锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲高清在线精品,先锋资源久久,久久中文字幕一区二区三区 http://www.shnenglu.com/Daywei0123/鎶鏈拷姹傚崜瓚?姊︽兂鍒涢犳湭鏉?/description>zh-cn Sat, 11 Oct 2025 06:10:04 GMT Sat, 11 Oct 2025 06:10:04 GMT 60 CMake浣跨敤 http://www.shnenglu.com/Daywei0123/archive/2016/09/11/214272.htmlDaywei Daywei Sun, 11 Sep 2016 14:52:00 GMT http://www.shnenglu.com/Daywei0123/archive/2016/09/11/214272.html http://www.shnenglu.com/Daywei0123/comments/214272.html http://www.shnenglu.com/Daywei0123/archive/2016/09/11/214272.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/214272.html http://www.shnenglu.com/Daywei0123/services/trackbacks/214272.html cmake瀛︿範(fàn)錛堜竴錛夐潤鎬佸簱涓庡姩鎬佸簱鏋勫緩
(.so)鍏變韓搴擄紝shared object錛氳妭鐪佺┖闂達(dá)紝鍦ㄨ繍琛屾椂鍘昏繛鎺ワ紝濡傛灉鎵ц鏈哄櫒涓婃病鏈夎繖浜涘簱鏂囦歡灝變笉鑳芥墽琛屻?br />(.a)闈欐佸簱,archive錛氶潤鎬佸簱鍜岀▼搴忓寲涓轟竴浣擄紝涓嶄細(xì)鍒嗗紑銆?br />閫氳繃 ldd鍛戒護(hù)鍙互鏌ョ湅涓涓彲鎵ц紼嬪簭鎵渚濊禆鐨勭殑鍏變韓搴撱?br />浣跨敤鐜鍙橀噺LD_LIBRARY_DIRECTORY鍙互鎸囧畾鍏變韓搴撲綅緗?/p>
涓銆佺紪璇戝叡浜簱錛? ADD_LIBRARY(hello SHARED ${SHARED_LIBRARY})
浜屻佹坊鍔犻潤鎬佸簱錛?br />ADD_LIBRARY(hello STATIC ${STATIC_LIBRARY}) 鍥犱負(fù)榛樿瑙勫垯鏄笉鑳芥湁鐩稿悓鍚嶅瓧鐨勫叡浜簱涓庨潤鎬佸簱錛屾墍浠ュ綋鐢熸垚闈欐佸簱鐨勬椂鍊欙紙so鍚庣紑錛夛紝鍏變韓搴撲細(xì)琚垹闄わ紝鍥犱負(fù)鍙兘鍏佽涓涓悕瀛楀瓨鍦紝鐩稿悓鍚嶅瓧鐨勪細(xì)琚浛浠o紙hello錛夛紝鎵浠ラ渶瑕侀氳繃SET_TARGET_PROPERTIES()鏉ヨВ鍐寵繖涓棶棰橈紝渚嬪瓙錛?br />SET_TARGET_PROPERTIES(hello_static PROPERTIES OUTPUT_NAME "hello") cmake鍦ㄦ瀯寤轟竴涓猼arget鐨勬椂鍊欙紝浼?xì)鍒犻櫎涔嬪墠鐢熸垚鐨則arget錛屼竴鏍鋒槸閫氳繃璁劇疆SET_TARGET_PROPERTIES(hello PROPERTIES CLEAN_DIRECT_OUTPUT 1)鏉ヨ揪鍒扮洰鐨?br />涓夈佸姩鎬佸簱鐨勭増鏈彿錛?br />鍚屾牱鏄氳繃SET_TARGET_PROPERTIES()鏉ヨ緗?br />SET_TARGET_PROPERTIES(hello PROPERTIES VERSION 1.2 SOVERSION 1) VERSION錛氬姩鎬佸簱鐗堟湰 SOVERSION錛欰PI鐗堟湰 鏈鍚庣敓鎴愮殑緇撴灉鏄細(xì) libhello.so.1.2 libhello.so.1->libhello.so.1.2 libhello.so->libhello.so.1 鍥涖佸畨瑁咃細(xì) INSTALL(TARGETS hello hello_static LIBRARY DESTINATION lib ARCHIVE DESTINATION lib) INSTALL(TARGETS hello.h DESTINATION include/hello) 鍏朵粬甯哥敤鐨勫睘鎬?PERMISSIONS錛氳緗潈闄愶紱RATTERN錛氳緗鍒欒〃杈懼紡
Summary: ADD_LIBRARY()錛氭坊鍔犱竴涓簱錛屽叡浜簱錛岄潤鎬佸簱錛屾ā鍧?br />SET_TARGET_PROPERTIES()錛氳緗緭鍑哄悕縐幫紝鐗堟湰鍙鳳紝瑙e喅鐩稿悓target琚垹闄ょ殑闂 GET_TARGET_PROEERTIES()錛氫笌SET鍔熻兘鐩稿
cmake瀛︿範(fàn)錛堜簩錛夊父鐢ㄥ彉閲忓拰甯哥敤鐜鍙橀噺 涓銆佸彉閲忕殑寮曠敤鏂瑰紡鏄嬌鐢?#8220;${}”錛屽湪IF涓紝涓嶉渶瑕佷嬌鐢ㄨ繖縐嶆柟寮忥紝鐩存帴浣跨敤鍙橀噺鍚嶅嵆鍙? 浜屻佽嚜瀹氫箟鍙橀噺浣跨敤SET(OBJ_NAME xxxx)錛屼嬌鐢ㄦ椂${OBJ_NAME} 涓夈乧make鐨勫父鐢ㄥ彉閲忥細(xì) CMAKE_BINARY_DIR,PROJECT_BINARY_DIR,_BINARY_DIR錛?br />榪欎笁涓彉閲忓唴瀹逛竴鑷達(dá)紝濡傛灉鏄唴閮ㄧ紪璇戯紝灝辨寚鐨勬槸宸ョ▼鐨勯《綰х洰褰曪紝濡傛灉鏄閮ㄧ紪璇戯紝鎸囩殑灝辨槸宸ョ▼緙栬瘧鍙戠敓鐨勭洰褰曘?br />CMAKE_SOURCE_DIR,PROJECT_SOURCE_DIR,_SOURCE_DIR錛?br />榪欎笁涓彉閲忓唴瀹逛竴鑷達(dá)紝閮芥寚鐨勬槸宸ョ▼鐨勯《綰х洰褰曘?br />CMAKE_CURRENT_BINARY_DIR錛氬閮ㄧ紪璇戞椂錛屾寚鐨勬槸target鐩綍錛屽唴閮ㄧ紪璇戞椂錛屾寚鐨勬槸欏剁駭鐩綍 CMAKE_CURRENT_SOURCE_DIR錛欳MakeList.txt鎵鍦ㄧ殑鐩綍 CMAKE_CURRENT_LIST_DIR錛欳MakeList.txt鐨勫畬鏁磋礬寰?br />CMAKE_CURRENT_LIST_LINE錛氬綋鍓嶆墍鍦ㄧ殑琛?br />CMAKE_MODULE_PATH錛氬鏋滃伐紼嬪鏉傦紝鍙兘闇瑕佺紪鍐欎竴浜沜make妯″潡錛岃繖閲岄氳繃SET鎸囧畾榪欎釜鍙橀噺 LIBRARY_OUTPUT_DIR,BINARY_OUTPUT_DIR錛氬簱鍜屽彲鎵ц鐨勬渶緇堝瓨鏀劇洰褰?br />PROJECT_NAME錛氫綘鐚渵~
鍥涖乧make涓皟鐢ㄧ幆澧冨彉閲?br />1.Using $ENV{NAME} : invoke system environment varible. We can use "SET(ENV{NAME} value)" as well. note that the "ENV" without "$". 2.CMAKE_INCLUDE_CURRENT_DIR equal to INCLUDE_DIRECTORY(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
浜斻佸叾浠栫殑鍐呯疆鍙橀噺 1.BUILD_SHARED_LIBS:set the default value when using ADD_LIBRARY() 2.CMAKE_C_FLAGS: set compiler for c language 2.CMAKE_CXX_FLAGS: set compiler for c++ language
