Linux删除空行基于sed

　　老韩LinuxSRE
　　使用gcc指令对C语言源文件做做预处理〔roothanywk8HelloWorldTest〕gccEHelloWorld。coHelloWorld。i
　　使用nl指令查看有很多空行，看起来十分不方便。
　　nl指令查看有很多空行
　　去空行方式1（删除纯空行），指令及输出结果如下。〔roothanywk8HelloWorldTest〕sedsdHelloWorld。i1HelloWorld。c1builtin1commandline1usrincludestdcpredef。h1341commandline21HelloWorld。c1usrincludestdio。h13427usrincludestdio。h341usrincludefeatures。h134375usrincludefeatures。h341usrincludesyscdefs。h134392usrincludesyscdefs。h341usrincludebitswordsize。h134393usrincludesyscdefs。h234376usrincludefeatures。h234399usrincludefeatures。h341usrincludegnustubs。h13410usrincludegnustubs。h341usrincludegnustubs64。h13411usrincludegnustubs。h234400usrincludefeatures。h23428usrincludestdio。h2341usrlibgccx8664redhatlinux4。8。5includestddef。h134212usrlibgccx8664redhatlinux4。8。5includestddef。h3434usrincludestdio。h2341usrincludebitstypes。h13427usrincludebitstypes。h341usrincludebitswordsize。h13428usrincludebitstypes。h234typedefsignedcharint8t；typedefunsignedcharuint8t；typedefsignedshortintint16t；typedefunsignedshortintuint16t；typedefsignedintint32t；typedefunsignedintuint32t；typedefsignedlongintint64t；typedefunsignedlongintuint64t；130usrincludebitstypes。h341usrincludebitstypesizes。h134131usrincludebitstypes。h234typedefunsignedlongintino64t；typedeflongintoff64t；typedefstruct｛intval〔2〕；｝typedefunsignedlongintrlim64t；typedeflongintblkcnt64t；typedefunsignedlongintfsblkcnt64t；typedefunsignedlongintfsfilcnt64t；typedefoff6436usrincludestdio。h23444usrincludestdio。h34structIOFILE；typedefstructIOFILEFILE；64usrincludestdio。h34typedefstructIOFILEFILE；74usrincludestdio。h341usrincludelibio。h13432usrincludelibio。h341usrincludeGconfig。h13415usrincludeGconfig。h341usrlibgccx8664redhatlinux4。8。5includestddef。h13416usrincludeGconfig。h2341usrincludewchar。h13482usrincludewchar。h34typedefstruct｛union｛charwchb〔4〕；｝｝21usrincludeGconfig。h234typedefstruct｛｝Gtypedefstruct｛off64｝Gfpos64t；33usrincludelibio。h23450usrincludelibio。h341usrlibgccx8664redhatlinux4。8。5includestdarg。h13440usrlibgccx8664redhatlinux4。8。5includestdarg。h3451usrincludelibio。h234145usrincludelibio。h34structIOstructIOFILE；155usrincludelibio。h34typedefvoidIOstructIOmarker｛structIOstructIOFILE178usrincludelibio。h34｝；enumcodecvtresult｛codecvtok，codecvtpartial，codecvterror，codecvtnoconv｝；246usrincludelibio。h34structIOFILE｛charIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOstructIOstructIOFILEintflags2；charshortbuf〔1〕；IO294usrincludelibio。h34off64303usrincludelibio。h34voidpad1；voidpad2；voidpad3；voidpad4；sizetpad5；charunused2〔15sizeof（int）4sizeof（void）sizeof（sizet）〕；｝；typedefstructIOFILEIOFILE；structIOFILEexternstructIOFILEplusIO21externstructIOFILEplusIO21externstructIOFILEplusIO21339usrincludelibio。h34typedefssizetioreadfn（voidcookie，charbuf，sizetnbytes）；typedefssizetiowritefn（voidcookie，constcharbuf，sizetn）；typedefintioseekfn（voidcookie，off64tpos，intw）；typedefintioclosefn（voidcookie）；391usrincludelibio。h34externintunderflow（IOFILE）；externintuflow（IOFILE）；externintoverflow（IOFILE，int）；435usrincludelibio。h34externintIOgetc（IOFILEfp）；externintIOputc（intc，IOFILEfp）；externintIOfeof（IOFILEfp）attribute（（nothrow，leaf））；externintIOferror（IOFILEfp）attribute（（nothrow，leaf））；externintIOpeekclocked（IOFILEfp）；externvoidIOflockfile（IOFILE）attribute（（nothrow，leaf））；externvoidIOfunlockfile（IOFILE）attribute（（nothrow，leaf））；externintIOftrylockfile（IOFILE）attribute（（nothrow，leaf））；465usrincludelibio。