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......
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......
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......
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-......
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......
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() { ......
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......
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......
Extracting text OpenCV
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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......
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......
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......
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>...
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......
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......
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......
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—aclassthatcanhandlenumbersbiggerthanalongint.Iknow......
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......
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'spathwithout/proc/self/exe ......
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......