鍏佸尯鍒哾ebug鍜宺elease 鍦ㄥ伐紼嬬洰褰曚笅錛宑make -DCMAKE__BUILD_TYPE=DEBUG(RELEASE)錛屽啀鎵цmake
涓冦佹寚瀹氱紪璇?2bit鎴?4bit紼嬪簭 SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32") SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")cmake瀛︿範(fàn)錛堜笁錛夊父鐢ㄦ寚浠?/span>
涓銆佸熀鏈寚浠わ細(xì) INCLUDE_DIRECTORIES(${includedir}) #-I銆?br />LINK_DIRECTORIES(${libdir}) #-L TARGET_LINK_LIBRARIES(helloworld ${linkflags}) #-l ADD_DEFINITIONS(${cflags}) #-D 1銆丄DD_DEFINATIONS錛氬悜C/CPP娣誨姞瀹忓畾涔夛紝鐩稿綋浜巊cc涓殑-D錛屽弬鏁頒箣闂寸敤絀烘牸鍒嗗壊 2銆丄DD_DEPENDICIES(target_name, depend_name)錛氬畾涔塼arget瀵瑰叾浠杢arget鐨勪緷璧栧叧緋?br />3銆丄UX_SOURCE_DIRECTORY(dir VARIBLE)錛氭妸鐩綍涓嬬殑鎵鏈夋簮鏂囦歡淇濆瓨鍦ㄥ彉閲忎腑錛屽熀鏈敤鏉ュ垱寤烘簮鏂囦歡鍒楄〃 4銆丄DD_EXECUTABLE錛氭寚瀹氱洰褰曪紝鐢熸垚鎵ц鏂囦歡 5銆丒XEC_PROGRAM錛氬閮ㄨ皟鐢ㄦ寚浠わ紝鍙Щ鎵ц浠諱綍澶栭儴鍛戒護(hù)錛屽悗闈㈠姞鍙傛暟錛屼緥瀛愬涓嬶細(xì) EXEC_PROGERAM(ls ARGS"*.c" OUTPUT_VARIBLE LS_OUTPUT RETURN_VALUE LS_RVALUE) IF(not LS_RVALUE) MESSAGE(STATUS "xxx") ENDIF(not LS_RVAULE) PS.榪欓噷鎵цls *.c鎸囦護(hù)錛屾墽琛屾垚鍔熺殑璇濓紝榪斿洖0銆?br />6銆丗ILE鎸囦護(hù)錛?br />FILE(WRITE file_name "content") FILE(APPEND file_name "content") FILE(READ file_name varible) FILE(WRITE file_name "content") 7銆丗IND_緋誨垪鎸囦護(hù)錛?br />LIBRARY( name path)錛?br />FIND_LIBRARY(Xorg X11 /usr/lib64) IF(not Xorg) MESSAGE(STATUS "no Xorg") ENDIF(not Xorg) FILE( name path) PATH( name path) PROGRAM( name path) PACKAGE( [major.minor][QUIET][NO MODULE][[REQUIRED][COMPONTS][componts....]]) 鏈鍚庝竴鏉★紝鐢ㄦ潵璋冪敤鏀懼湪CMAKE_MODULE_PATH涓嬬殑Find.cmake妯″潡錛屼篃鍙互鑷畾涔塅ind妯″潡 棣栧厛閫氳繃SET(CMAKE_MODULE_PATH /home/...)鏉ユ寚瀹氫綅緗?/p>
8銆佹帶鍒舵寚浠わ細(xì) IF(expression)錛孍LSE(expression)錛孍NDIF(expression) express涓句緥錛?br />鍚﹀畾錛氱┖錛?錛孨錛孨O錛孫FF錛孎ALSE錛孨OTFOUND鎴朹NOTFOUND 鑲畾錛欳OMMAND cmd錛孍XISTS dir/file錛寁ariable MARCHES regex絳夌瓑絳夌瓑榪樻湁寰堝~~~闅忕敤闅忔煡鍚?/p>
cmake瀛︿範(fàn)錛堝洓錛夋ā鍧楃殑浣跨敤鍜岃嚜瀹氫箟妯″潡
FIND_PACKAGE 姣忎竴涓ā鍧楅兘浼?xì)漶旂敓濡備笅鍙橀?br />_FOUND _INCLUDE_DIR _LIBRARY or _LIBRARIES 濡傛灉_FOUND涓虹湡錛屾妸_INCLUDE_DIR鍔犲叆鍒癐NCLUDE_DIRECTORIES涓紝_LIBRARY鍔犲叆鍒癟ARGET_LINK_LIBRARIES涓?/p>
緙栧啓灞炰簬鑷繁鐨凢indHello妯″潡錛?br />1.FIND_PATH(HELLO_INCLUDE_DIR hello.h /usr/include/hello /usr/local/include/hello) 2.FIND_LIBRARY(HELLO_LIBRARY_DIR NAMES hello PATH /usr/lib /usr/local/lib) IF(HELLO_INCLUDE_DIR AND HELLO_LIBRARY) SET(HELLO_FOUND TRUE) ENDIF(HELLO_INCLUDE_DIR) 3.FIND_PACKAGE([major.minor][QUIET][NO_MODULE] [[REQUIRED|COMPONENTS][componets...]]) QUIET鍙傛暟錛氬幓鎺夎緭鍑轟俊鎭?br />REQUIRED鍙傛暟錛氬叡浜簱鏄惁鏄伐紼嬪繀欏葷殑錛屽鏋滄槸蹇呴』鐨勶紝閭d箞鎵句笉鍒?br />濡傛灉鍦╯rc涓兂璋冪敤hello妯″潡涓殑鍐呭 FIND_PACKAGE(HELLO) 涓轟簡鍙互璁╁伐紼嬫壘鍒癋indHELLO.cmake 鍦ㄤ富宸ョ▼鐨凜MakeList.txt涓紝SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_PATH}/cmake) 閫氳繃璁劇疆FIND_PACKAGE(HELLO QUIET)鍙互鍘繪帀杈撳嚭淇℃伅Cmake CMAKE_BUILD_TYPE specification
That’s because no build type has been specified to CMake. The build type is a feature most IDE have, it allows you to compile your program in “debug” mode, for easily single-stepping through it with a debugger, or in “release” mode, with speed optimization enabled.
To fix this you simply need to specify a build type in the CMakeLists.txt file, in this way:
if( NOT CMAKE_BUILD_TYPE )
set( CMAKE_BUILD_TYPE Debug CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo
MinSizeRel."
FORCE )
endif()
when cmake is run without specifying the build type using -D CMAKE_BUILD_TYPE, it is the Debug mode that is selected as the default.
