C++鐨勮櫄缁ф壙 - 宸茶В鍐?- 鎼滄悳闂棶

C++鐨勮櫄缁ф壙鍦ㄤ粈涔堟儏鍐典笅浣跨敤

答案：浠庢剰涔変笂鏉ョ湅锛屼竴涓猄leeperSofa娌℃湁娌欏彂鍜屽簥涓ょ閲嶉噺锛?濡傛鐨勭户鎵夸笉鏄湡瀹炵殑鐜板疄涓栫晫鎻忚堪銆傝繘涓€姝ュ垎鏋愬彲寰楋紝搴婂拰娌欏彂閮芥槸瀹跺叿鐨勪竴绉嶏紝鍑″鍏烽兘鏈夐噸閲忥紝鎵€浠ラ€氳繃鍒嗚В鏉ヨ€冨療鍏跺叧绯伙紝濡傚浘17鈥?鎵€绀恒€?


鍥?7-2 搴婂拰娌欏彂鐨勫垎瑙?銆€銆€銆€銆€//**********************
銆€銆€銆€銆€//** 銆€銆€ch17_2.cpp 銆€**
銆€銆€銆€銆€//**********************

銆€銆€銆€銆€#include<iostream.h>

銆€銆€銆€銆€class Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Furniture(){}
銆€銆€銆€銆€銆€銆€void SetWeight(int i){ weight =i; }
銆€銆€銆€銆€銆€銆€int GetWeight(){ return weight; }
銆€銆€銆€銆€銆€protected:
銆€銆€銆€銆€銆€銆€int weight;
銆€銆€銆€銆€};

銆€銆€銆€銆€class Bed :public Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Bed(){}
銆€銆€銆€銆€銆€銆€void Sleep(){ cout <<"Sleeping...\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€class Sofa :public Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Sofa(){}
銆€銆€銆€銆€銆€銆€void WatchTV(){ cout <<"Watching TV.\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€class SleeperSofa :public Bed, public Sofa
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€SleeperSofa() :Sofa(), Bed(){}
銆€銆€銆€銆€銆€銆€void FoldOut(){ cout <<"Fold out the sofa.\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€void main()
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€SleeperSofa ss;
銆€銆€銆€銆€銆€ss.SetWeight(20); //缂栬瘧鍑洪敊锛佹ā绯婄殑SetWeight鎴愬憳
銆€銆€銆€銆€銆€Furniture* pF;
銆€銆€銆€銆€銆€pF =(Furniture*)&ss; //缂栬瘧鍑洪敊锛佹ā绯婄殑Furniture*
銆€銆€銆€銆€銆€cout <<pF->GetWeight() <<endl;
銆€銆€銆€銆€}鍥犱负SleeperSofa涓嶆槸鐩存帴缁ф壙Furniture锛岃€屾槸Bed鍜孲ofa鍚勮嚜缁ф壙Furniture锛屾墍浠ュ畬鏁寸殑SleeperSofa瀵硅薄鍐呭瓨甯冨眬濡傚浘17-3鎵€绀恒€?br>
鍥?7-3 瀹屾暣SleeperSofa瀵硅薄鍐呭瓨甯冨眬

杩欓噷涓€涓猄leepersofa鍖呮嫭涓€涓畬鏁寸殑Bed锛岄殢鍚庤繕鏈変竴涓畬鏁寸殑Sofa锛屽悗闈㈣繕鏈変竴涓?Sleepersofa鐗规湁鐨勪笢瑗裤€係leeperSofa涓殑姣忎竴涓瓙瀵硅薄閮芥湁瀹冭嚜宸辩殑Furniture閮ㄥ垎銆傚洜涓烘瘡涓瓙瀵硅薄缁ф壙Furniture锛屾墍浠ヤ竴涓猄leeperSofa鍖呭惈涓や釜Furniture瀵硅薄锛屽疄闄呬笂鐨勭户鎵垮眰娆″鍥?7鈥?鎵€绀恒€?br>

鍥?7-4 SleeperSofa鐨勫疄闄呯户鎵垮叧绯?br>
銆€銆€缂栬瘧chl7鈥?锛巆pp鏃讹紝涓嶇煡閬揝etWeight()灞炰簬鍝竴涓狥urniture鎴愬憳锛屾寚鍚慒urniture鐨勬寚閽堜篃涓嶇煡閬撶┒绔熸寚鍝竴涓狥urniture銆傝繖灏辨槸涓轰粈涔坈hl7_2.cpp缂栬瘧閫氫笉杩囩殑鍘熷洜銆?br>銆€銆€SleeperSofa鍙渶涓€涓狥umiture锛屾墍浠ユ垜浠笇鏈涘畠鍙惈涓€涓狥urniture鎷疯礉锛屽悓鏃跺張瑕佸叡浜獴ed鍜孲ofa鐨勬垚鍛樺嚱鏁颁笌鏁版嵁鎴愬憳锛孋++瀹炵幇杩欑缁ф壙缁撴瀯鐨勬柟娉曠О涓鸿櫄鎷熺户鎵?virtual inheritance)銆?br>銆€銆€涓嬮潰鏄櫄鎷熺户鎵跨殑浠ｇ爜锛?銆€銆€銆€銆€//**********************
銆€銆€銆€銆€//** 銆€銆€ch17_3.cpp 銆€**
銆€銆€銆€銆€//**********************

