锘?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 嫻呰皥 C++ 涓殑 new/delete 鍜?new[]/delete[]-嫻庡崡杞歡寮�鍙憒灞變笢杞歡寮�鍙?嫻庡崡璧㈠痙縐戞妧杞歡寮�鍙戝叕鍙?/title> <meta name="keywords" content="嫻呰皥 C++ 涓殑 new/delete 鍜?new[]/delete[]"/> <meta name="description" content="鍦–++涓紝浣犱篃璁哥粡甯鎬嬌鐢╪ew鍜宒elete鏉ュ姩鎬佺敵璇峰拰閲婃斁鍐呭瓨錛屼絾浣犲彲鏇炬兂榪囦互涓嬮棶棰樺憿錛焠ew鍜宒elete鏄嚱鏁板悧錛焠ew鍙堟槸浠�涔堬紵浠�涔堟椂鍊欑敤瀹冧滑錛熶綘鐭ラ亾operatornew鍜宱peratordelete鍚楋紵涓轟粈涔坣ew(size_t);  //allocateanarrayvoi"/> <link href="/css/style.css" rel="stylesheet" type="text/css" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <div style="position:fixed;left:-9000px;top:-9000px;"><dfn id="orz4q"><noscript id="orz4q"><xmp id="orz4q"><output id="orz4q"></output></xmp></noscript></dfn><strong id="orz4q"><dl id="orz4q"></dl></strong><ol id="orz4q"><p id="orz4q"><nav id="orz4q"><pre id="orz4q"></pre></nav></p></ol><dfn 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<a href="/News/">鏂伴椈鍔ㄦ�?/a> >> <a href="/News/Industry/">杞歡寮�鍙戣涓氳祫璁?/a> >> 嫻忚鏂囩珷</div></div> <div class="youshi_f1" id="youshi_tdyx"> <div class="youshi01"> <h1 class="article_title">嫻呰皥 C++ 涓殑 new/delete 鍜?new[]/delete[]</h1> <div class="article_author">娣誨姞鏃墮棿錛?016-11-8 15:21:50 鏂囩珷浣滆�咃細<a href="/">嫻庡崡杞歡寮�鍙?/a> 嫻忚嬈℃暟錛?Script Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=2920"></Script></div> <div class="article_main"><div id="MyContent"><p><span style="font-size: 14px;">銆�銆�鍦?C++ 涓紝浣犱篃璁哥粡甯鎬嬌鐢?new 鍜?delete 鏉ュ姩鎬佺敵璇峰拰閲婃斁鍐呭瓨錛屼絾浣犲彲鏇炬兂榪囦互涓嬮棶棰樺憿錛?