]]>SDL璁よ瘑 http://www.shnenglu.com/Daywei0123/archive/2016/06/28/213813.htmlDaywei Daywei Mon, 27 Jun 2016 16:17:00 GMT http://www.shnenglu.com/Daywei0123/archive/2016/06/28/213813.html http://www.shnenglu.com/Daywei0123/comments/213813.html http://www.shnenglu.com/Daywei0123/archive/2016/06/28/213813.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/213813.html http://www.shnenglu.com/Daywei0123/services/trackbacks/213813.html 鐒跺悗璇磋浠庝釜浜鴻搴︿笂鐪婼DL鐨勭壒鐐廣?br />1.璺ㄥ鉤鍙般?/strong>紜‘瀹炲疄鏄法浜哊涓鉤鍙幫紝鐢氳嚦鍖呮嫭NDS榪欑騫沖彴銆傛湁浜哠DL錛屼綘鐢氳嚦鍙互鍦╳indows銆乴inux銆丄ndroid涓婁換鎰忕Щ妞嶄綘鐨勬父鎴忋傚綋鐒?dòng)灱屽墠鎻愭槸浣犵洰鏍囼q沖彴鐨勭紪璇戝櫒璁よ瘑浣犵殑浠g爜(錕?#9661;錕?”銆傛湁浜哠DL娉ョ敋鑷沖彲浠ュ彧鐢╟璇█寮鍙戝畨鍗撴父鎴忓摕銆?br />2.寮婧愩?/strong>3.SDL2.0緇樺浘鏁堢巼寰堥珮 銆備簨瀹炰笂鐩歌緝涔婼DL1.2鎴戜釜浜烘瘮杈冨枩嬈DL2.0鐨勫師鍥犱篃鏄湪姝ゃ備釜浜烘劅瑙夛紙鍏跺疄鎴戞病鐪嬭繃婧愮爜錛塖DL1.2搴旇鏄釜璺熷綋騫寸殑DirectDraw宸笉澶氱殑涓滆タ錛屽儚绱犲~鍏呬粈涔堢殑錛屾湁鐩稿綋紼嬪害涓婃槸瑕佺(CPU鐨勩傝孲DL2.0浠庣粯鍥炬柟寮忎笂灝遍潻鏂頒簡錛屾姏寮冧簡涔嬪墠鐨剆urface涓巆lip鐨勬ā寮忥紝鎶婂疄闄呯粯鍒剁殑涓滆タ鏀逛負(fù)浜員exture錛岃屾妸涔嬪墠鐨剆urface鏀逛負(fù)浜嗗垱寤篢exture鐨勪竴涓復(fù)鏃剁幆鑺傘傝宼exure錛岄【鍚嶆濅箟錛屽叾瀹炲氨鏄疍irectX銆丱penGL榪欎簺搴曞眰鐨?D紜歡鍔犻烝PI鐨勮創(chuàng)鍥俱?br /> 褰撲笅DirectX銆丱penGL鏍囧噯涓嬬殑鏄懼崱鐨勬覆鏌撶綰挎棤闈炲氨鏄細(xì)1.鎶婇《鐐癸紙鍙互鐞嗚В鎴愬潗鏍囷級浼犵粰鏄懼崱 銆?.鎶妕exture浼犵粰鏄懼崱銆?3.鍛婅瘔鏄懼崱鎬庝箞澶勭悊榪欎簺鏁版嵁錛坰hader錛夈?4.鏄懼崱鎶婁笢瑗跨粰浣犳樉紺哄嚭鏉ャ傝屽熀浜嶥irectX銆丱penGL(縐誨姩騫沖彴鏄疧penGL ES)鐨凷DL2.0錛屾鏄伆濂藉湴鍒╃敤浜嗗綋涓嬫樉鍗$殑鑳藉姏銆?br />4.SDL鍙互鐢ㄤ綔3D鍥懼儚寮曟搸鍜屽簳灞侱irectX/OpenGL API鐨勪腑闂村眰 銆傚綋鐒?dòng)灱屽叾瀹炲鏋滄妸SDL榪欐牱鐢ㄧ殑璇濓紝閭e氨鐪熸槸寰堣杽鐨勪竴灞備簡錛氾級5.鏄撶敤 銆傝繖鏄浉瀵硅岃█鐨勶紝姣斿鍦╳indows涓婏紝浣犵敤浜哠DL榪欎釜搴撲箣鍚庯紝鍩烘湰灝變笉鐢ㄥ幓鐞嗕細(xì)Windows閭d簺鍙堣嚟鍙堥暱鐢ㄤ笉鐫鐨勫弬鏁板張澶氱殑API浜嗐傛垜涓嶆槸鍦ㄨ璁轟俊浠伴棶棰樹篃涓嶆槸瑕佽瘚姣亀indows錛屾垜鏄湪瀹㈣闄堣堪windows api閭d釜瑕佸垵濮嬪寲涓涓獥鍙e繀欏昏鍫?00琛屼唬鐮佺殑璁懼畾瀹炲湪鏄墦鍑誨垵瀛﹁呯Н鏋佹х殑浜嬪疄銆?br />SDL_image銆丼DL_ttf銆丼DL_mixer銆丼DL_net 澶栭儴鎵╁睍搴擄紝涔熸槸涓嶉敊鐨勯夋嫨銆?/span> 鎬ц兘娌℃湁嫻嬭瘯錛屼粎浠庡啓浠g爜瑙掑害涓婃潵璇達(dá)紝涓漢鎰熻2.0灝嗘搷浣滅粰寮勫緱澶嶆潅浜嗐?br /> 1.2--------------------------------------- 鍙湁SDL_Surface鐨勬蹇碉紝灞忓箷鏄痵urface錛屽浘鐗囷紝鏂囧瓧絳夐兘鏄痵urface錛?br />鍙灝嗗噯澶囧ソ鐨勫悇縐嶅浘鐗囷紝璐村埌灞忓箷閲屽幓(SDL_BlitSurface)錛涘啀鍒蜂竴涓嬪睆騫?SDL_Flip鍏ㄥ眬鐨勩佹垨SDL_UpdateRect灞閮ㄧ殑)灝眔k浜嗐傘傘?br /> SDL_Init(SDL_INIT_EVERYTHING); SDL_Surface* screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE); SDL_Surface* bmp = SDL_LoadBMP("back.bmp"); SDL_BlitSurface(bmp, 0, screen, 0); SDL_Flip(screen); while(SDL_WaitEvent(&e)) { switch(e.type) { case SDL_QUIT: return; } } SDL_Quit(); 2.0--------------------------------------- 鏁村嚭浜哠DL_Window,SDL_Renderer,SDL_Texture鏂扮殑3涓笢瑗褲?br />騫朵笖鎴戣鐢諱竴寮犲浘錛屽厛瑕佸緱鍒皊urface錛岀劧鍚庤漿鎹負(fù)texture錛屽啀涓存椂璐村埌renderer錛屾渶鍚庢墠鍒峰睆銆?br /> SDL_Init(SDL_INIT_EVERYTHING); SDL_Window* window = SDL_CreateWindow("hello", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN); SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); SDL_Surface* surface = SDL_LoadBMP("back.bmp"); SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, surface); SDL_RenderClear(renderer); SDL_RenderCopy(renderer, texture, 0, 0); SDL_RenderPresent(renderer); while(SDL_WaitEvent(&e)) { switch(e.type) { case