h34externintIOvfscanf（IOFILErestrict，constcharrestrict，gnucvalist，intrestrict）；externintIOvfprintf（IOFILErestrict，constcharrestrict，gnucvalist）；externssizetIOpadn（IOFILE，int，ssizet）；externsizetIOsgetn（IOFILE，void，sizet）；externoff64tIOseekoff（IOFILE，off64t，int，int）；externoff64tIOseekpos（IOFILE，off64t，int）；externvoidIOfreebackuparea（IOFILE）attribute（（nothrow，leaf））；75usrincludestdio。h23490usrincludestdio。h34102usrincludestdio。h34typedefG164usrincludestdio。h341usrincludebitsstdiolim。h134165usrincludestdio。h234externstructIOFILEexternstructIOFILEexternstructIOFILEexternintremove（constcharfilename）attribute（（nothrow，leaf））；externintrename（constcharold，constcharnew）attribute（（nothrow，leaf））；externintrenameat（intoldfd，constcharold，intnewfd，constcharnew）attribute（（nothrow，leaf））；externFILEtmpfile（void）；209usrincludestdio。h34externchartmpnam（chars）attribute（（nothrow，leaf））；externchartmpnamr（chars）attribute（（nothrow，leaf））；227usrincludestdio。h34externchartempnam（constchardir，constcharpfx）attribute（（nothrow，leaf））attribute（（malloc））；externintfclose（FILEstream）；externintfflush（FILEstream）；252usrincludestdio。h34externintfflushunlocked（FILEstream）；266usrincludestdio。h34externFILEfopen（constcharrestrictfilename，constcharrestrictmodes）；externFILEfreopen（constcharrestrictfilename，constcharrestrictmodes，FILErestrictstream）；295usrincludestdio。h34306usrincludestdio。h34externFILEfdopen（intfd，constcharmodes）attribute（（nothrow，leaf））；319usrincludestdio。h34externFILEfmemopen（voids，sizetlen，constcharmodes）attribute（（nothrow，leaf））；externFILEopenmemstream（charbufloc，sizetsizeloc）attribute（（nothrow，leaf））；externvoidsetbuf（FILErestrictstream，charrestrictbuf）attribute（（nothrow，leaf））；externintsetvbuf（FILErestrictstream，charrestrictbuf，intmodes，sizetn）attribute（（nothrow，leaf））；externvoidsetbuffer（FILErestrictstream，charrestrictbuf，sizetsize）attribute（（nothrow，leaf））；externvoidsetlinebuf（FILEstream）attribute（（nothrow，leaf））；externintfprintf（FILErestrictstream，constcharrestrictformat，。。。）；externintprintf（constcharrestrictformat，。。。）；externintsprintf（charrestricts，constcharrestrictformat，。。。）attribute（（nothrow））；externintvfprintf（FILErestricts，constcharrestrictformat，gnucvalistarg）；externintvprintf（constcharrestrictformat，gnucvalistarg）；externintvsprintf（charrestricts，constcharrestrictformat，gnucvalistarg）attribute（（nothrow））；externintsnprintf（charrestricts，sizetmaxlen，constcharrestrictformat，。。。）attribute（（nothrow））attribute（（format（printf，3，4）））；externintvsnprintf（charrestricts，sizetmaxlen，constcharrestrictformat，gnucvalistarg）attribute（（nothrow））attribute（（format（printf，3，0）））；412usrincludestdio。h34externintvdprintf（intfd，constcharrestrictfmt，gnucvalistarg）attribute（（format（printf，2，0）））；externintdprintf（intfd，constcharrestrictfmt，。。。）attribute（（format（printf，2，3）））；externintfscanf（FILErestrictstream，constcharrestrictformat，。。。）；externintscanf（constcharrestrictformat，。。。）；externintsscanf（constcharrestricts，constcharrestrictformat，。。。）attribute（（nothrow，leaf））；443usrincludestdio。h34externintfscanf（FILErestrictstream，constcharrestrictformat，。。。）asm（isoc99fscanf）；externintscanf（constcharrestrictformat，。。。）asm（isoc99scanf）；externintsscanf（constcharrestricts，constcharrestrictformat，。。。）asm（isoc99sscanf）attribute（（nothrow，leaf））；463usrincludestdio。