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,国产综合成人久久大片91 http://www.shnenglu.com/lynch/zh-cn Wed, 07 May 2025 01:04:16 GMT Wed, 07 May 2025 01:04:16 GMT 60 listen()鐨刡acklog鍙傛暟灝忕粨 http://www.shnenglu.com/lynch/archive/2012/12/30/196855.html钁d笁 钁d笁 Sun, 30 Dec 2012 07:52:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/30/196855.html http://www.shnenglu.com/lynch/comments/196855.html http://www.shnenglu.com/lynch/archive/2012/12/30/196855.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/196855.html http://www.shnenglu.com/lynch/services/trackbacks/196855.html listen鍑芥暟鏄綉緇滅紪紼嬩竴涓熀鏈殑鍑芥暟錛岃屼笖瀹冪殑backlog鍙傛暟鍗存槸鍜孴CP鍗忚鎭伅鐩稿叧鐨勩傛垜浠潵鐪嬩竴涓嬩竴涓猙acklog鍙傛暟鍒板簳鏈夊灝戠瀵嗐?/span>
涓銆?涓轟簡鐞嗚Вbacklog鍙傛暟錛屾垜浠繀欏婚鍏堣璇唋isten鍑芥暟銆?/font>
#include<sys/socket.h>
int listen(int sockfd, int backlog);
listen鍑芥暟浠呯敱TCP鏈嶅姟鍣ㄨ皟鐢紝瀹冨仛涓や歡浜嬫儏錛?/p>
1銆佸綋socket鍑芥暟鍒涘緩涓涓鎺ュ彛鏃訛紝瀹冭鍋囪涓轟竴涓富鍔ㄥ瑁呭彛錛屼篃灝辨槸璇達紝瀹冩槸涓涓皢璋冪敤connet鍙戣搗榪炴帴鐨勫鎴峰鎺ュ彛銆俵isten鍑芥暟鎶婁竴涓湭榪炴帴鐨勫鎺ュ彛杞崲鎴愪竴涓鍔ㄥ鎺ュ彛錛屾寚紺哄唴鏍稿簲鎺ュ彈鎸囧悜璇ュ鎺ュ彛鐨勮繛鎺ヨ姹傘傛牴鎹甌CP鐘舵佽漿鎹㈠浘錛岃皟鐢╨isten瀵艱嚧濂楁帴鍙d粠CLOSED鐘舵佽漿鎹㈠埌LISTEN鐘舵併?
2銆佹湰鍑芥暟鐨勭浜屼釜鍙傛暟瑙勫畾浜嗗唴鏍稿簲璇ヤ負鐩稿簲濂楁帴鍙f帓闃熺殑鏈澶ц繛鎺ヤ釜鏁般?
涓轟簡鏇村ソ鐨勭悊瑙acklog鍙傛暟錛屾垜浠繀欏昏璇嗗埌鍐呮牳涓轟換浣曚竴涓粰瀹氱殑鐩戝惉濂楁帴鍙g淮鎶や袱涓槦鍒楋細
1銆佹湭瀹屾垚榪炴帴闃熷垪錛坕ncomplete connection queue錛夛紝 姣忎釜榪欐牱鐨凷YN鍒嗚妭瀵瑰簲鍏朵腑涓欏癸細宸茬敱鏌愪釜瀹㈡埛鍙戝嚭騫跺埌杈炬湇鍔″櫒錛岃屾湇鍔″櫒姝e湪絳夊緟瀹屾垚鐩稿簲鐨凾CP涓夎礬鎻℃墜榪囩▼銆傝繖浜涘鎺ュ彛澶勪簬SYN_RCVD鐘舵併?
2銆佸凡瀹屾垚榪炴帴闃熷垪錛坈ompleted connection queue錛夛紝 姣忎釜宸插畬鎴怲CP涓夎礬鎻℃墜榪囩▼鐨勫鎴峰搴斿叾涓竴欏廣傝繖浜涘鎺ュ彛澶勪簬ESTABLISHED鐘舵併?
褰撴潵鑷鎴風殑SYN鍒拌揪鏃訛紝TCP鍦ㄦ湭瀹屾垚榪炴帴闃熷垪涓垱寤轟竴涓柊欏癸紝鐒跺悗鍝嶅簲浠ヤ笁璺彙鎵嬬殑絎簩涓垎鑺傦細鏈嶅姟鍣ㄧ殑SYN鍝嶅簲錛屽叾涓◢甯﹀瀹㈡埛SYN鐨凙CK錛堝嵆SYN+ACK錛夈傝繖涓欏逛竴鐩翠繚鐣欏湪鏈畬鎴愯繛鎺ラ槦鍒椾腑錛岀洿鍒頒笁璺彙鎵嬬殑絎笁涓垎鑺傦紙瀹㈡埛瀵規湇鍔″櫒SYN鐨凙CK錛夊埌杈炬垨鑰呰欏硅秴鏃朵負姝紙鏇劇粡婧愯嚜Berkeley鐨勫疄鐜頒負榪欎簺鏈畬鎴愯繛鎺ョ殑欏硅緗殑瓚呮椂鍊間負75縐掞級銆傚鏋滀笁璺彙鎵嬫甯稿畬鎴愶紝璇ラ」灝變粠鏈畬鎴愯繛鎺ラ槦鍒楃Щ鍒板凡瀹屾垚榪炴帴闃熷垪鐨勯槦灝俱傚綋榪涚▼璋冪敤accept鏃訛紝宸插畬鎴愯繛鎺ラ槦鍒椾腑鐨勯槦澶撮」灝嗚繑鍥炵粰榪涚▼錛屾垨鑰呭鏋滆闃熷垪涓虹┖錛岄偅涔堣繘紼嬪皢琚姇鍏ョ潯鐪狅紝鐩村埌TCP鍦ㄨ闃熷垪涓斁鍏ヤ竴欏規墠鍞ら啋瀹冦?
