{"id":1705,"date":"2012-06-24T21:13:27","date_gmt":"2012-06-24T13:13:27","guid":{"rendered":"http:\/\/kuki.idv.tw\/?p=1705"},"modified":"2012-06-24T21:13:27","modified_gmt":"2012-06-24T13:13:27","slug":"overloading%e8%88%87overriding%e7%9a%84%e5%b7%ae%e7%95%b0","status":"publish","type":"post","link":"https:\/\/www.kuki.idv.tw\/?p=1705","title":{"rendered":"Overloading\u8207Overriding\u7684\u5dee\u7570"},"content":{"rendered":"

\u5728\u7a0b\u5f0f\u8a2d\u8a08\u7576\u4e2d\u5e38\u6703\u807d\u5230\u9019\u5169\u500b\u8a5e\u5f59\uff1a\u300eOverloading\u300f\u3001\u300eOverriding\u300f\u3002\u4f46\u4e5f\u767c\u73fe\u597d\u50cf\u6709\u4e00\u4e9bprogrammer\u5c0d\u6b64\u5169\u7684\u540d\u8a5e\u4e0d\u592a\u6e05\u695a\uff0c\u6240\u4ee5\u4e0b\u9762\u6703\u52a0\u4ee5\u8aaa\u660e\uff0c\u63d0\u4f9b\u5927\u5bb6\u53c3\u8003\u3002\u53e6\u5916\uff0c\u5b9a\u7fa9\u53ea\u662f\u521d\u6b65\u7684\u8a8d\u77e5\u800c\u5df2\uff0c\u6211\u4e0d\u7ba1\u5728\u4e0a\u8ab2\u6216\u5de5\u4f5c\u4e0a\u90fd\u4e0d\u65b7\u5f37\u8abf\u8acb\u641e\u6e05\u695aWhy\u7684\u5c64\u6b21\uff0c\u5728\u6b64\u4e5f\u6703\u76e1\u53ef\u80fd\u7c21\u55ae\u7684\u8aaa\u660e\u4e00\u4e0b\uff01<\/strong><\/p>\n

 <\/p>\n

Overloading<\/strong>\uff01\u7c21\u5316\u51fd\u5f0f\u547d\u540d\u7684\u6700\u4f73\u5e6b\u624b\u3002<\/strong>\u5982\u679c\u8981\u5f9e\u5b9a\u7fa9\u9762\u4f86\u770b\u4ec0\u9ebc\u53eb\u505aOverloading\uff0c\u5176\u5b9a\u7fa9\u5982\u4e0b\uff1a\u300e\u85c9\u7531\u63a5\u6536\u7684\u53c3\u6578\u4e32\u5217\u4e4b\u578b\u614b\u6216\u6578\u91cf\u4e4b\u4e0d\u540c\uff0c\u4ee5\u6c42\u9054\u5230\u591a\u500b\u51fd\u5f0f\u53ef\u5171\u7528\u76f8\u540c\u51fd\u5f0f\u540d\u7a31\u8b02\u4e4b\u300f\u3002\u8b1b\u767d\u8a71\u4e00\u9ede\u5c31\u662f\u660e\u660e\u6709\u5f88\u591a\u500b\u51fd\u5f0f\uff0c\u4f46\u51fd\u5f0f\u540d\u7a31\u537b\u80fd\u4e00\u6a23\uff0c\u800c\u7cfb\u7d71\u5982\u4f55\u5224\u65b7\u9019\u4e9b\u6709\u76f8\u540c\u540d\u7a31\u7684\u51fd\u5f0f\u8a72\u547c\u53eb\u8ab0\u5462\uff0c\u4e3b\u8981\u5c31\u662f\u7528<\/strong>parameter list<\/strong>\u50b3\u5165\u7684\u6578\u91cf\u8ddf\u578b\u5225\u4e0d\u540c\u800c\u5b9a\u3002<\/strong>\u4ee5\u4e0b\u5217\u4f8b\u5b50\u800c\u8a00\uff1a<\/p>\n