/span></p><p><span style="font-size: 14px;">銆�銆�new 鍜?delete 鏄嚱鏁板悧錛?/span></p><p><span style="font-size: 14px;">銆�銆�new [] 鍜?delete [] 鍙堟槸浠�涔堬紵浠�涔堟椂鍊欑敤瀹冧滑錛?/span></p><p><span style="font-size: 14px;">銆�銆�浣犵煡閬?operator new 鍜?operator delete 鍚楋紵</span></p><p><span style="font-size: 14px;">銆�銆�涓轟粈涔?new [] 鍑烘潵鐨勬暟緇勬湁鏃跺彲浠ョ敤 delete 閲婃斁鏈夋椂鍙堜笉琛岋紵</span></p><p><span style="font-size: 14px;">銆�銆�鈥?/span></p><p><span style="font-size: 14px;">銆�銆�濡傛灉浣犲榪欎簺闂閮芥湁鐤戦棶鐨勮瘽錛屼笉濡ㄧ湅鐪嬫垜榪欑瘒鏂囩珷銆?/span></p><p><span style="font-size: 14px;">銆�銆�new 鍜?delete 鍒板簳鏄粈涔堬紵</span></p><p><span style="font-size: 14px;">銆�銆�濡傛灉鎵懼伐浣滅殑鍚屽鐪嬩竴浜涢潰璇曠殑涔︼紝鎴戠浉淇￠兘浼氶亣鍒拌繖鏍風殑棰橈細sizeof 涓嶆槸鍑芥暟錛岀劧鍚庝婦鍑轟竴鍫嗙殑鐞嗙敱鏉ヨ瘉鏄?sizeof 涓嶆槸鍑芥暟銆傚湪榪欓噷錛屽拰 sizeof 綾諱技錛宯ew 鍜?delete 涔熶笉鏄嚱鏁幫紝瀹冧滑閮芥槸 C++ 瀹氫箟鐨勫叧閿瓧錛岄�氳繃鐗瑰畾鐨勮娉曞彲浠ョ粍鎴愯〃杈懼紡銆傚拰 sizeof 涓嶅悓鐨勬槸錛宻izeof 鍦ㄧ紪璇戞椂鍊欏氨鍙互紜畾鍏惰繑鍥炲�鹼紝new 鍜?delete 鑳屽悗鐨勬満鍒跺垯姣旇緝澶嶆潅銆?/span></p><p><span style="font-size: 14px;">銆�銆�緇х畫寰�涓嬩箣鍓嶏紝璇蜂綘鎯蟲兂浣犺涓?new 搴旇瑕佸仛浜涗粈涔堬紵涔熻浣犵涓�鍙嶅簲鏄紝new 涓嶅氨鍜?C 璇█涓殑 malloc 鍑芥暟涓�鏍峰槢錛屽氨鐢ㄦ潵鍔ㄦ�佺敵璇風┖闂寸殑銆備綘絳斿浜嗕竴鍗婏紝鐪嬬湅涓嬮潰璇彞錛?/span></p><p><span style="font-size: 14px;">銆�銆�string *ps = new string("hello world");</span></p><p><span style="font-size: 14px;">銆�銆�浣犲氨鍙互鐪嬪嚭 new 鍜?malloc 榪樻槸鏈夌偣涓嶅悓鐨勶紝malloc 鐢寵瀹岀┖闂翠箣鍚庝笉浼氬鍐呭瓨榪涜蹇呰鐨勫垵濮嬪寲錛岃�?new 鍙互銆傛墍浠?new expression 鑳屽悗瑕佸仛鐨勪簨鎯呬笉鏄綘鎯寵薄鐨勯偅涔堢畝鍗曘�傚湪鎴戠敤瀹炰緥鏉ヨВ閲?new 鑳屽悗鐨勬満鍒朵箣鍓嶏紝浣犻渶瑕佺煡閬?operator new 鍜?operator delete 鏄粈涔堢帺鎰忋�?/span></p><p><span style="font-size: 14px;">銆�銆�operator new 鍜?operator delete</span></p><p><span style="font-size: 14px;">銆�銆�榪欎袱涓叾瀹炴槸 C++ 璇█鏍囧噯搴撶殑搴撳嚱鏁幫紝鍘熷瀷鍒嗗埆濡備笅錛?