SDL_QUIT: return; } } SDL_Quit(); 鍏跺疄錛屾垜鐪熷績涓嶈寰楁彁鍑篠DL_Window,SDL_Renderer,SDL_Texture榪欎簺姒傚康鍏堣繘鎬у湪鍝噷錛熷彲鑳芥槸涓巓penGL鐨勬蹇典繚鎸佷竴鑷村惂銆?br />鑰屼笖浠庣淮鎶ょ殑瑙掑害鍑哄彂錛屼笉綆dl2.0鎬ц兘鎻愬崌浜嗗灝戯紝濡傛灉鎺ュ彛鏈韓涓嶉渶瑕佹敼鍔紝涓嶆槸鏇村姞濂戒箞錛?br /> --------------------------------------------- 鏈鍚庢垜鍙戠幇錛屽悓鏍鋒槸娓叉煋鐨勭獥鍙?br />1.2鐢⊿DL_Flip(screen);涔嬪悗琚叾浠栫獥鍙f尅浣忎箣鍚庯紝鍥炴潵鐢婚潰榪樻槸鍦ㄧ殑錛?br />2.0鐢⊿DL_RenderPresent(renderer);涔嬪悗琚叾浠栫獥鍙f尅浣忎箣鍚庯紝鍥炴潵鐢婚潰灝變笉鍦ㄤ簡錛? ]]> OpenCV 浣跨敤闂璁板綍 http://www.shnenglu.com/Daywei0123/archive/2015/12/06/212423.htmlDaywei Daywei Sun, 06 Dec 2015 04:20:00 GMT http://www.shnenglu.com/Daywei0123/archive/2015/12/06/212423.html http://www.shnenglu.com/Daywei0123/comments/212423.html http://www.shnenglu.com/Daywei0123/archive/2015/12/06/212423.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/212423.html http://www.shnenglu.com/Daywei0123/services/trackbacks/212423.html 闃呰鍏ㄦ枃 ]]> SQL浣跨敤璁板綍 http://www.shnenglu.com/Daywei0123/archive/2015/03/17/210079.htmlDaywei Daywei Tue, 17 Mar 2015 07:43:00 GMT http://www.shnenglu.com/Daywei0123/archive/2015/03/17/210079.html http://www.shnenglu.com/Daywei0123/comments/210079.html http://www.shnenglu.com/Daywei0123/archive/2015/03/17/210079.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/210079.html http://www.shnenglu.com/Daywei0123/services/trackbacks/210079.html 闃呰鍏ㄦ枃 ]]> Exceptional C++ 璇諱功絎旇2 http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208095.htmlDaywei Daywei Fri, 22 Aug 2014 07:00:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208095.html http://www.shnenglu.com/Daywei0123/comments/208095.html http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208095.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/208095.html http://www.shnenglu.com/Daywei0123/services/trackbacks/208095.html 濡傛灉鍙渶瑕佹祦鐨勫墠緗0鏄庯紝搴旇浼樺厛浣跨敤#include<iosfwd> 鍙渶瑕佸墠緗0鏄庢椂錛岀粷涓嶈鐢?include鍖呭惈鐩稿簲鐨勫ご鏂囦歡銆?br /> 濡傛灉浣跨敤鑱氬悎鍏崇郴灝卞凡緇忚凍澶燂紝灝變笉瑕佷嬌鐢ㄧ戶鎵褲?br /> 瑕侀伩鍏嶄嬌鐢ㄥ唴鑱旀垨鑰呭鏉傜殑璋冩暣鏂規(guī)硶錛岄櫎闈為氳繃鎬ц兘鍒嗘瀽璇佹槑榪欑‘瀹炴槸蹇呰鐨勩?br /> 姝g‘浣跨敤鍚嶅瓧絀洪棿銆傚鏋滃皢涓涓被鏀懼叆鍚嶅瓧絀洪棿錛岄偅涔堝悓鏃惰淇濊瘉灝嗚繖涓被鐨勬墍鏈夎緟鍔╁嚱鏁板拰榪愮畻絎﹀嚱鏁頒篃鏀懼叆鐩稿悓鐨勫悕瀛楃┖闂淬傚惁鍒欙紝浣犲皢鍦ㄤ唬鐮佷腑鍙戠幇濂囨殑緇撴灉銆?img border="0" alt="" src="http://www.shnenglu.com/images/cppblog_com/daywei0123/鍐呭瓨鍖哄煙.jpg" width="1708" longdesc="" height="2000" /> 瑕佺悊瑙h繖浜旂涓嶅悓綾誨瀷鐨勫唴瀛橈紝浜嗚В浠栦滑涓轟粈涔堟槸涓嶅悓鐨勶紝浠ュ強(qiáng)浠栦滑鍚勮嚜鐨勮涓哄張鏄庝箞鏍鳳細(xì)鏍堬紙鑷姩鍙橀噺錛夈佽嚜鐢卞瓨鍌紙new/delete錛夈佸爢錛坢alloc/free錛夈佸叏灞錛堥潤鎬佸彉閲忋佸叏灞鍙橀噺銆佹枃浠朵綔鐢ㄥ煙鍙橀噺絳夛級銆佸父閲忔暟鎹紙瀛楃涓插父閲忕瓑錛夈?br /> 浼樺厛浣跨敤鑷敱瀛樺偍錛坣ew/delete錛夛紝閬垮厤浣跨敤鍫嗭紙malloc/free錛夈?br /> 瀵逛簬“鍫?#8221;鍜?#8220;鑷敱瀛樺偍”榪涜鍖哄垎錛岃繖涓鐐瑰緢閲嶈錛屽洜涓哄湪C++鏍囧噯涓湁鎰忛伩寮浜嗚繖涓ょ綾誨瀷鐨勫唴瀛樻槸涓嶆槸鐩稿叧鐨勮繖涓棶棰樸備緥濡傦紝褰撻氳繃錛氾細(xì)operator delete()鍑芥暟鏉ラ噴鏀懼唴瀛樻椂錛屽湪C++鏍囧噯鐨?8.4.1.1涓紝鏈鍚庝竴欏規(guī)槸榪欐牱鐨勶細(xì) “ 鍦–++鏍囧噯涓茍娌℃湁瑙勫畾錛屽湪鍝簺鎯呭喌涓嬶紝鍦ㄩ氳繃operator delete鍥炴敹鐨勫瓨鍌ㄧ┖闂翠腑錛屾湁涓閮ㄥ垎鎴栬呭叏閮ㄧ殑鎺т歡鍙互鍐嶉殢鍚庤皟鐢╫perator new鎴栬卌alloc錛宮alloc浠ュ強(qiáng)realloc絳夊嚱鏁版椂琚噸鏂板垎閰嶏紝榪欎簺鍑芥暟鐨勫0鏄庢椂鍦?lt;cstdlib>涓?