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收录了59512篇文章 ·61549个问题 · 0人关注
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Is there a max array length limit in C++?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IsthereamaxlengthforanarrayinC++? IsitaC++limitordoesitdependonmymachine?Isittweakable?Doesitdependonthetypeth......

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std::enable_if to conditionally compile a member f

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Iamtryingtogetasimpleexampletoworktounderstandhowtousestd::enable_if.AfterIreadthisanswer,Ithoughtitshouldn\'tbetoo......

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Convert a String In C++ To Upper Case

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Howcouldoneconvertastringtouppercase.TheexamplesIhavefoundfromgooglingonlyhavetodealwithchars. 回答1: Booststringa......

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Is #pragma once a safe include guard?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: I\'vereadthatthereissomecompileroptimizationwhenusing#pragmaoncewhichcanresultinfastercompilation.Irecognizethatisnon-......

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c++11 Return value optimization or move? [duplicat

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Thisquestionalreadyhasananswerhere: HowtoreturnanobjectfromafunctionconsideringC++11rvaluesan......

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Is Meyers' implementation of the Singleton pat

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Isthefollowingimplementation,usinglazyinitialization,ofSingleton(Meyers\'Singleton)threadsafe? staticSingleton&instance() { ......

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std::string formatting like sprintf

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Ihavetoformatstd::stringwithsprintfandsenditintofilestream.HowcanIdothis? 回答1: Youcan\'tdoitdirectly,becauseyou......

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unsigned int vs. size_t

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: InoticethatmodernCandC++codeseemstousesize_tinsteadofint/unsignedintprettymucheverywhere-fromparametersforCstringfun......

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Extracting text OpenCV

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Iamtryingtofindtheboundingboxesoftextinanimageandamcurrentlyusingthisapproach: //calculatethelocalvariancesofthegra......

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Why isn't it legal to convert “pointer to poin

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Itislegaltoconvertapointer-to-non-consttoapointer-to-const. Thenwhyisn\'titlegaltoconvertapointertopointertonon-constt......

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Calling class method through NULL class pointer [d

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Thisquestionalreadyhasananswerhere: WhatwillhappenwhenIcallamemberfunctiononaNULLobjectpoin......

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std::maps with user-defined types as key

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: I\'mwonderingwhyIcan\'tuseSTLmapswithuser-definedclasses.WhenIcompilethecodebelow,Igetthiscrypticerrormessage.Whatdo......

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Why can't the template argument be deduced whe

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whatiswronginthiscode? #include<map> template<typenameT> structTMap { typedefstd::map<T,T>Type; }; template<typenameT>...

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C++ new int[0] — will it allocate memory?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Asimpletestapp: cout<<newint[0]<<endl; outputs: 0x876c0b8 Soitlookslikeitworks.Whatdoesthestandardsayaboutthis?Is......

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Advantage of switch over if-else statement

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: What\'sthebestpracticeforusingaswitchstatementvsusinganifstatementfor30unsignedenumerationswhereabout10haveanexpected......

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Why are preprocessor macros evil and what are the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IhavealwaysaskedthisbutIhaveneverreceivedareallygoodanswer;Ithinkthatalmostanyprogrammerbeforeevenwritingthefirst\"H......

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How to implement big int in C++

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: I\'dliketoimplementabigintclassinC++asaprogrammingexercise&mdash;aclassthatcanhandlenumbersbiggerthanalongint.Iknow......

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C++0x has no semaphores? How to synchronize thread

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IsittruethatC++0xwillcomewithoutsemaphores?TherearealreadysomequestionsonStackOverflowregardingtheuseofsemaphores.Iuse......

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How do I find the location of the executable in C?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Thisquestionalreadyhasananswerhere: Findingcurrentexecutable&#39;spathwithout/proc/self/exe ......

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make_unique and perfect forwarding

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whyistherenostd::make_uniquefunctiontemplateinthestandardC++11library?Ifind std::unique_ptr<SomeUserDefinedType>p(newSomeUser......