h34externintvfscanf（FILErestricts，constcharrestrictformat，gnucvalistarg）attribute（（format（scanf，2，0）））；externintvscanf（constcharrestrictformat，gnucvalistarg）attribute（（format（scanf，1，0）））；externintvsscanf（constcharrestricts，constcharrestrictformat，gnucvalistarg）attribute（（nothrow，leaf））attribute（（format（scanf，2，0）））；494usrincludestdio。h34externintvfscanf（FILErestricts，constcharrestrictformat，gnucvalistarg）asm（isoc99vfscanf）attribute（（format（scanf，2，0）））；externintvscanf（constcharrestrictformat，gnucvalistarg）asm（isoc99vscanf）attribute（（format（scanf，1，0）））；externintvsscanf（constcharrestricts，constcharrestrictformat，gnucvalistarg）asm（isoc99vsscanf）attribute（（nothrow，leaf））attribute（（format（scanf，2，0）））；522usrincludestdio。h34externintfgetc（FILEstream）；externintgetc（FILEstream）；externintgetchar（void）；550usrincludestdio。h34externintgetcunlocked（FILEstream）；externintgetcharunlocked（void）；561usrincludestdio。h34externintfgetcunlocked（FILEstream）；externintfputc（intc，FILEstream）；externintputc（intc，FILEstream）；externintputchar（intc）；594usrincludestdio。h34externintfputcunlocked（intc，FILEstream）；externintputcunlocked（intc，FILEstream）；externintputcharunlocked（intc）；externintgetw（FILEstream）；externintputw（intw，FILEstream）；externcharfgets（charrestricts，intn，FILErestrictstream）；638usrincludestdio。h34externchargets（chars）attribute（（deprecated））；665usrincludestdio。h34externssizetgetdelim（charrestrictlineptr，sizetrestrictn，intdelimiter，FILErestrictstream）；externssizetgetdelim（charrestrictlineptr，sizetrestrictn，intdelimiter，FILErestrictstream）；externssizetgetline（charrestrictlineptr，sizetrestrictn，FILErestrictstream）；externintfputs（constcharrestricts，FILErestrictstream）；externintputs（constchars）；externintungetc（intc，FILEstream）；externsizetfread（voidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externsizetfwrite（constvoidrestrictptr，sizetsize，sizetn，FILErestricts）；737usrincludestdio。h34externsizetfreadunlocked（voidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externsizetfwriteunlocked（constvoidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externintfseek（FILEstream，longintoff，intwhence）；externlongintftell（FILEstream）；externvoidrewind（FILEstream）；773usrincludestdio。h34externintfseeko（FILEstream，offtoff，intwhence）；externofftftello（FILEstream）；792usrincludestdio。h34externintfgetpos（FILErestrictstream，fpostrestrictpos）；externintfsetpos（FILEstream，constfpostpos）；815usrincludestdio。h34824usrincludestdio。h34externvoidclearerr（FILEstream）attribute（（nothrow，leaf））；externintfeof（FILEstream）attribute（（nothrow，leaf））；externintferror（FILEstream）attribute（（nothrow，leaf））；externvoidclearerrunlocked（FILEstream）attribute（（nothrow，leaf））；externintfeofunlocked（FILEstream）attribute（（nothrow，leaf））；externintferrorunlocked（FILEstream）attribute（（nothrow，leaf））；externvoidperror（constchars）；1usrincludebitssyserrlist。h13426usrincludebitssyserrlist。h34externconstcharconstsyserrlist〔〕；854usrincludestdio。h234externintfileno（FILEstream）attribute（（nothrow，leaf））；externintfilenounlocked（FILEstream）attribute（（nothrow，leaf））；873usrincludestdio。h34externFILEpopen（constcharcommand，constcharmodes）；externintpclose（FILEstream）；externcharctermid（chars）attribute（（nothrow，leaf））；913usrincludestdio。h34externvoidflockfile（FILEstream）attribute（（nothrow，leaf））；externintftrylockfile（FILEstream）attribute（（nothrow，leaf））；externvoidfunlockfile（FILEstream）attribute（（nothrow，leaf））；943usrincludestdio。h342HelloWorld。c2intmain（void）｛printf（HelloWorld）；return0；｝