#8221; 鑰屼笖錛屽湪C++鏍囧噯涓篃娌℃湁瑙勫畾錛宯ew/delete鏄惁闇瑕侀氳繃malloc/free鏉ュ疄鐜般備笉榪囷紝鍦–++鏍囧噯20.4.6鑺傜殑絎?孌靛拰絎?孌典腑瑙勫畾浜嗭紝malloc/free涓瀹氫笉鑳戒嬌鐢╪ew/delete鏉ュ疄鐜幫細(xì)“calloc銆乵alloc鍜宺ealloc鍑芥暟涓嶄細(xì)閫氳繃璋冪敤::operator new()鏉ュ垎閰嶅瓨鍌ㄧ┖闂淬傚嚱鏁癴ree錛堬級涓嶄細(xì)閫氳繃璋冪敤::operator delete() 鏉ラ噴鏀懼唴瀛樸?#8221; 濡傛灉鍦ㄧ被涓畾涔変簡new鍜宒elete涓殑浠繪剰涓涓繍綆楃鍑芥暟錛岄偅涔堜竴瀹氳鍚屾椂瀹氫箟鍙﹀涓涓?br /> 閫氬父搴旇鏄懼紡鍦板皢鍑芥暟operator new ()鍜宱perator delete()澹版槑涓洪潤鎬佸嚱鏁般備粬浠案榪滈兘涓嶈兘浣塊潪闈欐佹垚鍛樺嚱鏁般?br /> 姘歌繙閮戒笉瑕侀氳繃澶氭佺殑鏂瑰紡澶勭悊鏁扮粍銆?br /> 浼樺厛閫夋嫨浣跨敤vector鎴栬卍eque錛岃屼笉鏄暟緇勩?br /> 鍦ㄧ紪鍐欐嫹璐濊祴鍊艱繍綆楃鍑芥暟鏃訛紝姘歌繙閮戒笉瑕佹寚鏈涜兘澶熼氳繃瀵硅嚜鎴戣祴鍊艱繘琛屾嫻嬫潵淇濊瘉鍑芥暟鐨勬紜э紱搴旇鍦ㄦ嫹璐濊祴鍊艱繍綆楃鍑芥暟涓嬌鐢?#8220;鍒涘緩涓存椂瀵硅薄騫惰繘琛屼氦鎹?#8221;鐨勬儻鐢ㄦ硶錛岃繖縐嶆柟娉曚笉浠呮槸寮傚父瀹夊叏鐨勶紝鑰屼笖鍦ㄥ鐞嗚嚜鎴戣祴鍊兼椂涔熸槸瀹夊叏鐨勩?br /> 鍙互灝嗚嚜鎴戣祴鍊兼嫻嬩綔涓轟竴縐嶄紭鍖栨墜孌碉紝浠ラ伩鍏嶄笉蹇呰鐨勫伐浣滐紝榪欐槸姝g‘鍦板仛娉曘?br /> 涓嶄粎瑕侀伩鍏嶇紪鍐欑被鍨嬭漿鎹㈣繍綆楃鍑芥暟錛岃屼笖榪樿閬垮厤緙栧啓闅愬紡鐨勬瀯閫犲嚱鏁般?br /> 灝介噺緙栧啓寮傚父瀹夊叏鐨勪唬鐮併傚湪緙栧啓浠g爜鏃跺簲璇ュ緇堥伒寰細(xì)鍗充嬌鍦ㄥ嚭鐜板紓甯告椂錛岃祫婧愪粛鐒惰兘澶熻姝g‘鍦伴噴鏀撅紝騫朵笖鏁版嵁涔熸繪槸澶勪簬涓鑷寸殑鐘舵併?br /> 閬垮厤浣跨敤璇█涓偅浜涗笉甯哥敤鐨勭壒鎬э紝鑰屽簲璇ヤ嬌鐢ㄦ渶綆鍗曞茍涓旀湁鏁堢殑鎶鏈?br /> 鎷瘋礉鍒濆鍖栬繃紼嬬粷涓嶆槸璧嬪艱繃紼嬶紝鍥犳鍦ㄥ垵濮嬪寲涓案榪滈兘涓嶄細(xì)璋冪敤鍑芥暟T::operator=()銆傛槸鐨勶紝鎴戠煡閬撳湪鍒濆鍖栬鍙ヤ腑鏈変竴涓?#8220;=”絎﹀悎錛屼絾涓嶈琚畠榪鋒儜銆傚畠鍙槸浠嶤璇█涓部鐢ㄨ繃鏉ョ殑涓縐嶈娉曪紝騫朵笉浠h〃璧嬪艱繍綆椼?br /> 濡傛灉鍙兘鐨勮瘽錛屼紭鍏堜嬌鐢?#8220;T t(u);”榪欑褰㈠紡錛岃屼笉鏄?#8220;T t=u;”鐨勫艦寮忋傞氬父錛岃兘鑳藉鏃跺欏悗鑰呯殑鍦版柟錛岄兘鍙互浣跨敤鍓嶈咃紝騫朵笖浣跨敤鍓嶈呰繕鏈夋洿澶氱殑濂藉——渚嬪錛屽彲浠ュ甫澶氫釜鍙傛暟銆?br /> 鍦ㄥ嚱鏁板0鏄庝腑錛屽鏋滃弬鏁版槸浠ヤ紶鍊兼柟寮忔潵浼犻掔殑錛屽垯涓嶈浣跨敤const銆傝屽鏋滃湪榪欎釜鍑芥暟鐨勫畾涔変腑錛屽弬鏁版槸涓嶈兘琚慨鏀圭殑錛岄偅涔堝簲璇ヤ嬌鐢╟onst銆?br /> 瀵逛簬涓嶆槸鍐呯疆綾誨瀷鐨勮繑鍥炲兼潵璇達(dá)紝褰撲嬌鐢ㄨ繑鍥炲肩殑鏂瑰紡鑰屼笉鏄繑鍥炲紩鐢ㄧ殑鏂瑰紡鏃訛紝搴旇浼樺厛閫夋嫨榪斿洖const鍊箋?br /> const 鍜宮utable閮芥槸浣犵殑鏈嬪弸 浼樺厛浣跨敤鏂板艦寮忕殑綾誨瀷杞崲銆?br /> 涓嶈閫氳繃綾誨瀷杞崲鍘繪帀甯擱噺灞炴э紝鑰屽簲璇ヤ嬌鐢╩utable銆?br /> 閬垮厤浣跨敤鍚戜笅鐨勭被鍨嬭漿鎹€?br /> 浼樺厛閫氳繃寮曠敤鏂瑰紡鏉ヤ紶閫掑璞″弬鏁幫紝鑰屼笉鏄紶鍊兼柟寮忥紝騫朵笖鍦ㄦ墍鏈夊彲鑳界殑鍦版柟閮戒嬌鐢╟onst銆?br /> 閬垮厤浣跨敤鍐呰仈錛岄櫎闈炰粠鎬ц兘鐨勫垎鏋愪笂鏉ョ湅紜疄鏈夊繀瑕佽繖涔堝仛銆?br /> 閬垮厤浣跨敤鍏ㄥ眬鍙橀噺鎴栬呴潤鎬佸彉閲忋傚鏋滃繀欏諱嬌鐢紝閭d箞涓瀹氳鐗瑰埆娉ㄦ剰榪欎簺鍙橀噺鐨勫垵濮嬪寲欏哄簭銆?br /> 鍦ㄦ瀯閫犲嚱鏁扮殑鍒濆鍖栧垪琛ㄤ腑錛屽簲璇ユ妸 鍩虹被鎸夌収浠栦滑鍦ㄧ被瀹氫箟涓嚭鐜扮殑鍏堝悗欏哄簭榪涜鎺掑垪銆?br /> 鍦ㄧ紪鍐欎唬鐮佹椂錛屾案榪滈兘涓嶅簲璇ヤ緷璧栧嚱鏁板弬鏁扮殑姹傚奸『搴?img src ="http://www.shnenglu.com/Daywei0123/aggbug/208095.html" width = "1" height = "1" /> ]]>Exceptional C++ 璇諱功絎旇1 http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208093.htmlDaywei Daywei Fri, 22 Aug 2014 03:50:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208093.html http://www.shnenglu.com/Daywei0123/comments/208093.html http://www.shnenglu.com/Daywei0123/archive/2014/08/22/208093.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/208093.html http://www.shnenglu.com/Daywei0123/services/trackbacks/208093.html 緇濆涓嶈瀵規(guī)棤鏁堢殑榪唬鍣ㄦ墽琛岃В寮曠敤錛坉ereference錛夋搷浣?br /> 鐢ㄤ簬涓嶈灝嗗紓甯稿畨鍏ㄦф斁鍦ㄤ簨鍚庤冭檻銆傚紓甯稿畨鍏ㄦт細(xì)褰卞搷鍒扮被鐨勮璁°傚畠姘歌繙閮戒笉浼?#8220;鍙槸涓涓疄鐜扮粏鑺?#8221;銆?br /> 鍦ㄤ紶閫掑璞″弬鏁版椂錛岄夋嫨const&鏂瑰紡鑰屼笉鏄紶鍊兼柟寮忋?br /> 瀵逛簬紼嬪簭榪愯涓笉浼?xì)鏀瑰彉鐨勫鹼紝搴旇棰勫厛璁$畻騫朵繚瀛樿搗鏉ュ鐢紝鑰屼笉鏄噸澶嶅湴鍒涘緩瀵硅薄錛岃繖鏄病鏈夊繀瑕佺殑銆?br /> 閫氬父錛屼負(fù)浜嗕繚鎸佷竴鑷存э紝搴旇浣跨敤鍓嶇疆閫掑鏉ュ疄鐜板悗緗掑錛屽惁鍒欙紝褰撳叾浠栫敤鎴峰湪浣跨敤浣犵殑綾繪椂錛屽彲鑳戒細(xì)寰楀埌濂囨粨鏋溿?br /> 浼樺厛閫夋嫨浣跨敤鍓嶇疆閫掑銆傚彧鏈夊湪闇瑕佸垵濮嬪兼椂錛屾墠浣跨敤鍚庣疆閫掑銆?br /> 鍦ㄨ繘琛岄殣寮忕被鍨嬭漿鎹㈡椂錛岃娉ㄦ剰鍦ㄨ漿鎹㈣繃紼嬩腑鍒涘緩鐨?