浜屻佹煡鐪媘an鎵嬪唽銆傜湅鐪媘an listen鎬庝箞璇?/font>
鍙互鐪嬪埌man鎵嬪唽鏄繖鏍鋒弿榪癰acklog鍙傛暟鐨勶細“backlog鍙傛暟紜畾浜哻onnection闃熷垪鍙互澧為暱鐨勬渶澶ч暱搴?#8221;錛屽鏋渃onnection闃熷垪宸叉弧錛堣揪鍒癰acklog紜畾鐨勯暱搴︼級錛岄偅涔堟柊鐨刢onnection璇鋒眰鍒版潵鏃訛紝瀹㈡埛绔細寰楀埌涓涓狤CONNREFUSED error錛屾垨鑰咃紝濡傛灉搴曞眰鍗忚鏀寔閲嶅彂錛岄偅涔堣繖涓姹備細琚湇鍔″櫒蹇界暐鑰屼嬌瀹㈡埛绔噸鏂板彂閫乧onnection璇鋒眰銆?
鐜板湪backlog鐢ㄦ潵紜畾宸插畬鎴愰槦鍒楋紙瀹屾垚涓夋鎻℃墜絳夊緟accept錛夌殑闀垮害錛岃屼笉鍐嶆槸宸插畬鎴愰槦鍒楀拰鏈畬鎴愯繛鎺ラ槦鍒椾箣鍜岋紙linux 2.2涔嬪墠錛夈?
鏈畬鎴愰槦鍒楋紙incomplete connection queue錛夌殑闀垮害鐜板湪鐢?proc/sys/net/ipv4/tcp_max_syn_backlog璁劇疆錛屽湪鐜板湪澶у鏁版渶鏂發inux鍐呮牳閮芥槸榛樿512錛岃繖涓緗湁鏁堢殑鍓嶆彁鏄郴緇熺殑syncookies鍔熻兘琚鐢紝濡傛灉緋葷粺鐨剆yncookies鍔熻兘琚惎鐢紝閭d箞榪欎釜璁劇疆鏄棤鏁堢殑銆係yncookies鏄湪鍐呮牳緙栬瘧鐨勬椂鍊欒緗殑錛屾煡鐪媠yncookies鏄惁鍚姩錛?
cat /proc/sys/net/ipv4/tcp_syncookies
濡傛灉鏄?#8220;1”璇存槑宸插惎鐢紝涓?#8220;0”璇存槑鏈惎鐢ㄣ?
閭d箞涓簊yncookies鏄仛浠涔堢殑鍛紝涓轟粈涔堝畠浼氬拰鏈畬鎴愰槦鍒楁湁鍏崇郴銆傜畝鍗曠殑璇村畠鏄負闃茶寖SYN Flood鏀誨嚮鐨勮璁°傚叿浣撹鍙傝?#8220;syncookies浠嬬粛”錛坔ttp://baike.baidu.com/view/9033755.htm錛夈?
緇х畫鐪媌acklog錛屽鏋滄垜浠粰listen鐨刡acklog鍙傛暟璁懼艱秴榪囦簡/proc/sys/net/core/somaxconn錛岄偅涔坆acklog鍙傛暟鐨勫間負鑷姩琚敼鍐欎負/proc/sys/net/core/somaxconn鐨勫鹼紝瀹冪殑榛樿澶у皬涓?28.
鏇村璧勬枡鍙互鏌ョ湅
1銆?man tcp
2銆?man listen
3銆?銆妘nix緗戠粶緙栫▼鍗蜂竴銆?
4銆?鐧懼害鐧劇syncookies浠嬬粛錛歨ttp://baike.baidu.com/view/9033755.htm
]]>C++ UML灝忕粨 http://www.shnenglu.com/lynch/archive/2012/12/21/196518.html钁d笁 钁d笁 Fri, 21 Dec 2012 14:09:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/21/196518.html http://www.shnenglu.com/lynch/comments/196518.html http://www.shnenglu.com/lynch/archive/2012/12/21/196518.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/196518.html http://www.shnenglu.com/lynch/services/trackbacks/196518.html 鍦║ML綾誨浘涓?綾諱笌綾諱箣闂存湁鍑犵甯歌鍏崇郴:渚濊禆銆佸叧鑱斻佽仛鍚堛佺粍鍚堛佹硾鍖栥? 1銆佷緷璧栵紙Dependency錛?/strong>
渚濊禆鏄竴縐嶅緢鏈夌敤鐨勫叧緋伙紝瀹冪敤鏉ヨ〃榪頒竴涓被A“use”浜嗗彟涓涓被B銆侫鍙互鏄氳繃浠諱綍鏂瑰紡“use”綾籅錛屽錛?/p>
1錛堿鐨勬垚鍛樺嚱鏁扮殑榪斿洖鍊間負B錛?/font>
2錛堿鐨勬垚鍛樺嚱鏁頒嬌鐢˙浣滀負鍑芥暟鍙傛暟錛?/font>
3錛堿鐨勬垚鍛樺嚱鏁扮殑鍐呴儴瀹炵幇浣跨敤浜咮錛?/font>
渚濊禆鍏崇郴閫氬父浣跨敤铏氱嚎綆ご“---->”琛ㄧず錛岀澶存寚鍚戣“use”鐨勭被銆?