/span></p><p><span style="font-size: 14px;">銆�銆�void *operator new(size_t);     //allocate an object</span></p><p><span style="font-size: 14px;">銆�銆�void *operator delete(void *);    //free an object</span></p><p><span style="font-size: 14px;">銆�銆�void *operator new[](size_t);     //allocate an array</span></p><p><span style="font-size: 14px;">銆�銆�void *operator delete[](void *);    //free an array</span></p><p><span style="font-size: 14px;">銆�銆�鍚庨潰涓や釜浣犲彲浠ュ厛涓嶇湅錛屽悗闈㈠啀浠嬬粛銆傚墠闈袱涓潎鏄?C++ 鏍囧噯搴撳嚱鏁幫紝浣犲彲鑳戒細瑙夊緱榪欐槸鍑芥暟鍚楋紵璇蜂笉瑕佹��鐤戯紝榪欏氨鏄嚱鏁幫紒C++ Primer 涓�涔︿笂璇磋繖涓嶆槸閲嶈澆 new 鍜?delete 琛ㄨ揪寮忥紙濡?operator= 灝辨槸閲嶈澆 = 鎿嶄綔絎︼級錛屽洜涓?new 鍜?delete 鏄笉鍏佽閲嶈澆鐨勩�備絾鎴戣繕娌℃悶娓呮涓轟粈涔堣鐢?operator new 鍜?operator delete 鏉ュ懡鍚嶏紝姣旇緝璐硅В銆傛垜浠彧瑕佺煡閬撳畠浠殑鎰忔�濆氨鍙互浜嗭紝榪欎袱涓嚱鏁板拰 C 璇█涓殑 malloc 鍜?free 鍑芥暟鏈夌偣鍍忎簡錛岄兘鏄敤鏉ョ敵璇峰拰閲婃斁鍐呭瓨鐨勶紝騫朵笖 operator new 鐢寵鍐呭瓨涔嬪悗涓嶅鍐呭瓨榪涜鍒濆鍖栵紝鐩存帴榪斿洖鐢寵鍐呭瓨鐨勬寚閽堛�?/span></p><p><span style="font-size: 14px;">銆�銆�鎴戜滑鍙互鐩存帴鍦ㄦ垜浠殑紼嬪簭涓嬌鐢ㄨ繖鍑犱釜鍑芥暟銆?/span></p><p><span style="font-size: 14px;">銆�銆�new 鍜?delete 鑳屽悗鏈哄埗</span></p><p><span style="font-size: 14px;">銆�銆�鐭ラ亾涓婇潰涓や釜鍑芥暟涔嬪悗錛屾垜浠敤涓�涓疄渚嬫潵瑙ｉ噴 new 鍜?delete 鑳屽悗鐨勬満鍒訛細</span></p><p><span style="font-size: 14px;">銆�銆�鎴戜滑涓嶇敤綆�鍗曠殑 C++ 鍐呯疆綾誨瀷鏉ヤ婦渚嬶紝浣跨敤澶嶆潅涓�鐐圭殑綾葷被鍨嬶紝瀹氫箟涓�涓被 A錛?