涓存椂瀵硅薄銆傝閬垮厤榪欎釜闂錛屼竴涓ソ鍔炴硶灝辨槸灝藉彲鑳藉湴閫氳繃鏄懼紡鐨勬柟寮忔潵鏋勯犲璞★紝騫墮伩鍏嶇紪鍐欑被鍨嬭漿鎹㈣繍綆楃銆?br /> 璁頒綇瀵硅薄鐨勭敓瀛樻湡銆傛案榪滐紝姘歌繙錛屾案榪滈兘涓嶈榪斿洖鎸囧悜灞閮ㄥ璞$殑鎸囬拡鎴栧紩鐢紱瀹冧滑娌℃湁浠諱綍鐢ㄥ錛屽洜涓轟富璋冧唬鐮佹棤娉曡窡韙畠浠殑鏈夋晥鎬э紝浣嗗嵈鍙兘浼?xì)璇曞浘杩欎箞鍋氥?br /> 灝藉彲鑳藉湴閲嶇敤浠g爜——灝ゅ叾鏄爣鍑嗗簱涓殑浠g爜——鑰屼笉鏄嚜宸卞幓緙栧啓浠g爜錛岃繖鏍鋒洿蹇佹洿瀹規(guī)槗錛屼篃鏇村畨鍏ㄣ?br /> 濡傛灉鍦ㄥ嚱鏁頒腑涓嶆墦綆楀鐞嗘墍鎶涘嚭鐨勫紓甯革紝閭d箞搴旇灝嗗紓甯歌漿鍙戠粰鑳藉榪涜澶勭悊鐨勪笂灞傝皟鐢ㄨ呫?br /> 鍦ㄧ紪鍐欎唬鐮佹椂搴旇濮嬬粓閬靛驚錛氬嵆浣垮湪鍑虹幇寮傚父鏃訛紝璧勬簮浠嶇劧鑳藉琚紜湴閲婃斁錛屽茍涓旀暟鎹篃鎬繪槸澶勪簬涓鑷寸殑鐘舵併?br /> 閬靛驚鏍囧噯鐨勫紓甯稿畨鍏ㄨ鍒欙細(xì)姘歌繙涓嶈鍦ㄦ瀽鏋勫嚱鏁般侀噸杞借繍綆楃鍑芥暟operator delete()鎴栬卭perator delete[]()涓姏鍑哄紓甯革紱 鍦ㄧ紪鍐欐瘡涓瀽鏋勫嚱鏁板拰鍐呭瓨閲婃斁鍑芥暟鏃訛紝瑕佸亣璁懼瓨鍦ㄧ潃“throw()”榪欐牱鐨勫紓甯歌鑼冦?br /> 閬靛驚鏍囧噯鐨勫紓甯稿畨鍏ㄦц鍒欙細(xì)鍦ㄦ瘡涓嚱鏁頒腑錛岃灝嗘墍鏈夊彲鑳戒細(xì)鎶涘嚭寮傚父鐨勪唬鐮佸崟鐙斁鍦ㄤ竴璧鳳紝騫朵笖瀵硅繖浜涗唬鐮佽繘琛屽畨鍏ㄥ鐞嗐傜劧鍚庯紝褰撲綘紜榪欎簺浠g爜鎵ц鐨勫伐浣滈兘宸茬粡鎴愬姛鍦板畬鎴愭椂錛屾墠鍙互浣跨敤涓嶄細(xì)鎶涘嚭寮傚父鐨勬搷浣滄潵淇敼紼嬪簭鐨勭姸鎬併?br /> 姘歌繙閮戒笉瑕佸埌鏈鍚庢墠瀹炵幇寮傚父瀹夊叏鎬с傚紓甯稿畨鍏ㄦт細(xì)瀵圭被鐨勮璁′駭鐢熷獎(jiǎng)鍝嶃傚畠姘歌繙閮戒笉浼?#8220;鍙槸涓涓疄鐜扮粏鑺?#8221;銆?br /> 浼樺厛鑰冭檻瀹炵幇鍐呰仛銆傝鍔姏浣挎瘡孌典唬鐮?#8212;—姣忎釜妯″潡銆佹瘡涓被銆佹瘡涓嚱鏁?#8212;—閮藉彧鏈夊崟涓鐨勶紝騫朵笖鏄槑紜畾涔夌殑鍔熻兘銆?br /> “寮傚父涓嶅畨鍏?#8221;鎬繪槸涓?#8220;鎷欏姡鐨勮璁?#8221;緇撲即鐨勩傚鏋滅▼搴忕殑璁捐閫昏緫娓呮櫚錛岄偅涔堝嵆浣挎湁涓孌典唬鐮佷笉鏄紓甯稿畨鍏ㄧ殑錛屼竴鑸潵璇翠篃涓嶄細(xì)鏈夊お澶ч棶棰橈紝騫朵笖鍙互寰堢畝鍗曞湴榪涜淇銆備絾濡傛灉鏈変竴孌典唬鐮佺敱浜庤璁¢棶棰樿屼笉鑳借緙栧啓鎴愬紓甯稿畨鍏ㄧ殑錛屾垜浠氬父閮戒細(xì)璁や負(fù)榪欎釜璁捐鏃舵嫏鍔g殑銆備笅闈㈡槸涓や釜鎷欏姡璁捐鐨勭ず渚嬨?br />紺轟緥1錛氬鏋滃湪涓涓嚱鏁頒腑闇瑕佸疄鐜頒袱涓笉鍚岀殑鍔熻兘錛岄偅涔堣繖涓嚱鏁板緢闅捐緙栧啓鎴愬紓甯稿畨鍏ㄧ殑銆?br />紺轟緥2錛氬鏋滃湪鎷瘋礉璧嬪艱繍綆楃鍑芥暟涓繀欏誨鑷垜璧嬪艱繘琛屾嫻嬶紝閭d箞榪欎釜鍑芥暟涔熷彲鑳戒笉鏄畬鍏ㄥ紓甯稿畨鍏ㄧ殑 閬靛驚鏍囧噯鐨勫紓甯稿畨鍏ㄦц鍒欙細(xì)浠?#8220;鑾峰緱璧勬簮涔熷氨鎰忓懗鐫鍒濆鍖?#8221;榪欑妯″紡鏉ュ垎紱昏祫婧愮殑鎵鏈夋潈鍜岃祫婧愮殑綆$悊鏉冦?br /> 鍦ㄨ繘琛岃璁′腑錛岃濮嬬粓鐗㈣閲嶇敤鎬с?br /> 浼樺厛閲囩敤“ a op=b;”榪欑鍐欐硶錛岃屼笉鏄?a = a op b;"錛堣繖閲岀殑op琛ㄧず鏌愪釜榪愮畻絎︼級銆傝繖縐嶅啓娉曟洿涓烘竻鏅幫紝鏁堢巼涔熼珮銆?br /> 濡傛灉瀹氫箟浜嗘煇涓繍綆楃錛堜緥濡傦紝operator+錛夛紝閭d箞閫氬父榪樺簲璇ュ悓鏃跺畾涔変笌榪欎釜榪愮畻絎︾浉瀵瑰簲鐨勮祴鍊艱繍綆楃錛堜緥濡傦紝operator+=錛夈傚茍涓旂敤鍚庤呮潵瀹炵幇鍓嶈呫傝屼笖錛岃繕搴旇緇存姢op鍜宱p=涔嬮棿鐨勮嚜鐒跺叧緋匯?br /> 鍦–++鏍囧噯涓瀹氾細(xì)榪愮畻絎?錛岋紙錛夛紝[]鍜?>蹇呴』琚畾涔変負(fù)鎴愬憳鍑芥暟錛岃屽湪綾諱腑瀹氫箟鐨刵ew,new [],delete鍜宒elete[]絳夎繍綆楃鍑芥暟蹇呴』鏄潤鎬佹垚鍛樺嚱鏁般傚浜庡叾浠栫殑榪愮畻絎﹀嚱鏁幫細(xì) 濡傛灉榪愮畻絎﹀嚱鏁版槸鐢ㄤ簬嫻両/O鐨刼peator>>鎴栬卭perator<<錛屾垨鑰呭鏋滆繍綆楃鍑芥暟闇瑕佸鍏跺乏鎿嶄綔鏁拌繘琛岀被鍨嬭漿鎹紝鎴栬呰繍綆楃鍑芥暟鍙互閫氳繃綾葷殑鍏湁鎺ュ彛鏉ュ疄鐜幫紝閭d箞灝嗚繖涓嚱鏁板畾涔変負(fù)闈炴垚鍛樺嚱鏁幫紙鍦ㄥ墠涓ょ鎯呭喌涓紝濡傛灉闇瑕佺殑璇濅篃鍙互琚畾涔変負(fù)鍙嬪厓鍑芥暟錛夛紱濡傛灉榪愮畻絎﹀嚱鏁伴渶瑕佸疄鐜拌櫄鍑芥暟鐨勮涓猴紝閭d箞澧炲姞涓涓櫄鍑芥暟鏉ユ彁渚涜櫄鍑芥暟鐨勮涓猴紝騫剁敤榪欎釜铏氭垚鍛樺嚱鏁版潵瀹炵幇榪愮畻絎﹀嚱鏁板惁鍒欏皢棰勭畻瀵屽嚱鏁板畾涔変負(fù)鎴愬憳鍑芥暟銆?br /> 鍦ㄥ嚱鏁皁peator>>鍜宱perator<<涓簲璇ュ緇堣繑鍥炲嫻佸璞$殑寮曠敤銆?br /> 灝嗗熀綾葷殑鏋愭瀯鍑芥暟瀹氫箟涓鴻櫄鍑芥暟錛堥櫎闈炰綘鑳戒繚璇侊紝姘歌繙閮戒笉浼?xì)鏈変汉閫氳繃鎸囧悜鍩虹被鐨勬寚閽堟潵鍒犻櫎媧劇敓綾葷殑瀵硅薄錛夈?br /> 濡傛灉鍦ㄦ淳鐢熺被涓畾涔夌殑鍑芥暟涓庡熀綾諱腑鐨勫嚱鏁版湁鐩稿悓鐨勫悕瀛楋紝騫朵笖浣犱笉鎯抽殣钘忓熀綾諱腑鍑芥暟錛岄偅涔堝簲閫氳繃using澹版槑璇彞灝嗗熀綾葷殑榪欎釜鍑芥暟寮曞叆鍒版淳鐢熺被鐨勪綔鐢ㄥ煙涓?br /> 姘歌繙涓嶈鏀瑰彉琚鐩栫殑鍩虹被鍑芥暟涓殑榛樿鍙傛暟鍊箋?br /> 闄や簡瀵圭湡姝g殑Liskov IS-A鍜學(xué)ORKS-LIKE-A鍏崇郴榪涜寤烘ā涔嬪錛屾案榪滈兘涓嶈浣跨敤鍏辨湁緇ф壙銆傛墍鏈夎瑕嗙洊鐨勬垚鍛樺嚱鏁頒笉鑳借秴榪囧疄闄呴渶姹傜殑鑼冨洿錛屽悓鏃朵篃涓嶈兘灝忎簬榪欎釜鑼冨洿銆?br /> 浣跨敤鍏湁緇ф壙鐨勭洰鐨勬槸閲嶇敤浠g爜錛堢紪鍐欎互澶氭佺殑鏂瑰紡浣跨敤鍩虹被瀵硅薄鐨勪唬鐮侊級錛岃岄噸鐢紙鍩虹被涓殑錛変唬鐮佸茍涓嶄竴瀹氳浣跨敤鍏湁緇ф壙銆?br /> 瀵?#8220;is implemented in terms of”榪欑鍏崇郴寤烘ā鏃訛紝搴旇浼樺厛閫夋嫨鎴愬憳鍏崇郴/鍖呭惈鐨勬柟寮忥紝鑰屼笉鏄鏈夌戶鎵跨殑鏂瑰紡銆傚彧鏈夐潪鐢ㄧ戶鎵夸笉鍙椂錛屾墠搴旇浣跨敤縐佹湁緇ф壙——涔熷氨鏄錛屽綋闇瑕佽闂繚鎶ゆ垚鍛樻垨鑰呴渶瑕佽鐩栬櫄鍑芥暟鏃訛紝鎵嶄嬌鐢ㄧ鏈夌戶鎵褲傛案榪滈兘涓嶈鍙槸涓轟簡浠g爜閲嶇敤鑰屼嬌鐢ㄥ叡鏈夌戶鎵褲?br /> 瀵逛簬騫挎硾浣跨敤鐨勭被錛屽簲璇ヤ紭鍏堜嬌鐢ㄧ紪璇戝櫒闃茬伀澧欒繖縐嶆儻鐢ㄦ硶錛堜篃鍙仛Pimpl鎯敤娉曪級鏉ラ殣钘忓疄鐜扮粏鑺傦紝閫氳繃涓涓笉閫忔槑鐨勬寚閽堬紙鎸囧悜涓涓繘琛屼簡鍓嶇疆澹版槑浣嗗張娌℃湁瀹氫箟鐨勭被錛夋潵淇濆瓨縐佹湁鎴愬憳錛堝寘鎷姸鎬佸彉閲忓拰鎴愬憳鍑芥暟錛夛紝澹版槑榪欎釜鎸囬拡鏃跺彲閲囩敤“struct XxxxImpl* pImpl;XxxxImpl* pimpl_;”榪欐牱鐨勫艦寮忋備緥濡傦細(xì)“class map{ private :struct MapImpl;MapImpl* pimpl_;}” 鍖呭惈錛屼篃鍙互鍙仛“鑱氬悎”錛?