鍦–++浠g爜涓紝渚濊禆鍏崇郴鏄繖鏍峰搴旂殑錛?/p>
class A
{ public: B returns_a_B();
void has_a_B_argument(B);
void has_a_B_in_its_implementation();
};
A::void has_a_B_in_its_implementation(){ B b; }
2銆佸叧鑱旓紙Association錛?/strong>
鍏寵仈鍙互琛ㄨ堪鎴愪竴涓被“鐭ラ亾”鍙︿竴涓被銆傚浣?#8220;鐭ラ亾”鍛紵鍦–++涓紝綾籄“鐭ラ亾”綾籅涓鑸槸閫氳繃鎸囬拡瀹炵幇鐨勶紙涔熷彲浠ヤ嬌鐢ㄥ紩鐢ㄦ垨鑰呭鹼級錛屽嵆綾籄鏈変竴涓垚鍛樺彉閲忔槸鎸囧悜B鐨勬寚閽堬紙鎴栬呭紩鐢ㄣ佸鹼級銆?/p>
鍏寵仈鍙互鍒嗕負鍙屽悜鍏寵仈銆佸崟鍚戝叧鑱斻佽嚜韜叧鑱斻?
1錛夊弻鍚戝叧鑱?
鍙屽悜鍏寵仈A-B錛氬弻鏂歸兘“鐭ラ亾”瀵規柟錛岄兘鍙互璋冪敤瀵規柟鐨勫叕鍏卞睘鎬у拰鏂規硶銆?
瀵瑰簲鐨凜++浠g爜涓猴細
class A {
public:
B* pB;
};
class B {
public:
A* pA;
};
2錛夊崟鍚戝叧鑱?
鍗曞悜鍏寵仈A->B錛氳〃紺篈“鐭ラ亾”B錛孉鍙互璋冪敤B鐨勫叕鍏卞睘鎬у拰鏂規硶銆傛病鏈夌敓鍛藉懆鏈熺殑渚濊禆銆?
瀵瑰簲鐨凜++浠g爜涓猴細
class A {
public:
B* pB;
};
class B {
};
3錛夎嚜韜叧鑱?
鑷韓鍏寵仈錛氳嚜宸卞紩鐢ㄨ嚜宸憋紝榪欎釜鍦ㄩ摼琛ㄤ腑闈炲父甯歌銆?/p>
鍙互鐪嬪埌錛屼笂闈㈢殑Object綾伙紝灝辨槸涓涓嚜韜叧鑱旂殑搴旂敤錛屽畠鏈変竴涓嚜宸辨寚鍚戣嚜宸辯殑鎸囬拡錛岀敤鏉ュ疄鐜伴摼琛ㄣ?
瀵瑰簲鐨凜++浠g爜涓猴細
class Object {
public:
int data;
Object* next;
};
class ObjectList {
public:
Object* first;
ObjectList();
void insert(Object* obj);
void print() const;
};
3銆佽仛鍚堬紙Aggregation錛夊拰緇勫悎錛圕omposition錛?/strong>
鑱氬悎鍜岀粍鍚堥兘鏄敤鍦ㄨ〃榪版暣浣?閮ㄥ垎鍏崇郴鐨勬椂鍊欙紝浜岃呭彧鏄湪鐢熷懡鍛ㄦ湡闂涓婃湁宸紓銆?/p>
1錛夎仛鍚堥氬父鍙互鐞嗚В鎴?#8220;has a”鍏崇郴銆傚鏋滅被A鑱氬悎綾籅錛岄偅涔堢被A“has a”綾籅錛屽悓鏃訛紝鍦ˋ鐨勭敓鍛藉懆鏈熺粨鏉熷悗綾籅蹇呴』渚濈劧瀛樺湪鎴栬呮湁鎰忎箟銆傛瘮濡傛埧闂存湁涓寮犳瀛愶紝閭d箞鎴塊棿鍜屾瀛愮殑鍏崇郴灝辨槸鑱氬悎錛氬嵆浣挎埧闂存病鏈変簡錛岄偅寮犳瀛愯繕鏄瓨鍦ㄧ殑錛屾瀛愭槸鍙互鑴辯鎴塊棿鑰屽瓨鍦ㄧ殑銆?