銆€銆€銆€銆€#include<iostream.h>

銆€銆€銆€銆€class Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Furniture(){}
銆€銆€銆€銆€銆€銆€void SetWeight(int i){ weight =i; }
銆€銆€銆€銆€銆€銆€int GetWeight(){ return weight; }
銆€銆€銆€銆€銆€protected:
銆€銆€銆€銆€銆€銆€int weight;
銆€銆€銆€銆€};

銆€銆€銆€銆€class Bed :virtual public Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Bed(){}
銆€銆€銆€銆€銆€銆€void Sleep(){ cout <<"Sleeping...\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€class Sofa :virtual public Furniture
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€Sofa(){}
銆€銆€銆€銆€銆€銆€void WatchTV(){ cout <<"Watching TV.\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€class SleeperSofa :public Bed, public Sofa
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€public:
銆€銆€銆€銆€銆€銆€SleeperSofa() :Sofa(), Bed(){}
銆€銆€銆€銆€銆€銆€void FoldOut(){ cout <<"Fold out the sofa.\\n"; }
銆€銆€銆€銆€};

銆€銆€銆€銆€void main()
銆€銆€銆€銆€{
銆€銆€銆€銆€銆€SleeperSofa ss;
銆€銆€銆€銆€銆€ss.SetWeight(20);
銆€銆€銆€銆€銆€cout <<ss.GetWeight() <<endl;
銆€銆€銆€銆€}銆€杩愯缁撴灉涓猴細
銆€銆€銆€銆€20
銆€銆€鍦˙ed鍜孲ofa缁ф壙Furniture涓姞涓妚irtual鍏抽敭瀛楋紝杩欑浉褰撲簬璇达紝 鈥滃鏋滆繕娌℃湁Furniture绫伙紝鍒欏姞鍏ヤ竴涓狥urniture鎷疯礉锛屽惁鍒欏氨鐢ㄦ湁鐨勯偅涓€涓€濄€傛鏃朵竴涓猄leepersofa鍦ㄥ唴瀛樹腑鐨勫竷灞€瑙佸浘17-5銆?br>

鍥?7-5 铏氭嫙缁ф壙鐨凷leepeiSofa鍐呭瓨甯冨眬

鍦ㄨ櫄鎷熺户鎵跨殑鎯呭喌涓嬶紝搴旂敤绋嬪簭main()涓紩鐢℅etWeight()涓嶅啀妯＄硦锛屾垜浠緱鍒颁簡鐪熸鐨勫浘17-2鎵€绀虹殑缁ф壙鍏崇郴銆?br>銆€銆€->铏氭嫙缁ф壙鐨勮櫄鎷熷拰铏氭嫙鍑芥暟鐨勮櫄鎷熸病鏈変换浣曞叧绯汇€?铏氭嫙缁ф壙鍦ㄤ竴鑸殑搴旂敤涓緢灏戠敤鍒帮紝鎵€浠ヤ篃寰€寰€琚拷瑙嗭紝杩欎篃涓昏鏄洜涓哄湪C++涓紝澶氶噸缁ф壙鏄笉鎺ㄨ崘鐨勶紝涔熷苟涓嶅父鐢紝鑰屼竴鏃︾寮€浜嗗閲嶇户鎵匡紝铏氭嫙缁ф壙灏卞畬鍏ㄥけ鍘讳簡瀛樺湪鐨勫繀瑕侊紙鍥犱负杩欐牱鍙細闄嶄綆鏁堢巼鍜屽崰鐢ㄦ洿澶氱殑绌洪棿锛屽叧浜庤繖涓€鐐癸紝鎴戣嚜宸辫繕娌℃湁澶娣卞埢鐨勭悊瑙ｏ紝鏈夊叴瓒ｇ殑鍙互鐪嬬綉缁滀笂鐧芥潹鐨勪綔鍝併€奟TTI銆佽櫄鍑芥暟鍜岃櫄鍩虹被鐨勫紑閿€鍒嗘瀽鍙婁娇鐢ㄦ寚瀵笺€嬶紝璇村疄璇濇垜鐩墠杩樻病鐪嬪緱寰堟槑鐧斤紝楂樹汉鍙互鎸囩偣涓嬫垜锛夈€?br>鍙﹀鍏充簬鍏舵湰璐ㄧ殑鎺㈣锛屽彲浠ュ弬鑰?http://www.cppblog.com/chemz/archive/2007/06/12/26135.html

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