#8220;鍒嗗眰”錛?#8220;HAS-A”鎴栬?#8220;濮旀墭”銆備紭鍏堥夋嫨鍖呭惈鑰屼笉鏄戶鎵匡紝瀵逛簬IS-IMPLEMENTED-IN-TERMS-OF榪欑鍏崇郴寤烘ā鏃訛紝搴旇浼樺厛鑰冭檻浣跨敤鍖呭惈錛岃屼笉鏄戶鎵褲?br /> ]]> 浠庣己闄蜂腑瀛︿範(fàn)C/C++ http://www.shnenglu.com/Daywei0123/archive/2014/07/24/207780.htmlDaywei Daywei Thu, 24 Jul 2014 07:29:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/07/24/207780.html http://www.shnenglu.com/Daywei0123/comments/207780.html http://www.shnenglu.com/Daywei0123/archive/2014/07/24/207780.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/207780.html http://www.shnenglu.com/Daywei0123/services/trackbacks/207780.html 鏈夌鍙穒nt涓庢棤絎﹀彿int姣旇緝鐨勫悗鏋?/strong>
int i = - 1 ; unsigned int ud = 1 ; if (i < ud) { printf( " true " ); } else { printf( " false " ); } 涓鐪嬬粨鏋滃簲璇ユ槸鎵撳嵃鍑簍rue錛屼絾浜嬪疄鍗存槸false銆?br />signed int 鍨嬪彉閲忚杞崲鎴恥nsigned int鍨嬪彉閲忋?1杞崲鎴恥nsigned int鐨勭粨鏋滄槸涓涓潪甯稿法澶х殑姝f暣鏁幫紙32浣嶇郴緇熶笂鏄?鐨?2嬈℃柟-1錛夛紝闇瑕佽繘琛屽己杞負(fù)int鍨嬨?br />浣嶅煙鍙橀噺
struct data { int flag: 1 ; int other: 31 ; } ; printf( " data size %d\n " , sizeof (data)); data test1; test.flag = 1 ; if (test.flag == 1 ) { printf( " true " ); } else { printf( " false " ); } int鐨勪綅鍩熷彉閲忥紝鑰岀敤涓涓猙it琛ㄧずint鏃訛紝榪欎竴浣嶆槸鐢ㄦ潵琛ㄧず鏈夌鍙蜂綅鐨勶紝甯︾鍙風(fēng)殑涓涓猙it鐨勪綅鍩熷彉閲忕殑鍙栧艱寖鍥存槸0鎴?1.鏃犵鍙風(fēng)殑涓涓猙it鐨勪綅鍩熷彉閲忕殑鍙栧艱寖鍥存槸0鎴?錛屾晠1璧嬬粰flag鏃朵細(xì)鍑虹幇婧㈠嚭錛宖lag鍙樹負(fù)-1. Reference錛?a >http://wenku.baidu.com/view/670eff4bf7ec4afe04a1dfd7.html ]]>Effective STL(5)鈥斺旂畻娉?/title> http://www.shnenglu.com/Daywei0123/archive/2014/06/25/207410.htmlDaywei Daywei Wed, 25 Jun 2014 09:06:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/06/25/207410.html http://www.shnenglu.com/Daywei0123/comments/207410.html http://www.shnenglu.com/Daywei0123/archive/2014/06/25/207410.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/207410.html http://www.shnenglu.com/Daywei0123/services/trackbacks/207410.html 1.紜繚鐩爣絀洪棿瓚沖澶?br /> 2.浜嗚В鍚勭涓庢帓搴忔湁鍏崇殑閫夋嫨 濡傛灉闇瑕佸vector銆乻tring銆乨eque鎴栬呮暟緇勪腑鐨勫厓绱犳墽琛屼竴嬈″畬鍏ㄦ帓搴忥紝閭d箞鍙互浣跨敤sort鎴栬卻table_sort銆?/span> 濡傛灉鏈変竴涓獀ector銆乻tring銆乨eque鎴栬呮暟緇勶紝騫朵笖鍙渶瑕佸絳変環(huán)鎬ф渶鍓嶉潰鐨刵涓厓绱犺繘琛屾帓搴忥紝閭d箞鍙互浣跨敤partial_sort銆?/span> 濡傛灉鏈変竴涓獀ector銆乻tring銆乨eque鎴栬呮暟緇勶紝騫朵笖闇瑕佹壘鍒扮n涓綅緗笂鐨勫厓绱狅紝鎴栬咃紝闇瑕佹壘鍒扮瓑浠鋒ф渶鍓嶉潰鐨刵涓厓绱犱絾鍙堜笉蹇呭榪檔涓厓绱犺繘琛屾帓搴忥紝閭d箞錛宯th_element姝f槸浣犳墍闇瑕佺殑鍑芥暟銆?/span> 濡傛灉闇瑕佸皢涓涓爣鍑嗗簭鍒楀鍣ㄤ腑鐨勫厓绱犳寜鐓ф槸鍚︽弧瓚蟲煇涓壒瀹氱殑鏉′歡鍖哄垎寮鏉ワ紝閭d箞錛宲artition鍜宻table_partition鍙兘姝f槸浣犳墍闇瑕佺殑銆?/span> 濡傛灉浣犵殑鏁版嵁鍦ㄤ竴涓猯ist涓紝閭d箞浣犱粛鐒跺彲浠ョ洿鎺ヨ皟鐢╬artition鍜宻table_partition綆楁硶錛涘彲浠ョ敤list::sort鏉ユ浛浠ort鍜宻table_sort綆楁硶銆備絾鏄紝濡傛灉浣犻渶瑕佽幏寰梡artial_sort鎴杗th_element綆楁硶鐨勬晥鏋滐紝閭d箞錛屾濡傚墠闈㈡垜鎵鎻愬埌鐨勯偅鏍鳳紝浣犲彲浠ユ湁涓浜涚畝媧佺殑閫斿緞鏉ュ畬鎴愯繖欏逛換鍔°?br /> 3銆傚鏋滅‘瀹為渶瑕佸垹闄ゅ厓绱狅紝鍒欓渶瑕佸湪remove榪欎竴綾葷畻娉曚箣鍚庤皟鐢╡rase銆?br /> remove涓嶆槸鐪熸鎰忎箟涓婄殑鍒犻櫎錛屽洜涓哄畠鍋氫笉鍒般?br /> 4.瀵瑰寘鍚寚閽堢殑瀹瑰櫒浣跨敤remove榪欎竴綾葷畻娉曟椂瑕佺壒鍒皬蹇冦備細(xì)瀵艱嚧璧勬簮娉勯湶銆?br /> 5.