/span></p><p><span style="font-size: 14px;">銆�銆�class A</span></p><p><span style="font-size: 14px;">銆�銆�{</span></p><p><span style="font-size: 14px;">銆�銆�public:</span></p><p><span style="font-size: 14px;">銆�銆�A(int v) : var(v)</span></p><p><span style="font-size: 14px;">銆�銆�{</span></p><p><span style="font-size: 14px;">銆�銆�fopen_s(&file, "test", "r");</span></p><p><span style="font-size: 14px;">銆�銆�}</span></p><p><span style="font-size: 14px;">銆�銆�~A()</span></p><p><span style="font-size: 14px;">銆�銆�{</span></p><p><span style="font-size: 14px;">銆�銆�fclose(file);</span></p><p><span style="font-size: 14px;">銆�銆�}</span></p><p><span style="font-size: 14px;">銆�銆�private:</span></p><p><span style="font-size: 14px;">銆�銆�int var;</span></p><p><span style="font-size: 14px;">銆�銆�FILE *file;</span></p><p><span style="font-size: 14px;">銆�銆�};</span></p><p><span style="font-size: 14px;">銆�銆�寰堢畝鍗曪紝綾?A 涓湁涓や釜縐佹湁鎴愬憳錛屾湁涓�涓瀯閫犲嚱鏁板拰涓�涓瀽鏋勫嚱鏁幫紝鏋勯�犲嚱鏁頒腑鍒濆鍖栫鏈夊彉閲?var 浠ュ強鎵撳紑涓�涓枃浠訛紝鏋愭瀯鍑芥暟鍏抽棴鎵撳紑鐨勬枃浠躲�?/span></p><p><span style="font-size: 14px;">銆�銆�鎴戜滑浣跨敤</span></p><p><span style="font-size: 14px;">銆�銆�class *pA = new A(10);</span></p><p><span style="font-size: 14px;">銆�銆�鏉ュ垱寤轟竴涓被鐨勫璞★紝榪斿洖鍏舵寚閽?pA銆傚涓嬪浘鎵�紺?new 鑳屽悗瀹屾垚鐨勫伐浣滐細</span></p><p><span style="font-size: 14px;">銆�銆�綆�鍗曟�葷粨涓�涓嬶細</span></p><p><span style="font-size: 14px;">銆�銆�棣栧厛闇�瑕佽皟鐢ㄤ笂闈㈡彁鍒扮殑 operator new 鏍囧噯搴撳嚱鏁幫紝浼犲叆鐨勫弬鏁頒負 class A 鐨勫ぇ灝忥紝榪欓噷涓?8 涓瓧鑺傦紝鑷充簬涓轟粈涔堟槸 8 涓瓧鑺傦紝浣犲彲浠ョ湅鐪嬨�婃繁鍏?C++ 瀵硅薄妯″瀷銆嬩竴涔︼紝榪欓噷涓嶅仛澶氳В閲娿�傝繖鏍峰嚱鏁拌繑鍥炵殑鏄垎閰嶅唴瀛樼殑璧峰鍦板潃錛岃繖閲屽亣璁炬槸 0x007da290銆?/span></p><p><span style="font-size: 14px;">銆�銆�涓婇潰鍒嗛厤鐨勫唴瀛樻槸鏈垵濮嬪寲鐨勶紝涔熸槸鏈被鍨嬪寲鐨勶紝絎簩姝ュ氨鍦ㄨ繖涓�鍧楀師濮嬬殑鍐呭瓨涓婂綾誨璞¤繘琛屽垵濮嬪寲錛岃皟鐢ㄧ殑鏄浉搴旂殑鏋勯�犲嚱鏁幫紝榪欓噷鏄皟鐢?A:A(10); 榪欎釜鍑芥暟錛屼粠鍥句腑涔熷彲浠ョ湅鍒板榪欏潡鐢寵鐨勫唴瀛樿繘琛屼簡鍒濆鍖栵紝var=10, file 鎸囧悜鎵撳紑鐨勬枃浠躲�?