void print(int i) {\u2026}<\/p>\n

void print(double d) {\u2026}<\/p>\n

void print(char c) {…}<\/p>\n

\u9019\u4e09\u8005\u90fd\u53eb\u505aprint\uff0c\u4f46\u7531\u65bc\u53c3\u6578\u4e32\u5217\u7684\u578b\u614b\u4e0d\u540c\u6240\u4ee5\u7cfb\u7d71\u53ef\u4ee5\u81ea\u52d5\u5340\u5225\u51fa\uff0c\u7576\u4e0d\u540c\u578b\u5225\u9032\u4f86\u6642\u5404\u81ea\u8981\u547c\u53eb\u54ea\u4e00\u500b\u51fd\u5f0f\u3002\u6240\u4ee5\u5c0duser\u800c\u8a00\uff0c\u4e0d\u7ba1\u8981\u5370\u51fa\u6574\u6578\u3001\u6d6e\u9ede\u6578\u8ddf\u5b57\u5143\uff0c\u6240\u9700\u505a\u7684\u52d5\u4f5c\u90fd\u4e00\u6a23\uff0c\u4f8b\u5982\uff1aprint(100)\u3001print(3.5)\u3001print(\u2018a\u2019)… see, it\u2019s more easy to use and memorize\u3002<\/p>\n

 <\/p>\n

\u5728<\/strong>C++<\/strong>\u4e2d<\/strong>Overloading<\/strong>\u5176\u5be6\u53c8\u53ef\u4ee5\u7d30\u5206\u70ba<\/strong>function overloading<\/strong>\u8ddf<\/strong>operator overloading<\/strong>\u3002<\/strong>\u5176\u4e2d\uff0cfunction overloading\u5c31\u662f\u4e0a\u8ff0\u5927\u5bb6\u5ee3\u70ba\u7a31\u547c\u7684overloading\uff1b\u800c\u53e6\u4e00\u7a2e\u53eb\u505aoperator overloading<\/strong>\u5176\u6982\u5ff5\u662f\uff1a\u4e0d\u540c\u904b\u7b97\u5f0f\u85c9\u7531\u63a5\u6536\u7684\u904b\u7b97\u5b50\u578b\u614b\u4e0d\u540c\u4f86\u9054\u5230\u5171\u7528\u76f8\u540c\u7684\u904b\u7b97\u5b50\u7b26\u865f<\/strong>\uff0c\u8209\u4f8b\u4f86\u8aaa\uff1a3+5\u30012.3+5.5…\u9019\u7a2e\u6574\u6578\u76f8\u52a0\u8ddf\u6d6e\u9ede\u6578\u76f8\u52a0\u6839\u672c\u5c31\u622a\u7136\u4e0d\u540c\uff0c\u4f46\u5c0d\u5916\u90e8\u4f7f\u7528\u8005\u800c\u8a00\u7528\u6cd5\u90fd\u76f8\u901a\u53ea\u8981\u8a18\u5f97\u5229\u7528\u00a0\u300e+\u300f\u9019\u500b\u7b26\u865f\u5373\u53ef\u5c07\u5169\u500b\u904b\u7b97\u5143\u76f8\u52a0\uff0c\u800c\u6838\u5fc3\u7684\u6703\u81ea\u5df1\u7531\u7cfb\u7d71\u4f9d\u64da\u904b\u7b97\u5b50\u7684\u578b\u5225\u53bb\u9a45\u52d5\u4e0d\u4e00\u6a23\u7684\u904b\u7b97\u00a0\u3002<\/p>\n