瀵瑰簲鐨凜++浠g爜錛?/p>
class Table {
};
class Room {
public:
Table aTable;
};
2錛夌粍鍚堥氬父鍙互鐞嗚В涓?#8220;is a part of”銆傚拰鑱氬悎涓嶅悓鐨勬槸錛屽鏋滅被A緇勫悎綾籅錛岄偅涔堝綋A鐢熷懡鍛ㄦ湡緇撴潫鍚庯紝綾籅涔熼殢涔嬬粨鏉燂紝涔熷氨鏄B涓嶈兘鑴辯綾籄鑰屽瓨鍦ㄣ傚氨濡傚悓楦熼兘鏈変袱鍙繀鑶涓鏍鳳紝褰撻笩娑堝け浜嗭紝緲呰唨涔熼殢涔嬩笉瀛樺湪浜嗐?
瀵瑰簲鐨凜++浠g爜錛?/p>
class Wing {
};
class Bird{
public:
Wing leftWing;
Wing rightWing;
};
鍙互鍙戠幇錛屽鏋滃崟綰粠C++浠g爜鏉ョ湅錛岃仛鍚堝叧緋誨拰緇勫悎鍏崇郴娌℃湁浠涔堜笉鍚岋紝瑕佸尯鍒嗚仛鍚堝拰緇勫悎錛屽彧鑳戒粠璇箟鍒嗘瀽銆?/font>
琛ュ厖錛?/strong>
緇勫悎鍏崇郴榪樻湁鍙︿竴灞傚惈涔夛細“is a”銆備笉榪囪繖縐嶅惈涔夛紝浠呬粎鐢ㄦ潵瑙掕壊鏂歸潰錛屽嵆“is a”瑙掕壊銆傛瘮濡備竴涓漢錛屾槸涓堝か瑙掕壊銆傞偅涔熷彲浠ョ湅鍋氱粍鍚堬紱鎵嬫満鍙互鐪嬪仛“Camera”銆?#8220;Music Player”絳夈?
浠庝笂鍥炬垜浠彲浠ョ湅鍑猴紝Battery鍜孲mart Phone鏄仛鍚堝叧緋伙紝鍥犱負鐢墊睜鏄墜鏈虹殑涓閮ㄥ垎錛屼絾鏄數姹犲彲浠ヨ劚紱繪墜鏈鴻屽瓨鍦ㄣ傝孖MEI Number鍜孲mart Phone鏄粍鍚堝叧緋伙紝涓鑸儏鍐典笅涓涓猄mart Phone鍙湁涓涓狪MEI Number,鎵嬫満娑堝け鍚庯紝IMEI璺熺潃娑堝け銆傝屾垜浠煡閬撶幇鍦ㄧ殑鎵嬫満鍙互鎷嶇収銆佷笂緗戙佹挱鏀鵑煶涔愶紝鍥犳鎵嬫満鍙互鎵紨鐩告満銆亀eb鍐叉氮銆侀煶涔愭挱鏀懼櫒鐨勮鑹詫紝鎵浠mart phone鍜孋amera銆乄eb Browser銆丮usic Player鏄粍鍚堢殑鍏崇郴銆?/p>
4銆佹硾鍖栵紙Realization錛?/strong>
娉涘寲鍏崇郴涔熻甯哥敤浣滅戶鎵匡紙inherit錛夊叧緋伙紝鏄敤鏉ヨ〃榪?#8220;Is-a”榪欑鍏崇郴鐨勶紝姣斿Car鍜孭olice-Car鐨勫叧緋伙紝Police-Car “is a” Car銆?
瀵瑰簲鐨凜++浠g爜涓猴細
class Car {
};
class Police_Car{
};
]]> ubuntu瀹夎libevent http://www.shnenglu.com/lynch/archive/2012/12/21/196504.html钁d笁 钁d笁 Fri, 21 Dec 2012 06:35:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/21/196504.html http://www.shnenglu.com/lynch/comments/196504.html http://www.shnenglu.com/lynch/archive/2012/12/21/196504.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/196504.html http://www.shnenglu.com/lynch/services/trackbacks/196504.html 1銆?/configure
make
sudo make install
2銆侀氳繃gcc echo.c -levent鍙互緙栬瘧鎴愬姛錛屼絾鏄竴榪愯灝辨姤閿欙細“error while loading shared libraries: libevent-1.4.so.2: cannot open shared”
3銆佽В鍐蟲柟娉曪紝鏌ユ壘libevent-1.4.so.2搴擄紝find / –name ‘libevent-1.4.so.2’
鍙戠幇鎵鍦ㄨ礬寰勪負/usr/local/lib/libevent-1.4.so.2
寤虹珛涓涓鍙烽摼鎺ュ埌/usr/lib/libevent-1.4.so.2
ln -s /usr/local/lib/libevent-1.4.so.2 /usr/local/
