &other)<\/p>\n

return *this;<\/p>\n

\u00a0<\/p>\n

\/\/\uff082\uff09\u5bf9\u57fa\u7c7b\u7684\u6570\u636e\u6210\u5458\u91cd\u65b0\u8d4b\u503c<\/p>\n

Base::operate =(other); \/\/ \u56e0\u4e3a\u4e0d\u80fd\u76f4\u63a5\u64cd\u4f5c\u79c1\u6709\u6570\u636e\u6210\u5458<\/p>\n

\u00a0<\/p>\n

\/\/\uff083\uff09\u5bf9\u6d3e\u751f\u7c7b\u7684\u6570\u636e\u6210\u5458\u8d4b\u503c<\/p>\n

m_x = other.m_x;<\/p>\n

m_y = other.m_y;<\/p>\n

m_z = other.m_z;<\/p>\n

\u00a0<\/p>\n

\/\/\uff084\uff09\u8fd4\u56de\u672c\u5bf9\u8c61\u7684\u5f15\u7528<\/p>\n

return *this;<\/p>\n

}<\/p>\n

\u00a0<\/p>\n

9.9 \u4e00\u4e9b\u5fc3\u5f97\u4f53\u4f1a<\/font><\/strong><\/p>\n

\n\u6709\u4e9bC++\u7a0b\u5e8f\u8bbe\u8ba1\u4e66\u7c4d\u79f0\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u548c\u8d4b\u503c\u51fd\u6570\u662f\u7c7b\u7684\u201cBig-Three\u201d\uff0c\u5b83\u4eec\u7684\u786e\u662f\u4efb\u4f55\u7c7b\u6700\u91cd\u8981\u7684\u51fd\u6570\uff0c\u4e0d\u5bb9\u8f7b\u89c6\u3002<\/p>\n

\n\u4e5f\u8bb8\u4f60\u8ba4\u4e3a\u672c\u7ae0\u7684\u5185\u5bb9\u5df2\u7ecf\u591f\u591a\u4e86\uff0c\u5b66\u4f1a\u4e86\u5c31\u80fd\u5e73\u5b89\u65e0\u4e8b\uff0c\u6211\u4e0d\u80fd\u4f5c\u8fd9\u4e2a\u4fdd\u8bc1\u3002\u5982\u679c\u4f60\u5e0c\u671b\u5403\u900f\u201cBig-Three\u201d\uff0c\u8bf7\u597d\u597d\u9605\u8bfb\u53c2\u8003\u6587\u732e[Cline]
\n[Meyers] [Murry]\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u9ad8\u8d28\u91cfC++\u6559\u7a0b — \u7b2c9\u7ae0 \u7c7b\u7684\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u4e0e\u8d4b\u503c\u51fd\u6570 \u6765\u6e90:www.vcworld.net\u3000 \u6784\u9020 … \u7ee7\u7eed\u9605\u8bfb\u201c\u9ad8\u8d28\u91cfC++\u6559\u7a0b — \u7b2c9\u7ae0 \u7c7b\u7684\u6784\u9020\u51fd\u6570\u3001\u6790\u6784\u51fd\u6570\u4e0e\u8d4b\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[24,45,83,99,146],"class_list":["post-23","post","type-post","status-publish","format-standard","hentry","category-c","tag-c","tag-data","tag-it","tag-this","tag-146"],"_links":{"self":[{"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=\/wp\/v2\/posts\/23","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=23"}],"version-history":[{"count":0,"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=\/wp\/v2\/posts\/23\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.keyboardmeow.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}