　　方式2、删除由纯空格和空行组成的空行〔roothanywk8HelloWorldTest〕sed〔〕dHelloWorld。ised：eexpression1，char8：unterminatedaddressregex〔roothanywk8HelloWorldTest〕〔roothanywk8HelloWorldTest〕〔roothanywk8HelloWorldTest〕sed〔〕dHelloWorld。i1HelloWorld。c1builtin1commandline1usrincludestdcpredef。h1341commandline21HelloWorld。c1usrincludestdio。h13427usrincludestdio。h341usrincludefeatures。h134375usrincludefeatures。h341usrincludesyscdefs。h134392usrincludesyscdefs。h341usrincludebitswordsize。h134393usrincludesyscdefs。h234376usrincludefeatures。h234399usrincludefeatures。h341usrincludegnustubs。h13410usrincludegnustubs。h341usrincludegnustubs64。h13411usrincludegnustubs。h234400usrincludefeatures。h23428usrincludestdio。h2341usrlibgccx8664redhatlinux4。8。5includestddef。h134212usrlibgccx8664redhatlinux4。8。5includestddef。h3434usrincludestdio。h2341usrincludebitstypes。h13427usrincludebitstypes。h341usrincludebitswordsize。h13428usrincludebitstypes。h234typedefsignedcharint8t；typedefunsignedcharuint8t；typedefsignedshortintint16t；typedefunsignedshortintuint16t；typedefsignedintint32t；typedefunsignedintuint32t；typedefsignedlongintint64t；typedefunsignedlongintuint64t；130usrincludebitstypes。h341usrincludebitstypesizes。h134131usrincludebitstypes。h234typedefunsignedlongintino64t；typedeflongintoff64t；typedefstruct｛intval〔2〕；｝typedefunsignedlongintrlim64t；typedeflongintblkcnt64t；typedefunsignedlongintfsblkcnt64t；typedefunsignedlongintfsfilcnt64t；typedefoff6436usrincludestdio。h23444usrincludestdio。h34structIOFILE；typedefstructIOFILEFILE；64usrincludestdio。h34typedefstructIOFILEFILE；74usrincludestdio。h341usrincludelibio。h13432usrincludelibio。h341usrincludeGconfig。h13415usrincludeGconfig。h341usrlibgccx8664redhatlinux4。8。5includestddef。h13416usrincludeGconfig。h2341usrincludewchar。h13482usrincludewchar。h34typedefstruct｛union｛charwchb〔4〕；｝｝21usrincludeGconfig。h234typedefstruct｛｝Gtypedefstruct｛off64｝Gfpos64t；33usrincludelibio。h23450usrincludelibio。h341usrlibgccx8664redhatlinux4。8。5includestdarg。h13440usrlibgccx8664redhatlinux4。8。5includestdarg。h3451usrincludelibio。h234145usrincludelibio。h34structIOstructIOFILE；155usrincludelibio。h34typedefvoidIOstructIOmarker｛structIOstructIOFILE178usrincludelibio。h34｝；enumcodecvtresult｛codecvtok，codecvtpartial，codecvterror，codecvtnoconv｝；246usrincludelibio。h34structIOFILE｛charIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOcharIOstructIOstructIOFILEintflags2；charshortbuf〔1〕；IO294usrincludelibio。h34off64303usrincludelibio。h34voidpad1；voidpad2；voidpad3；voidpad4；sizetpad5；charunused2〔15sizeof（int）4sizeof（void）sizeof（sizet）〕；｝；typedefstructIOFILEIOFILE；structIOFILEexternstructIOFILEplusIO21externstructIOFILEplusIO21externstructIOFILEplusIO21339usrincludelibio。h34typedefssizetioreadfn（voidcookie，charbuf，sizetnbytes）；typedefssizetiowritefn（voidcookie，constcharbuf，sizetn）；typedefintioseekfn（voidcookie，off64tpos，intw）；typedefintioclosefn（voidcookie）；391usrincludelibio。h34externintunderflow（IOFILE）；externintuflow（IOFILE）；externintoverflow（IOFILE，int）；435usrincludelibio。h34externintIOgetc（IOFILEfp）；externintIOputc（intc，IOFILEfp）；externintIOfeof（IOFILEfp）attribute（（nothrow，leaf））；externintIOferror（IOFILEfp）attribute（（nothrow，leaf））；externintIOpeekclocked（IOFILEfp）；externvoidIOflockfile（IOFILE）attribute（（nothrow，leaf））；externvoidIOfunlockfile（IOFILE）attribute（（nothrow，leaf））；externintIOftrylockfile（IOFILE）attribute（（nothrow，leaf））；465usrincludelibio。