]]> 緇熻浠g爜琛屾暟 http://www.shnenglu.com/lynch/archive/2012/12/16/196343.html钁d笁 钁d笁 Sat, 15 Dec 2012 16:18:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/16/196343.html http://www.shnenglu.com/lynch/comments/196343.html http://www.shnenglu.com/lynch/archive/2012/12/16/196343.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/196343.html http://www.shnenglu.com/lynch/services/trackbacks/196343.html 鍦ㄦ垜浠鉤鏃跺啓浠g爜榪囩▼涓紝鏈夋椂鍊欐兂鐭ラ亾鎴戜滑瀹屾垚鐨勭▼搴忓埌搴曟湁澶氬皯琛屼唬鐮侊紙鎹寰堝闈㈣瘯鐨勭闉嬩細琚潰璇曞畼闂埌榪欎釜闂錛夈傚湪榪欓噷錛屾垜鍒嗕韓涓涓嬫垜鑷繁緇熻浠g爜鐨勬柟娉曘?/span> 鎴戜滑榪欓噷浠ョ粺璁?#8220;.h”鍜?#8220;.cpp”涓哄悗緙鐨勬簮鐮佹枃浠朵負渚嬶紝浣嗘槸鍚屾牱鍙互鐢ㄤ簬緇熻“.hpp”銆?#8220;.cc”銆?#8220;.c”銆?#8220;.py”銆?#8220;.java”銆?#8220;.html”絳夋墍鏈夊悗緙鍚嶆枃浠躲?/div>
棣栧厛鐪嬩竴涓嬬洰褰曠粨鏋?/div>
瑕佺粺璁′唬鐮佽鏁幫紝鎴戜滑闇瑕佺敤鍒皐c鍛戒護銆?#8220;wc -l filename”鍙互鐢ㄦ潵緇熻filename鐨勮鏁般傛瘮濡?/div>
瑕佺粺璁℃墍鏈夌殑“.h”鍜?.cpp"鐨勬枃浠惰鏁幫紝榪橀渶瑕佷嬌鐢╢ind鍛戒護銆?/div>
鏂規硶涓錛?/strong>
鍒嗗埆緇熻“.h”鍜?#8220;.cpp”鐨勮鏁幫紝鍐嶆妸瀹冧滑鍔犺搗鏉ャ?/div>
wc - l `find . - name '*.h' ` ; wc - l `find . - name '*.cpp' ` 緇撴灉濡備笅錛?span style="word-wrap: break-word; white-space: pre;">
铏界劧寰楀埌浜嗙粨鏋滐紝浣嗘槸“.h”銆?#8220;.cpp”浠g爜琛屾暟鏄垎鍒粺璁$殑銆?/div>
鏂規硶浜岋細
浣跨敤-or鍛戒護榪炴帴澶氫釜琛ㄨ揪寮忋?/span>
wc - l `find . - name '*.h' - or - name '*.cpp' ` 緇撴灉濡備笅錛?/div>
鏂規硶涓夛細
浣跨敤姝e垯琛ㄨ揪寮忋?/div>
wc - l `find . / - name "*.[hc]*" ` 緇撴灉濡備笅錛?/div>
闄勫父鐢ㄦ鍒欒〃杈懼紡鎰忎箟錛?br style="word-wrap: break-word;" />
\ 灝嗕笅涓涓瓧絎︽爣璁頒負涓涓壒孌婂瓧絎︺佹垨涓涓師涔夊瓧絎︺佹垨涓涓悗鍚戝紩鐢ㄣ佹垨涓涓叓榪涘埗杞箟絎︺?nbsp; ^ 鍖歸厤杈撳叆瀛楃涓茬殑寮濮嬩綅緗傚鏋滆緗簡 RegExp 瀵硅薄鐨凪ultiline 灞炴э紝^ 涔熷尮閰?’\n’ 鎴?’\r’ 涔嬪悗鐨勪綅緗?nbsp; $ 鍖歸厤杈撳叆瀛楃涓茬殑緇撴潫浣嶇疆銆傚鏋滆緗簡 RegExp 瀵硅薄鐨凪ultiline 灞炴э紝$ 涔熷尮閰?’\n’ 鎴?’\r’ 涔嬪墠鐨勪綅緗?nbsp; * 鍖歸厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忛浂嬈℃垨澶氭銆?nbsp;+ 鍖歸厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忎竴嬈℃垨澶氭銆?span style="word-wrap: break-word; color: #0000cc;">+ 絳変環浜?nbsp;{ 1, } 銆?nbsp;? 鍖歸厤鍓嶉潰鐨勫瓙琛ㄨ揪寮忛浂嬈℃垨涓嬈°? 絳変環浜?nbsp;{ 0, 1} 銆?nbsp; { n} n 鏄竴涓潪璐熸暣鏁幫紝鍖歸厤紜畾鐨刵 嬈°?nbsp;{ n, } n 鏄竴涓潪璐熸暣鏁幫紝鑷沖皯鍖歸厤n 嬈°?nbsp;{ n, m} m 鍜?n 鍧囦負闈炶礋鏁存暟錛屽叾涓璶 < = m銆傛渶灝戝尮閰?n 嬈′笖鏈澶氬尮閰?m 嬈°傚湪閫楀彿鍜屼袱涓暟涔嬮棿涓嶈兘鏈夌┖鏍箋?nbsp;? 褰撹瀛楃绱ц窡鍦ㄤ換浣曚竴涓叾浠栭檺鍒剁 ( * , + , ?, { n} , { n, } , { n, m} ) 鍚庨潰鏃訛紝鍖歸厤妯″紡鏄潪璐┆鐨勩傞潪璐┆妯″紡灝藉彲鑳藉皯鐨勫尮閰嶆墍鎼滅儲鐨勫瓧絎︿覆錛岃岄粯璁ょ殑璐┆妯″紡鍒欏敖鍙兘澶氱殑鍖歸厤鎵鎼滅儲鐨勫瓧絎︿覆銆?nbsp; . 鍖歸厤闄?