 <\/p>\n

overloading<\/strong>\u4e3b\u8981\u7684\u51fa\u767c\u9ede\uff0c\u5176\u5be6\u662f\u8981\u7d66\u4e88\u4f7f\u7528\u8005\u8ddf\u8cbc\u5fc3\u7684\u670d\u52d9\u3002<\/strong>\u7576\u6e05\u695aoverloading\u7684\u5b9a\u7fa9\u4e4b\u5f8c\uff0c\u8981\u53bb\u7d30\u60f3\u70ba\u4ec0\u9ebc\u7576\u521d\u6703\u6709overloading\u9019\u6a23\u7684\u6982\u5ff5\u51fa\u73fe\uff0c\u8a66\u60f3\u5982\u679c\u6709<\/strong>20<\/strong>\u7a2e\u578b\u5225\uff0c\u6bcf\u7a2e\u90fd\u8981\u652f\u63f4<\/strong>print<\/strong>\u7684\u65b9\u6cd5\uff0c\u82e5\u6c92\u6709<\/strong>overloading<\/strong>\u90a3\u4f7f\u7528\u8005\u9700\u8981\u81ea\u5df1\u8a18\u4f4f\u6216\u5e38\u5e38\u53bb\u67e5<\/strong>api document<\/strong>\uff0c\u5de5\u4f5c\u7684\u6548\u7387\u81ea\u7136\u5c31\u964d\u4f4e\uff0c\u82e5\u80fd\u63a1\u7528<\/strong>overloading<\/strong>\u5247<\/strong>user<\/strong>\u53ea\u9700\u8981\u8a18\u4f4f\u547c\u53eb<\/strong>print(<\/strong>\u53c3\u6578<\/strong>)<\/strong>\uff0c\u4e4b\u5f8c\u7cfb\u7d71\u6703\u81ea\u52d5\u5340\u5206\u3002<\/strong>\u6240\u4ee5\u82e5\u8981\u8aaaoverloading\u7684\u51fa\u767c\u9ede\uff0c\u5176\u76ee\u7684\u5927\u6982\u5c31\u662f\u4e0b\u5217\u5169\u9805\uff1a<\/p>\n

l\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u964d\u4f4e\u6240\u9700\u547d\u540d\u7684\u51fd\u5f0f\u540d\u7a31\u3002<\/strong><\/strong><\/p>\n

l\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u63d0\u9ad8<\/strong>user<\/strong>\u7684\u6613\u7528\u6027<\/strong><\/strong><\/p>\n

 <\/p>\n

Overriding<\/strong>\uff01\u5f8c\u4ee3\u4e0d\u60f3\u9075\u5faa\u53e4\u79ae\u7684\u8a2d\u8a08\u624b\u6cd5\u3002<\/strong>\u5f9e\u5b9a\u7fa9\u9762\u4f86\u770b\uff0c\u6240\u8b02Overriding<\/strong>\u662f\u6307\uff1a\u300e\u5b50\u985e\u5225\u5c07\u7236\u985e\u5225\u51fd\u5f0f\u91cd\u65b0\u5b9a\u7fa9\u4ee5\u7b26\u5408\u81ea\u8eab\u6240\u9700\u300f\u3002<\/strong>\u6211\u5e38\u7528\u4e00\u500b\u6dfa\u986f\u7684\u4f8b\u5b50\u4f86\u8aaa\u660e\uff0c\u4eca\u5929\u6709\u4e00\u500b\u7236\u985e\u5225\uff1aPerson\u3001\u4e00\u500b\u5b50\u985e\u5225\uff1aSuperman\uff0c\u5f88\u5bb9\u6613\u770b\u5f97\u51fa\u4f86Superman\u4e5f\u662fPerson\u7684\u4e00\u7a2e\uff0c\u6545Superman\u70ba\u4e86\u6e1b\u5c11\u91cd\u8907\u958b\u767c\u5c07\u76f4\u63a5\u7e7c\u627f\u7236\u985e\u5225\u7684\u5c6c\u6027\u8ddf\u904b\u4f5c\u3002\u4f46\u8a66\u60f3\u4eca\u5929\u82e5<\/strong>Person<\/strong>\u4e2d\u6709\u4e00\u500b\u904b\u4f5c\u53eb\u505aiam()<\/strong>\u88e1\u9762\u5b9a\u7fa9\u4e86\u5370\u51faPerson<\/strong>\u7684\u52d5\u4f5c\uff0c\u6b64\u6642\u82e5Superman<\/strong>\u7e7c\u627f\u4ed6\u7684\u6642\u5f8c\uff0ciam()<\/strong>\u4e5f\u6703\u88ab\u7e7c\u627f\u4e0b\u53bb\uff0c\u5982\u6b64\u7576\u5225\u4eba\u547c\u53ebSuperman<\/strong>\u7684iam()<\/strong>\u6642\u4e5f\u6703\u5370\u51faPerson<\/strong>\u3002\u8a66\u60f3\u82e5\u4f60\u662f\u8d85\u4eba\u4f60\u6703\u5e0c\u671b\u53ea\u5370\u51faPerson<\/strong>\u55ce\uff0c\u61c9\u8a72\u5f88\u4e0d\u7518\u5fc3\u5427\uff0c\u597d\u4e0d\u5bb9\u6613\u6210\u70ba\u8d85\u4eba\uff0c\u7576\u7136\u5e0c\u671b\u80fd\u5927\u8072\u8aaa\u51fa\u201di am superman!!\u201d<\/strong>\u56c9(<\/strong>\u54c8)<\/strong>\uff5e\uff5e\u6211\u5011\u7528\u4e0b\u9762\u4f86\u8aaa\u660eoverriding\u7684\u4f8b\u5b50\uff1a<\/p>\n