浜嗚В鍝簺綆楁硶瑕佹眰浣跨敤鎺掑簭鐨勫尯闂翠綔涓哄弬鏁般?br /> 6.閫氳繃mismatch鎴杔exicographical_compare瀹炵幇綆鍗曞湴蹇界暐澶у皬鍐欑殑瀛楃涓叉瘮杈?br /> 7.鐞嗚Вcopy_if綆楁硶鐨勬紜疄鐜?br /> 8.浣跨敤accumlate鎴栬協(xié)or_each榪涜鍖洪棿緇熻銆?/span> ]]> Effective STL(4)鈥斺旇凱浠e櫒 http://www.shnenglu.com/Daywei0123/archive/2014/06/13/207272.htmlDaywei Daywei Fri, 13 Jun 2014 07:00:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/06/13/207272.html http://www.shnenglu.com/Daywei0123/comments/207272.html http://www.shnenglu.com/Daywei0123/archive/2014/06/13/207272.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/207272.html http://www.shnenglu.com/Daywei0123/services/trackbacks/207272.html 1.iterator 浼樺厛浜巆onst_iterator銆乺everse_iterator鍙?qiáng)const_reverse_iterator 2.浣跨敤distance鍜宎dvace灝嗗鍣ㄧ殑const_iterator杞崲鎴恑terator 3.姝g‘鐞嗚В鐢眗everse_iterator鐨刡ase錛堬級鎴愬憳鍑芥暟鎵浜х敓鐨刬terator鐨勭敤娉曘?br /> 4.瀵逛簬閫愪釜瀛楃鐨勮緭鍏ヨ鑰冭檻浣跨敤istreambuf_iterator ]]>Effective STL(3)鈥斺斿叧鑱斿鍣?/title> http://www.shnenglu.com/Daywei0123/archive/2014/05/16/206995.htmlDaywei Daywei Fri, 16 May 2014 08:30:00 GMT http://www.shnenglu.com/Daywei0123/archive/2014/05/16/206995.html http://www.shnenglu.com/Daywei0123/comments/206995.html http://www.shnenglu.com/Daywei0123/archive/2014/05/16/206995.html#Feedback 0 http://www.shnenglu.com/Daywei0123/comments/commentRss/206995.html http://www.shnenglu.com/Daywei0123/services/trackbacks/206995.html 1.鐞嗚В鐩哥瓑錛坋quality錛夊拰絳変環(huán)錛坋quivalence錛夌殑鍖哄埆 鐩哥瓑鐨勬蹇墊槸鍩轟簬operator==鐨勩傜瓑浠峰叧緋繪槸浠?#8220;鍦ㄥ凡鎺掑簭鐨勫尯闂翠腑瀵硅薄鍊煎緱鐩稿欏哄簭”涓哄熀紜鐨勩傚鏋滀粠姣忎釜鏍囧噯鍏寵仈瀹瑰櫒鐨勬帓鍒楅『搴忔潵鑰冭檻絳変環(huán)鍏崇郴錛岄偅涔堢潃灝嗘槸鏈夋剰涔夌殑銆傛爣鍑嗗叧鑱斿鍣ㄥ鍩轟簬絳変環(huán)鑰屼笉鏄浉絳夌殑銆?/span>鏍囧噯鍏寵仈瀹瑰櫒鎬繪槸淇濇寔鎺掑垪欏哄簭鐨勶紝鎵浠ユ瘡涓鍣ㄥ繀欏繪湁涓涓瘮杈冨嚱鏁幫紙榛樿less錛夋潵鍐沖畾淇濇寔鎬庢牱鐨勯『搴忋傜瓑浠鋒槸鎸夌収 姣旇緝鍑芥暟瀛愩?/strong> 鍥犳錛屾爣鍑嗗叧鑱斿鍣ㄧ殑浣跨敤鑰呰涓烘墍浣跨敤鐨勬瘡涓鍣ㄦ寚瀹氫竴涓瘮杈冨嚱鏁幫紙鐢ㄦ潵鍐沖畾濡備綍鎺掑簭錛夈傚鏋滆鍏寵仈瀹瑰櫒浣跨敤鐩哥瓑鏉ュ喅瀹氫袱涓璞℃槸鍚︽湁鐩稿悓鐨勫鹼紝閭d箞姣忎釜鍏寵仈瀹瑰櫒闄や簡鐢ㄤ簬鎺掑簭鐨勬瘮杈冨嚱鏁板錛岃繕闇瑕佸彟涓涓瘮杈冨嚱鏁版潵鍐沖畾涓や釜鍊兼槸鍚︾浉絳夛紙榛樿鎯呭喌涓嬶紝璇ユ瘮杈冨嚱鏁板簲璇ユ槸equal_to錛屼絾鏈夎叮鐨勬槸equal_to浠庢潵娌℃湁琚敤鍋歋TL鐨勯粯璁ゆ瘮杈冨嚱鏁般傚綋STL涓渶瑕佺浉絳夊垽鏂椂錛屼竴鑸殑鎯緥鏄洿鎺ヨ皟鐢╫perator==銆傛瘮濡傦紝闈炴垚鍛樺嚱鏁癴ind綆楁硶灝辨槸榪欎箞鍋氱殑錛?br /> 2.涓哄寘鍚寚閽堢殑鍏寵仈瀹瑰櫒鎸囧畾姣旇緝綾誨瀷 why錛熺涓鏉″凡緇忚鏄庡叧鑱斿鍣ㄦ槸瑕佹帓搴忋傛瘡褰撲綘瑕佸垱寤哄寘鍚寚閽堢殑鍏寵仈瀹瑰櫒鏃訛紝涓瀹氳璁頒綇錛屽鍣ㄥ皢浼?xì)鎸夌収鎸囬拡鐨勫艱繘琛屾帓搴忋備竴鑸槸涓嶆槸浣犲笇鏈涚殑錛屾墍浠ヤ綘鍑犱箮瑕佸垱寤鴻嚜宸辯殑鍑芥暟瀛愮被浣滀負(fù)璇ュ鍣ㄧ殑姣旇緝綾誨瀷銆?br /> 3.鎬繪槸璁╂瘮杈冨嚱鏁板湪絳夊兼儏鍐典笅榪斿洖false 姣旇緝鍑芥暟鐨勮繑鍥炲艱〃鏄庣殑鏄寜鐓ц鍑芥暟瀹氫箟鐨勬帓鍒楅『搴忥紝涓涓兼槸鍚﹀湪鍙︿竴涓箣鍓嶃傜浉絳夌殑鍊間粠鏉ヤ笉浼?xì)鏈夊墠鍚帣搴搴忓叧绯诲Q屾墍浠ワ紝瀵逛簬鐩哥瓑鐨勫鹼紝姣旇緝鍑芥暟搴旇濮嬬粓榪斿洖false銆?br /> 4.鍒囧嬁鐩存帴淇敼set鎴杕ultiset涓殑閿?br /> 5銆傝冭檻鐢ㄦ帓搴忕殑vector鏇夸唬鍏寵仈瀹瑰櫒 鍦ㄦ帓搴忕殑vector涓瓨鍌ㄦ暟鎹彲鑳芥瘮鍦ㄦ爣鍑嗗叧鑱斿鍣ㄤ腑瀛樺偍鍚屾牱鐨勬暟鎹鑰楄垂鏇村皯鐨勫唴瀛橈紝鑰岃冭檻鍒伴〉闈㈤敊璇殑鍥犵礌錛岄氳繃浜屽垎鎼滅儲娉曟潵鏌ユ壘涓涓帓搴忕殑vector鍙兘姣旀煡鎵句竴涓爣鍑嗗叧鑱斿鍣ㄨ鏇村揩涓浜涖?/span>6.褰撴晥鐜囪嚦鍏抽噸瑕佹椂錛岃鍦╩ap::operator[]涓巑ap::insert涔嬮棿璋ㄦ厧鍋氬嚭閫夋嫨 map::operator[]鐨勮璁$洰鐨勬槸涓轟簡鎻愪緵“娣誨姞鍜屾洿鏂?#8221;鐨勫姛鑳姐傛坊鍔犱竴涓柊鍏冪礌鏈濂介夊悗鑰卛nsert銆?br /> 7.鐔熸?zhèn)夐潪鏍囧噯鐨勬暎鍒楀鍣ㄣ?/span> ]]> 青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品
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