/span></p><p><span style="font-size: 14px;">銆�銆�鏈�鍚庝竴姝ュ氨鏄繑鍥炴柊鍒嗛厤騫舵瀯閫犲ソ鐨勫璞＄殑鎸囬拡錛岃繖閲?pA 灝辨寚鍚?0x007da290 榪欏潡鍐呭瓨錛宲A 鐨勭被鍨嬩負綾?A 瀵硅薄鐨勬寚閽堛�?/span></p><p><span style="font-size: 14px;">銆�銆�鎵�鏈夎繖涓夋錛屼綘閮藉彲浠ラ�氳繃鍙嶆眹緙栨壘鍒扮浉搴旂殑姹囩紪浠ｇ爜錛屽湪榪欓噷鎴戝氨涓嶅垪鍑轟簡銆?/span></p><p><span style="font-size: 14px;">銆�銆�濂戒簡錛岄偅涔?delete 閮藉共浜嗕粈涔堝憿錛熻繕鏄帴鐫�涓婇潰鐨勪緥瀛愶紝濡傛灉榪欐椂鎯抽噴鏀炬帀鐢寵鐨勭被鐨勫璞℃�庝箞鍔烇紵褰撶劧鎴戜滑鍙互浣跨敤涓嬮潰鐨勮鍙ユ潵瀹屾垚錛?/span></p><p><span style="font-size: 14px;">銆�銆�delete pA;</span></p><p><span style="font-size: 14px;">銆�銆�delete 鎵�鍋氱殑浜嬫儏濡備笅鍥炬墍紺猴細</span></p><p><span style="font-size: 14px;">銆�銆�delete 灝卞仛浜嗕袱浠朵簨鎯咃細</span></p><p><span style="font-size: 14px;">銆�銆�璋冪敤 pA 鎸囧悜瀵硅薄鐨勬瀽鏋勫嚱鏁幫紝瀵規墦寮�鐨勬枃浠惰繘琛屽叧闂�?/span></p><p><span style="font-size: 14px;">銆�銆�閫氳繃涓婇潰鎻愬埌鐨勬爣鍑嗗簱鍑芥暟 operator delete 鏉ラ噴鏀捐瀵硅薄鐨勫唴瀛橈紝浼犲叆鍑芥暟鐨勫弬鏁頒負 pA 鐨勫�鹼紝涔熷氨鏄?0x007d290銆?/span></p><p><span style="font-size: 14px;">銆�銆�濂戒簡錛岃В閲婂畬浜?new 鍜?delete 鑳屽悗鎵�鍋氱殑浜嬫儏浜嗭紝鏄笉鏄寰椾篃寰堢畝鍗曪紵涓嶅氨澶氫簡涓�涓瀯閫犲嚱鏁板拰鏋愭瀯鍑芥暟鐨勮皟鐢ㄥ槢銆?/span></p><p><span style="font-size: 14px;">銆�銆�濡備綍鐢寵鍜岄噴鏀句竴涓暟緇勶紵</span></p><p><span style="font-size: 14px;">銆�銆�鎴戜滑緇忓父瑕佺敤鍒板姩鎬佸垎閰嶄竴涓暟緇勶紝涔熻鏄繖鏍風殑錛?/span></p><p><span style="font-size: 14px;">銆�銆�string *psa = new string[10];      //array of 10 empty strings</span></p><p><span style="font-size: 14px;">銆�銆�int *pia = new int[10];           //array of 10 uninitialized ints</span></p><p><span style="font-size: 14px;">銆�銆�涓婇潰鍦ㄧ敵璇蜂竴涓暟緇勬椂閮界敤鍒頒簡 new [] 榪欎釜琛ㄨ揪寮忔潵瀹屾垚錛屾寜鐓ф垜浠笂闈㈣鍒扮殑 new 鍜?delete 鐭ヨ瘑錛岀涓�涓暟緇勬槸 string 綾誨瀷錛屽垎閰嶄簡淇濆瓨瀵硅薄鐨勫唴瀛樼┖闂翠箣鍚庯紝灝嗚皟鐢?string 綾誨瀷鐨勯粯璁ゆ瀯閫犲嚱鏁頒緷嬈″垵濮嬪寲鏁扮粍涓瘡涓厓绱狅紱絎簩涓槸鐢寵鍏鋒湁鍐呯疆綾誨瀷鐨勬暟緇勶紝鍒嗛厤浜嗗瓨鍌?10 涓?int 瀵硅薄鐨勫唴瀛樼┖闂達紝浣嗗茍娌℃湁鍒濆鍖栥�?