class Person {<\/p>\n

public void iam()<\/p>\n

{System.out.println(\u201cI am a person.\u201d);}<\/p>\n

}<\/p>\n

 <\/p>\n

class Superman extends Person {<\/p>\n

public void iam()<\/p>\n

{System.out.println(\u201cI am a Superman.\u201d);}<\/p>\n

}<\/p>\n

 <\/p>\n

Overriding<\/strong>\u6700\u7d42\u7684\u76ee\u7684\uff0c\u7576\u7136\u662f\u5e0c\u671b\u5229\u7528\u7236\u985e\u5225\u4f86\u52d5\u614b\u64cd\u4f5c\u5b50\u985e\u5225\u7684\u51fd\u5f0f\uff0c\u4ee5\u9054\u591a\u578b\u7684\u6548\u679c\u3002<\/strong>\u6211\u5e38\u9019\u6a23\u5f62\u5bb9\uff0c\u7576\u770b\u5230\u4e86<\/strong>inheritance<\/strong>\u3001overriding<\/strong>\u8ddfupcasting(<\/strong>\u5411\u4e0a\u8f49\u578b\uff1a\u6307\u7684\u662f\u5c07\u5b50\u985e\u5225\u7269\u4ef6\u8f49\u6210\u7236\u985e\u5225\u578b\u614b)<\/strong>\u7684\u6642\u5019\u4ee3\u8868\u4e86\u7a0b\u5f0f\u6e96\u5099\u8981\u505a\u591a\u578b\u4e86<\/strong>\uff0c\u800c\u591a\u578b\u7684\u76ee\u7684\u7576\u7136\u5c31\u662f\u8981\u589e\u52a0\u7a0b\u5f0f\u7684\u5f48\u6027\uff0c\u8b93\u76f8\u540c\u7684\u51fd\u5f0f\u540d\u7a31\u5728\u52d5\u614b\u7684\u968e\u6bb5\u624d\u6c7a\u5b9a\u8981\u547c\u53eb\u54ea\u4e00\u500b\u51fd\u5f0f\uff0c\u6545\u53ef\u9054\u5230\u540c\u540d\u7570\u5f0f\u7684\u6548\u679c\u3002<\/p>\n

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

Overloding<\/strong>\u6ce8\u91cd\u7684\u662f\u4e0d\u540c\u5f0f\u5b50\u5171\u7528\u76f8\u540c\u7684\u51fd\u5f0f\u540d\u7a31\u3002\u800c<\/strong>Overriding<\/strong>\u5f8c\u7684\u591a\u578b\u91cd\u8996\u7684\u662f\u76f8\u540c\u7684\u51fd\u5f0f\u5728\u4e0d\u540c\u7684\u985e\u5225\u4e2d\u6703\u6709\u4e0d\u540c\u7684\u51fd\u5f0f\u540d\u7a31\u6703\u6709\u4e0d\u540c\u7684\u884c\u70ba\u53cd\u61c9\uff0c\u4e26\u4e14\u5728<\/strong>runtime<\/strong>\u624d\u6c7a\u5b9a\u6240\u9700\u547c\u53eb\u7684\u884c\u70ba\u53cd\u61c9\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728\u7a0b\u5f0f\u8a2d\u8a08\u7576\u4e2d\u5e38\u6703\u807d\u5230\u9019\u5169\u500b\u8a5e\u5f59\uff1a\u300eOverloading\u300f\u3001\u300eOverriding\u300f\u3002\u4f46\u4e5f\u767c\u73fe\u597d\u50cf\u6709\u4e00\u4e9bpr … \u95b1\u8b80\u5168\u6587\u3008Overloading\u8207Overriding\u7684\u5dee\u7570\u3009<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1705"}],"collection":[{"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1705"}],"version-history":[{"count":2,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1705\/revisions"}],"predecessor-version":[{"id":1707,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1705\/revisions\/1707"}],"wp:attachment":[{"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kuki.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}