“\n” 涔嬪鐨勪換浣曞崟涓瓧絎︺傝鍖歸厤鍖呮嫭 ’\n’ 鍦ㄥ唴鐨勪換浣曞瓧絎︼紝璇蜂嬌鐢ㄨ薄 ’[ . \ n] ’ 鐨勬ā寮忋?nbsp;( pattern) 鍖歸厤pattern 騫惰幏鍙栬繖涓鍖歸厤銆?nbsp;( ? : pattern) 鍖歸厤pattern 浣嗕笉鑾峰彇鍖歸厤緇撴灉錛屼篃灝辨槸璇磋繖鏄竴涓潪鑾峰彇鍖歸厤錛屼笉榪涜瀛樺偍渚涗互鍚庝嬌鐢ㄣ?nbsp;( ? = pattern) 姝e悜棰勬煡錛屽湪浠諱綍鍖歸厤 pattern 鐨勫瓧絎︿覆寮濮嬪鍖歸厤鏌ユ壘瀛楃涓層傝繖鏄竴涓潪鑾峰彇鍖歸厤錛屼篃灝辨槸璇達紝璇ュ尮閰嶄笉闇瑕佽幏鍙栦緵浠ュ悗浣跨敤銆?nbsp;( ? !pattern) 璐熷悜棰勬煡錛屼笌( ? = pattern) 浣滅敤鐩稿弽 x| y 鍖歸厤 x 鎴?y銆?nbsp; [ xyz] 瀛楃闆嗗悎銆?nbsp;[ ^ xyz] 璐熷煎瓧絎﹂泦鍚堛?nbsp;[ a-z] 瀛楃鑼冨洿錛屽尮閰嶆寚瀹氳寖鍥村唴鐨勪換鎰忓瓧絎︺?nbsp;[ ^ a-z] 璐熷煎瓧絎﹁寖鍥達紝鍖歸厤浠諱綍涓嶅湪鎸囧畾鑼冨洿鍐呯殑浠繪剰瀛楃銆?nbsp;\b 鍖歸厤涓涓崟璇嶈竟鐣岋紝涔熷氨鏄寚鍗曡瘝鍜岀┖鏍奸棿鐨勪綅緗?nbsp; \B 鍖歸厤闈炲崟璇嶈竟鐣屻?nbsp; \cx 鍖歸厤鐢眡鎸囨槑鐨勬帶鍒跺瓧絎︺?nbsp; \d 鍖歸厤涓涓暟瀛楀瓧絎︺傜瓑浠蜂簬 [ 0-9] 銆?nbsp; \D 鍖歸厤涓涓潪鏁板瓧瀛楃銆傜瓑浠蜂簬 [ ^ 0-9] 銆?nbsp; \f 鍖歸厤涓涓崲欏電銆傜瓑浠蜂簬 \x0c 鍜?\cL銆?nbsp; \n 鍖歸厤涓涓崲琛岀銆傜瓑浠蜂簬 \x0a 鍜?\cJ銆?nbsp; \r 鍖歸厤涓涓洖杞︾銆傜瓑浠蜂簬 \x0d 鍜?\cM銆?nbsp; \s 鍖歸厤浠諱綍絀虹櫧瀛楃錛屽寘鎷┖鏍箋佸埗琛ㄧ銆佹崲欏電絳夌瓑銆傜瓑浠蜂簬[ \f\n\r\t\v] 銆?nbsp; \S 鍖歸厤浠諱綍闈炵┖鐧藉瓧絎︺傜瓑浠蜂簬 [ ^ \f\n\r\t\v] 銆?nbsp; \t 鍖歸厤涓涓埗琛ㄧ銆傜瓑浠蜂簬 \x09 鍜?\cI銆?nbsp; \v 鍖歸厤涓涓瀭鐩村埗琛ㄧ銆傜瓑浠蜂簬 \x0b 鍜?\cK銆?nbsp; \w 鍖歸厤鍖呮嫭涓嬪垝綰跨殑浠諱綍鍗曡瘝瀛楃銆傜瓑浠蜂簬’[ A-Za-z0-9_] ’銆?nbsp; \W 鍖歸厤浠諱綍闈炲崟璇嶅瓧絎︺傜瓑浠蜂簬 ’[ ^ A-Za-z0-9_] ’銆?nbsp; \xn 鍖歸厤 n錛屽叾涓?n 涓哄崄鍏繘鍒惰漿涔夊箋傚崄鍏繘鍒惰漿涔夊煎繀欏諱負紜畾鐨勪袱涓暟瀛楅暱銆?nbsp; \num 鍖歸厤 num錛屽叾涓璶um鏄竴涓鏁存暟銆傚鎵鑾峰彇鐨勫尮閰嶇殑寮曠敤銆?nbsp; \n 鏍囪瘑涓涓叓榪涘埗杞箟鍊兼垨涓涓悗鍚戝紩鐢ㄣ傚鏋?\n 涔嬪墠鑷沖皯 n 涓幏鍙栫殑瀛愯〃杈懼紡錛屽垯 n 涓哄悗鍚戝紩鐢ㄣ傚惁鍒欙紝濡傛灉 n 涓哄叓榪涘埗鏁板瓧 ( 0-7) 錛屽垯 n 涓轟竴涓叓榪涘埗杞箟鍊箋?nbsp; \nm 鏍囪瘑涓涓叓榪涘埗杞箟鍊兼垨涓涓悗鍚戝紩鐢ㄣ傚鏋?\nm 涔嬪墠鑷沖皯鏈塱s preceded by at least nm 涓幏鍙栧緱瀛愯〃杈懼紡錛屽垯 nm 涓哄悗鍚戝紩鐢ㄣ傚鏋?\nm 涔嬪墠鑷沖皯鏈?n 涓幏鍙栵紝鍒?n 涓轟竴涓悗璺熸枃瀛?m 鐨勫悗鍚戝紩鐢ㄣ傚鏋滃墠闈㈢殑鏉′歡閮戒笉婊¤凍錛岃嫢 n 鍜?m 鍧囦負鍏繘鍒舵暟瀛?nbsp;( 0-7) 錛屽垯 \nm 灝嗗尮閰嶅叓榪涘埗杞箟鍊?nm銆?nbsp; \nml 濡傛灉 n 涓哄叓榪涘埗鏁板瓧 ( 0-3) 錛屼笖 m 鍜?l 鍧囦負鍏繘鍒舵暟瀛?nbsp;( 0-7) 錛屽垯鍖歸厤鍏繘鍒惰漿涔夊?nml銆?nbsp; \un 鍖歸厤 n錛屽叾涓?n 鏄竴涓敤鍥涗釜鍗佸叚榪涘埗鏁板瓧琛ㄧず鐨刄nicode瀛楃銆?/li> ]]>
linux涓嬩嬌鐢╩ysql鐨凜璇█API http://www.shnenglu.com/lynch/archive/2012/12/15/196331.html钁d笁 钁d笁 Sat, 15 Dec 2012 14:54:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/15/196331.html http://www.shnenglu.com/lynch/comments/196331.html http://www.shnenglu.com/lynch/archive/2012/12/15/196331.html#Feedback 1 http://www.shnenglu.com/lynch/comments/commentRss/196331.html http://www.shnenglu.com/lynch/services/trackbacks/196331.html 闃呰鍏ㄦ枃 ]]> 璁〤++鏀寔interface http://www.shnenglu.com/lynch/archive/2012/12/14/196250.html钁d笁 钁d笁 Fri, 14 Dec 2012 06:21:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/14/196250.html http://www.shnenglu.com/lynch/comments/196250.html http://www.shnenglu.com/lynch/archive/2012/12/14/196250.