/span></p><p><span style="font-size: 14px;">銆�銆�濡傛灉鎴戜滑鎯抽噴鏀劇┖闂翠簡錛屽彲浠ョ敤涓嬮潰涓ゆ潯璇彞錛?/span></p><p><span style="font-size: 14px;">銆�銆�delete [] psa;</span></p><p><span style="font-size: 14px;">銆�銆�delete [] pia;</span></p><p><span style="font-size: 14px;">銆�銆�閮界敤鍒?delete [] 琛ㄨ揪寮忥紝娉ㄦ剰榪欏湴鏂圭殑 [] 涓�鑸儏鍐典笅涓嶈兘婕忔帀錛佹垜浠篃鍙互鎯寵薄榪欎袱涓鍙ュ垎鍒共浜嗕粈涔堬細絎竴涓 10 涓?string 瀵硅薄鍒嗗埆璋冪敤鏋愭瀯鍑芥暟錛岀劧鍚庡啀閲婃斁鎺変負瀵硅薄鍒嗛厤鐨勬墍鏈夊唴瀛樼┖闂達紱絎簩涓洜涓烘槸鍐呯疆綾誨瀷涓嶅瓨鍦ㄦ瀽鏋勫嚱鏁幫紝鐩存帴閲婃斁涓?10 涓?int 鍨嬪垎閰嶇殑鎵�鏈夊唴瀛樼┖闂淬�?/span></p><p><span style="font-size: 14px;">銆�銆�榪欓噷瀵逛簬絎竴縐嶆儏鍐靛氨鏈変竴涓棶棰樹簡錛氭垜浠浣曠煡閬?psa 鎸囧悜瀵硅薄鐨勬暟緇勭殑澶у皬錛熸�庝箞鐭ラ亾璋冪敤鍑犳鏋愭瀯鍑芥暟錛?/span></p><p><span style="font-size: 14px;">銆�銆�榪欎釜闂鐩存帴瀵艱嚧鎴戜滑闇�瑕佸湪 new [] 涓�涓璞℃暟緇勬椂錛岄渶瑕佷繚瀛樻暟緇勭殑緇村害錛孋++ 鐨勫仛娉曟槸鍦ㄥ垎閰嶆暟緇勭┖闂存椂澶氬垎閰嶄簡 4 涓瓧鑺傜殑澶у皬錛屼笓闂ㄤ繚瀛樻暟緇勭殑澶у皬錛屽湪 delete [] 鏃跺氨鍙互鍙栧嚭榪欎釜淇濆瓨鐨勬暟錛屽氨鐭ラ亾浜嗛渶瑕佽皟鐢ㄦ瀽鏋勫嚱鏁板灝戞浜嗐�?/span></p><p><span style="font-size: 14px;">銆�銆�榪樻槸鐢ㄥ浘鏉ヨ鏄庢瘮杈冩竻妤氾紝鎴戜滑瀹氫箟浜嗕竴涓被 A錛屼絾涓嶅叿浣撴弿榪扮被鐨勫唴瀹癸紝榪欎釜綾諱腑鏈夋樉紺虹殑鏋勯�犲嚱鏁般�佹瀽鏋勫嚱鏁扮瓑銆傞偅涔?褰撴垜浠皟鐢?/span></p><p><span style="font-size: 14px;">銆�銆�class A *pAa = new A[3];</span></p><p><span style="font-size: 14px;">銆�銆�鏃墮渶瑕佸仛鐨勪簨鎯呭涓嬶細</span></p><p><span style="font-size: 14px;">銆�銆�浠庤繖涓浘涓垜浠彲浠ョ湅鍒扮敵璇鋒椂鍦ㄦ暟緇勫璞＄殑涓婇潰榪樺鍒嗛厤浜?4 涓瓧鑺傜敤鏉ヤ繚瀛樻暟緇勭殑澶у皬錛屼絾鏄渶緇堣繑鍥炵殑鏄璞℃暟緇勭殑鎸囬拡錛岃�屼笉鏄墍鏈夊垎閰嶇┖闂寸殑璧峰鍦板潃銆?/span></p><p><span style="font-size: 14px;">銆�銆�榪欐牱鐨勮瘽錛岄噴鏀懼氨寰堢畝鍗曚簡錛?