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1、Whatisthedifferencebetween_tmain()andmain()inC++?IfIrunmyC++applicationwiththefollowingmain()methodeverythingisOK:intmain(intargc,char*argv[]){cout<<"Thereare"<

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3、Itjustdisplaysthefirstcharacterofeachargument.Whatisthedifferencecausingthis?c++unicodeargumentsaskedMay21'09at23:45joshcomley5,7793326973%acceptratefeedback4Answers_tmaindoesnotexistinC++.maindoes._tmainisaMicrosoftextension.mainis,accordingtotheC++standard,theprogram'

4、sentrypoint.Ithasoneofthesetwosignatures:intmain();intmain(intargc,char*argv[]);Microsofthasaddedawmainwhichreplacesthesecondsignaturewiththis:intwmain(intargc,wchar_t*argv[]);Andthen,tomakeiteasiertoswitchbetweenUnicode(UTF-16)andtheirmultibytecharacterset,they'vedefin

5、ed_tmainwhich,ifUnicodeisenabled,iscompiledaswmain,andotherwiseasmain.Asforthesecondpartofyourquestion,thefirstpartofthepuzzleisthatyourmainfunctioniswrong.stackoverflow.com/questions/895827/what-is-the-difference-between-tmain-and-main-in-c1/4wmainshouldtakeawchar_targ

6、ument,notchar.Sincethecompilerdoesn'tenforcethisforthemainfunction,yougetaprogramwhereanarrayofwchar_tstringsarepassedtothemainfunction,whichinterpretsthemascharstrings.Now,inUTF-16,thecharactersetusedbyWindowswhenUnicodeisenabled,alltheASCIIcharactersarerepresentedasth

7、epairofbytesfollowedbytheASCIIvalue.Andsincethex86CPUislittle-endian,theorderofthesebytesareswapped,sothattheASCIIvaluecomesfirst,thenfollowedbyanullbyte.Andinacharstring,howisthestringusuallyterminated?Yep,byanullbyte.Soyourprogramseesabunchofstrings,eachonebytelong.

8、Ingeneral,youhavethreeoptionswhendoingWindowsprogramming:ExplicitlyuseUnicode(callwmain,andforeveryWindowsAPIf