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/196250.html http://www.shnenglu.com/lynch/services/trackbacks/196250.html 鍦ㄦ棰樼殑灞曞紑鍓嶏紝鎴戜滑鍏堟潵鐪嬩竴孌礐++浠g爜錛?/em>class IX { public: virtual void Fx1( ) = 0; virtual void Fx2( ) = 0; } ; 榪欐槸涓孌電畝鍗曠殑鎺ュ彛澹版槑浠g爜錛欼X鏄敤浜庡疄鐜版帴鍙g殑綰娊璞″熀綾匯傜函鎶借薄鍩虹被鎸囩殑鏄粎鍖呮嫭綰櫄鍑芥暟鐨勫熀綾匯傜函铏氬嚱鏁版槸鎸囩敤=0鏍囪鐨勮櫄鍑芥暟錛屾垜浠線寰鎶?0縐頒綔綰櫄鍑芥暟鎸囩ず絎︺?/span> 铏氬熀綾繪槸涓嶈兘瀹炰緥鍖栫殑錛屾崲鍙ヨ瘽璇達紝铏氬熀綾誨彧鏄彁渚涗竴涓猧nterface鐨勫姛鑳斤紝瀹冨茍涓嶅疄鐜拌繖浜涚函铏氬嚱鏁般傝繖璁╂垜浠兂璧稢#/Java璇█閲岄潰鐨刬nterface鍏抽敭瀛楋紝interface鍜宑lass涓嶅悓錛宨nterface浠呮湁鎺ュ彛澹版槑錛岃屼笖鎵鏈夌殑澹版槑榛樿鐨勮闂潈闄愭槸public鑰岄潪private錛岃繖璁╂垜浠彲浠ョ敤C++鐨剆truct鏉ユā鎷焛nterface錛屽洜涓簊truct榛樿鐨勮闂潈闄愪篃鏄痯ublic銆?/div>
璁╂垜浠畝鍗曠殑鍔犱竴涓害瀹氾細
浣跨敤struct鐨勫師鍥犲湪浜巗truct鐨勬垚鍛樺皢鑷姩鍏鋒湁鍏湁鐨勫睘鎬э紝鍥犳涓嶉渶瑕佸彟澶栧湪瀹氫箟鍔犱笂public鍏抽敭瀛椼傚幓鎺塸ublic鍏抽敭瀛楀彲浠ュ噺灝戜竴浜涙販涔便傛牴鎹繖涓害瀹氾紝鎴戜滑寮濮嬬殑浠g爜鍙互閲嶆柊瀹氫箟濡備笅錛?/span>interface IX { virtual void Fx1( ) = 0; virtual void Fx2( ) = 0; } ; 鍙互鐪嬪埌錛屽皯浜唒ublic錛屽噺灝戜簡娣蜂貢銆傚悓鏃秈nterface鍙互閫忛湶鍑猴紝榪欎笉鏄竴涓櫘閫氱殑class錛岃屾槸涓涓帴鍙c?/span>
涓嬮潰鎴戜滑妯℃嫙涓涓湁涓や釜鎺ュ彛鐨勭粍浠禼omponent鐨勭畝鍗曡闂?/div>
/ / Filename: base. hpp#define interface struct / / Filename: IFace. cpp#include< iostream> #include"base.hpp" //鍦╨inux緇堢浠ョ孩鑹叉墦鍗皃Msg瀛楃涓?/li> void trace( const char* pMsg) { std: : cout< < "\033[0;31m" < < pMsg < < "\033[0m" < < std: : endl; } / / Abstract Interfacesinterface IX { virtual void Fx1( ) = 0; virtual void Fx2( ) = 0; } ; interface IY { virtual void Fy1( ) = 0; virtual void Fy2( ) = 0; } ; / / Interface implementationclass CA : public IX, public IY { public : / / Implement interface IX. virtual void Fx1( ) { std: : cout< < "CA::Fx1" < < std: : endl; } virtual void Fx2( ) { std: : cout< < "CA::Fx2" < < std: : endl; } / / Implement interface IY. virtual void Fy1( ) { std: : cout< < "CA::Fy1" < < std: : endl; } virtual void Fy2( ) { std: : cout< < "CA::Fy2" < < std: : endl; } } ; / / clientint main( ) { trace( "Client:Create an instance of the component." ) ; CA * pA = new CA; / / Get an IX pointer IX* pIX = pA; trace( "Client: Use the IX interface." ) ; pIX- > Fx1( ) ; pIX- > Fx2( ) ; / / Get an IY pointer IY* pIY = pA; trace( "Client: Use the IY interface." ) ; pIY- > Fy1( ) ; pIY- > Fy2( ) ; trace( "Client: Delete the component." ) ; return 0; } 紼嬪簭榪愯緇撴灉錛?/span>