/span></p><p><span style="font-size: 14px;">銆�銆�delete pAa;</span></p><p><span style="font-size: 14px;">銆�銆�榪欓噷瑕佹敞鎰忕殑涓ょ偣鏄細</span></p><p><span style="font-size: 14px;">銆�銆�璋冪敤鏋愭瀯鍑芥暟鐨勬鏁版槸浠庢暟緇勫璞℃寚閽堝墠闈㈢殑 4 涓瓧鑺備腑鍙栧嚭錛?/span></p><p><span style="font-size: 14px;">銆�銆�浼犲叆 operator delete[] 鍑芥暟鐨勫弬鏁頒笉鏄暟緇勫璞＄殑鎸囬拡 pAa錛岃�屾槸 pAa 鐨勫�煎噺 4銆?/span></p><p><span style="font-size: 14px;">銆�銆�涓轟粈涔?new/delete 銆乶ew []/delete[] 瑕侀厤瀵逛嬌鐢紵</span></p><p><span style="font-size: 14px;">銆�銆�鍏跺疄璇翠簡榪欎箞澶氾紝榪樻病鍒版垜鍐欒繖綃囨枃绔犵殑鏈�鍘熷鎰忓浘銆備粠涓婇潰瑙ｉ噴鐨勪綘搴旇鎳備簡 new/delete銆乶ew[]/delete[] 鐨勫伐浣滃師鐞嗕簡錛屽洜涓哄畠浠箣闂存湁宸埆錛屾墍浠ラ渶瑕侀厤瀵逛嬌鐢ㄣ�備絾鍋忓亸闂涓嶆槸榪欎箞綆�鍗曪紝榪欎篃鏄垜閬囧埌鐨勯棶棰橈紝濡備笅榪欐浠ｇ爜錛?/span></p><p><span style="font-size: 14px;">銆�銆�int *pia = new int[10];</span></p><p><span style="font-size: 14px;">銆�銆�delete []pia;</span></p><p><span style="font-size: 14px;">銆�銆�榪欒偗瀹氭槸娌￠棶棰樼殑錛屼絾濡傛灉鎶?delete []pia; 鎹㈡垚 delete pia; 鐨勮瘽錛屼細鍑洪棶棰樺悧錛?/span></p><p><span style="font-size: 14px;">銆�銆�榪欏氨娑夊強鍒頒笂闈竴鑺傛病鎻愬埌鐨勯棶棰樹簡銆備笂闈㈡垜鎻愬埌浜嗗湪 new [] 鏃跺鍒嗛厤 4 涓瓧鑺傜殑緙樼敱錛屽洜涓烘瀽鏋勬椂闇�瑕佺煡閬撴暟緇勭殑澶у皬錛屼絾濡傛灉涓嶈皟鐢ㄦ瀽鏋勫嚱鏁板憿錛堝鍐呯疆綾誨瀷錛岃繖閲岀殑 int 鏁扮粍錛夛紵鎴戜滑鍦?new [] 鏃跺氨娌″繀瑕佸鍒嗛厤閭?4 涓瓧鑺傦紝 delete [] 鏃剁洿鎺ュ埌絎簩姝ラ噴鏀句負 int 鏁扮粍鍒嗛厤鐨勭┖闂淬�傚鏋滆繖閲屼嬌鐢?delete pia;閭ｄ箞灝嗕細璋冪敤 operator delete 鍑芥暟錛屼紶鍏ョ殑鍙傛暟鏄垎閰嶇粰鏁扮粍鐨勮搗濮嬪湴鍧�錛屾墍鍋氱殑浜嬫儏灝辨槸閲婃斁鎺夎繖鍧楀唴瀛樼┖闂淬�備笉瀛樺湪闂鐨勩�?