h34externintIOvfscanf（IOFILErestrict，constcharrestrict，gnucvalist，intrestrict）；externintIOvfprintf（IOFILErestrict，constcharrestrict，gnucvalist）；externssizetIOpadn（IOFILE，int，ssizet）；externsizetIOsgetn（IOFILE，void，sizet）；externoff64tIOseekoff（IOFILE，off64t，int，int）；externoff64tIOseekpos（IOFILE，off64t，int）；externvoidIOfreebackuparea（IOFILE）attribute（（nothrow，leaf））；75usrincludestdio。h23490usrincludestdio。h34102usrincludestdio。h34typedefG164usrincludestdio。h341usrincludebitsstdiolim。h134165usrincludestdio。h234externstructIOFILEexternstructIOFILEexternstructIOFILEexternintremove（constcharfilename）attribute（（nothrow，leaf））；externintrename（constcharold，constcharnew）attribute（（nothrow，leaf））；externintrenameat（intoldfd，constcharold，intnewfd，constcharnew）attribute（（nothrow，leaf））；externFILEtmpfile（void）；209usrincludestdio。h34externchartmpnam（chars）attribute（（nothrow，leaf））；externchartmpnamr（chars）attribute（（nothrow，leaf））；227usrincludestdio。h34externchartempnam（constchardir，constcharpfx）attribute（（nothrow，leaf））attribute（（malloc））；externintfclose（FILEstream）；externintfflush（FILEstream）；252usrincludestdio。h34externintfflushunlocked（FILEstream）；266usrincludestdio。h34externFILEfopen（constcharrestrictfilename，constcharrestrictmodes）；externFILEfreopen（constcharrestrictfilename，constcharrestrictmodes，FILErestrictstream）；295usrincludestdio。h34306usrincludestdio。h34externFILEfdopen（intfd，constcharmodes）attribute（（nothrow，leaf））；319usrincludestdio。h34externFILEfmemopen（voids，sizetlen，constcharmodes）attribute（（nothrow，leaf））；externFILEopenmemstream（charbufloc，sizetsizeloc）attribute（（nothrow，leaf））；externvoidsetbuf（FILErestrictstream，charrestrictbuf）attribute（（nothrow，leaf））；externintsetvbuf（FILErestrictstream，charrestrictbuf，intmodes，sizetn）attribute（（nothrow，leaf））；externvoidsetbuffer（FILErestrictstream，charrestrictbuf，sizetsize）attribute（（nothrow，leaf））；externvoidsetlinebuf（FILEstream）attribute（（nothrow，leaf））；externintfprintf（FILErestrictstream，constcharrestrictformat，。。。）；externintprintf（constcharrestrictformat，。。。）；externintsprintf（charrestricts，constcharrestrictformat，。。。）attribute（（nothrow））；externintvfprintf（FILErestricts，constcharrestrictformat，gnucvalistarg）；externintvprintf（constcharrestrictformat，gnucvalistarg）；externintvsprintf（charrestricts，constcharrestrictformat，gnucvalistarg）attribute（（nothrow））；externintsnprintf（charrestricts，sizetmaxlen，constcharrestrictformat，。。。）attribute（（nothrow））attribute（（format（printf，3，4）））；externintvsnprintf（charrestricts，sizetmaxlen，constcharrestrictformat，gnucvalistarg）attribute（（nothrow））attribute（（format（printf，3，0）））；412usrincludestdio。h34externintvdprintf（intfd，constcharrestrictfmt，gnucvalistarg）attribute（（format（printf，2，0）））；externintdprintf（intfd，constcharrestrictfmt，。。。）attribute（（format（printf，2，3）））；externintfscanf（FILErestrictstream，constcharrestrictformat，。。。）；externintscanf（constcharrestrictformat，。。。）；externintsscanf（constcharrestricts，constcharrestrictformat，。。。）attribute（（nothrow，leaf））；443usrincludestdio。h34externintfscanf（FILErestrictstream，constcharrestrictformat，。。。）asm（isoc99fscanf）；externintscanf（constcharrestrictformat，。。。）asm（isoc99scanf）；externintsscanf（constcharrestricts，constcharrestrictformat，。。。）asm（isoc99sscanf）attribute（（nothrow，leaf））；463usrincludestdio。