]]>C++ libxml2緙栫▼鍩虹(Ubuntu緋葷粺) http://www.shnenglu.com/lynch/archive/2012/12/14/196249.html钁d笁 钁d笁 Fri, 14 Dec 2012 06:08:00 GMT http://www.shnenglu.com/lynch/archive/2012/12/14/196249.html http://www.shnenglu.com/lynch/comments/196249.html http://www.shnenglu.com/lynch/archive/2012/12/14/196249.html#Feedback 1 http://www.shnenglu.com/lynch/comments/commentRss/196249.html http://www.shnenglu.com/lynch/services/trackbacks/196249.html 闃呰鍏ㄦ枃 ]]> Posix Pthread瀛︿範璧勬枡 http://www.shnenglu.com/lynch/archive/2012/11/28/195763.html钁d笁 钁d笁 Wed, 28 Nov 2012 05:21:00 GMT http://www.shnenglu.com/lynch/archive/2012/11/28/195763.html http://www.shnenglu.com/lynch/comments/195763.html http://www.shnenglu.com/lynch/archive/2012/11/28/195763.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/195763.html http://www.shnenglu.com/lynch/services/trackbacks/195763.html https://computing.llnl.gov/tutorials/pthreads/http://www.yolinux.com/TUTORIALS/LinuxTutorialPosixThreads.html
http://www.sourceware.org/pthreads-win32/
]]>璁捐妯″紡鍏ㄨВ鏋?/title> http://www.shnenglu.com/lynch/archive/2011/09/30/157239.html钁d笁 钁d笁 Fri, 30 Sep 2011 08:53:00 GMT http://www.shnenglu.com/lynch/archive/2011/09/30/157239.html http://www.shnenglu.com/lynch/comments/157239.html http://www.shnenglu.com/lynch/archive/2011/09/30/157239.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/157239.html http://www.shnenglu.com/lynch/services/trackbacks/157239.html 闃呰鍏ㄦ枃 ]]> linux涓嬬紪璇戝畨瑁卲rotobuf 銆恥buntu10.04+protobuf-2.4.1.tar.gz銆?/title> http://www.shnenglu.com/lynch/archive/2011/07/31/152129.html钁d笁 钁d笁 Sun, 31 Jul 2011 02:37:00 GMT http://www.shnenglu.com/lynch/archive/2011/07/31/152129.html http://www.shnenglu.com/lynch/comments/152129.html http://www.shnenglu.com/lynch/archive/2011/07/31/152129.html#Feedback 0 http://www.shnenglu.com/lynch/comments/commentRss/152129.html http://www.shnenglu.com/lynch/services/trackbacks/152129.html 闃呰鍏ㄦ枃 ]]>
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