/span></p><p><span style="font-size: 14px;">銆�銆�榪欓噷璇寸殑浣跨敤 new [] 鐢?delete 鏉ラ噴鏀懼璞＄殑鎻愬墠鏄細瀵硅薄鐨勭被鍨嬫槸鍐呯疆綾誨瀷鎴栬�呮槸鏃犺嚜瀹氫箟鐨勬瀽鏋勫嚱鏁扮殑綾葷被鍨嬶紒</span></p><p><span style="font-size: 14px;">銆�銆�鎴戜滑鐪嬬湅濡傛灉鏄甫鏈夎嚜瀹氫箟鏋愭瀯鍑芥暟鐨勭被綾誨瀷錛岀敤 new [] 鏉ュ垱寤虹被瀵硅薄鏁扮粍錛岃�岀敤 delete 鏉ラ噴鏀句細鍙戠敓浠�涔堬紵鐢ㄤ笂闈㈢殑渚嬪瓙鏉ヨ鏄庯細</span></p><p><span style="font-size: 14px;">銆�銆�class A *pAa = new class A[3];</span></p><p><span style="font-size: 14px;">銆�銆�delete pAa;</span></p><p><span style="font-size: 14px;">銆�銆�閭ｄ箞 delete pAa; 鍋氫簡涓や歡浜嬶細</span></p><p><span style="font-size: 14px;">銆�銆�璋冪敤涓�嬈?pAa 鎸囧悜鐨勫璞＄殑鏋愭瀯鍑芥暟錛?/span></p><p><span style="font-size: 14px;">銆�銆�璋冪敤 operator delete(pAa); 閲婃斁鍐呭瓨銆?/span></p><p><span style="font-size: 14px;">銆�銆�鏄劇劧錛岃繖閲屽彧瀵規暟緇勭殑絎竴涓被瀵硅薄璋冪敤浜嗘瀽鏋勫嚱鏁幫紝鍚庨潰鐨勪袱涓璞″潎娌¤皟鐢ㄦ瀽鏋勫嚱鏁幫紝濡傛灉綾誨璞′腑鐢寵浜嗗ぇ閲忕殑鍐呭瓨闇�瑕佸湪鏋愭瀯鍑芥暟涓噴鏀撅紝鑰屼綘鍗村湪閿�姣佹暟緇勫璞℃椂灝戣皟鐢ㄤ簡鏋愭瀯鍑芥暟錛岃繖浼氶�犳垚鍐呭瓨娉勬紡銆?/span></p><p><span style="font-size: 14px;">銆�銆�涓婇潰鐨勯棶棰樹綘濡傛灉璇存病鍏崇郴鐨勮瘽錛岄偅涔堢浜岀偣灝辨槸鑷村懡鐨勪簡錛佺洿鎺ラ噴鏀?pAa 鎸囧悜鐨勫唴瀛樼┖闂達紝榪欎釜鎬繪槸浼氶�犳垚涓ラ噸鐨勬閿欒錛岀▼搴忓繀鐒朵細濂旀簝錛佸洜涓哄垎閰嶇殑絀洪棿鐨勮搗濮嬪湴鍧�鏄?pAa 鎸囧悜鐨勫湴鏂瑰噺鍘?4 涓瓧鑺傜殑鍦版柟銆備綘搴旇浼犲叆鍙傛暟璁句負閭ｄ釜鍦板潃錛?/span></p><p><br/></p></div> </div> </div> </div> <div class="clear"></div> <div class="foot"> <div class="foot_menu"> <ul> <li><a href="/About/">鍏充簬鎴戜滑</a></li> <li><a href="/Advantage/">寮�鍙戜紭鍔?/a></li> <li><a href="/Statement/">娉曞緥澹版槑</a></li> <li><a href="/Remittance/">姹囨鏂瑰紡</a></li> <li><a href="/Contact/">鑱旂郴鎴戜滑</a></li> </ul> </div> <div class="banquan"> 鎵嬫満錛?8678812288 E錛峂ail:1069706080@qq.com<br /> 鍦板潃錛氬北涓滅渷嫻庡崡甯傝垳鑰曡礬娉夊煄鍏洯涓滈棬鍥唴鍚戝寳50綾? 椴両CP澶?7011972鍙? 鐗堟潈鎵�鏈?008錛?013 灞變笢璧㈠痙淇℃伅縐戞妧鏈夐檺鍏徃<script type="text/javascript"> var _bdhmProtocol = (("https:" == 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