h34externintvfscanf（FILErestricts，constcharrestrictformat，gnucvalistarg）attribute（（format（scanf，2，0）））；externintvscanf（constcharrestrictformat，gnucvalistarg）attribute（（format（scanf，1，0）））；externintvsscanf（constcharrestricts，constcharrestrictformat，gnucvalistarg）attribute（（nothrow，leaf））attribute（（format（scanf，2，0）））；494usrincludestdio。h34externintvfscanf（FILErestricts，constcharrestrictformat，gnucvalistarg）asm（isoc99vfscanf）attribute（（format（scanf，2，0）））；externintvscanf（constcharrestrictformat，gnucvalistarg）asm（isoc99vscanf）attribute（（format（scanf，1，0）））；externintvsscanf（constcharrestricts，constcharrestrictformat，gnucvalistarg）asm（isoc99vsscanf）attribute（（nothrow，leaf））attribute（（format（scanf，2，0）））；522usrincludestdio。h34externintfgetc（FILEstream）；externintgetc（FILEstream）；externintgetchar（void）；550usrincludestdio。h34externintgetcunlocked（FILEstream）；externintgetcharunlocked（void）；561usrincludestdio。h34externintfgetcunlocked（FILEstream）；externintfputc（intc，FILEstream）；externintputc（intc，FILEstream）；externintputchar（intc）；594usrincludestdio。h34externintfputcunlocked（intc，FILEstream）；externintputcunlocked（intc，FILEstream）；externintputcharunlocked（intc）；externintgetw（FILEstream）；externintputw（intw，FILEstream）；externcharfgets（charrestricts，intn，FILErestrictstream）；638usrincludestdio。h34externchargets（chars）attribute（（deprecated））；665usrincludestdio。h34externssizetgetdelim（charrestrictlineptr，sizetrestrictn，intdelimiter，FILErestrictstream）；externssizetgetdelim（charrestrictlineptr，sizetrestrictn，intdelimiter，FILErestrictstream）；externssizetgetline（charrestrictlineptr，sizetrestrictn，FILErestrictstream）；externintfputs（constcharrestricts，FILErestrictstream）；externintputs（constchars）；externintungetc（intc，FILEstream）；externsizetfread（voidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externsizetfwrite（constvoidrestrictptr，sizetsize，sizetn，FILErestricts）；737usrincludestdio。h34externsizetfreadunlocked（voidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externsizetfwriteunlocked（constvoidrestrictptr，sizetsize，sizetn，FILErestrictstream）；externintfseek（FILEstream，longintoff，intwhence）；externlongintftell（FILEstream）；externvoidrewind（FILEstream）；773usrincludestdio。h34externintfseeko（FILEstream，offtoff，intwhence）；externofftftello（FILEstream）；792usrincludestdio。h34externintfgetpos（FILErestrictstream，fpostrestrictpos）；externintfsetpos（FILEstream，constfpostpos）；815usrincludestdio。h34824usrincludestdio。h34externvoidclearerr（FILEstream）attribute（（nothrow，leaf））；externintfeof（FILEstream）attribute（（nothrow，leaf））；externintferror（FILEstream）attribute（（nothrow，leaf））；externvoidclearerrunlocked（FILEstream）attribute（（nothrow，leaf））；externintfeofunlocked（FILEstream）attribute（（nothrow，leaf））；externintferrorunlocked（FILEstream）attribute（（nothrow，leaf））；externvoidperror（constchars）；1usrincludebitssyserrlist。h13426usrincludebitssyserrlist。h34externconstcharconstsyserrlist〔〕；854usrincludestdio。h234externintfileno（FILEstream）attribute（（nothrow，leaf））；externintfilenounlocked（FILEstream）attribute（（nothrow，leaf））；873usrincludestdio。h34externFILEpopen（constcharcommand，constcharmodes）；externintpclose（FILEstream）；externcharctermid（chars）attribute（（nothrow，leaf））；913usrincludestdio。h34externvoidflockfile（FILEstream）attribute（（nothrow，leaf））；externintftrylockfile（FILEstream）attribute（（nothrow，leaf））；externvoidfunlockfile（FILEstream）attribute（（nothrow，leaf））；943usrincludestdio。h342HelloWorld。c2intmain（void）｛printf（HelloWorld）；return0；｝