ios_base typedef 成员与值的对照表

 

 fmtflags:
ios_base::skipws        =    0x1 =     1
ios_base::unitbuf       =    0x2 =     2
ios_base::uppercase     =    0x4 =     4
ios_base::showbase      =    0x8 =     8
ios_base::showpoint     =   0x10 =    16
ios_base::showpos       =   0x20 =    32
ios_base::left          =   0x40 =    64
ios_base::right         =   0x80 =   128
ios_base::internal      =  0x100 =   256
ios_base::dec           =  0x200 =   512
ios_base::oct           =  0x400 =  1024
ios_base::hex           =  0x800 =  2048
ios_base::scientific    = 0x1000 =  4096
ios_base::fixed         = 0x2000 =  8192
ios_base::boolalpha     = 0x4000 = 16384
ios_base::adjustfield   =  0x1c0 =   448
ios_base::basefield     =  0xe00 =  3584
ios_base::floatfield    = 0x3000 = 12288

event:
ios_base::erase_event   =      0 =     0
ios_base::imbue_event   =    0x1 =     1
ios_base::copyfmt_event =    0x2 =     2

iostate:
ios_base::goodbit       =      0 =     0
ios_base::eofbit        =    0x1 =     1
ios_base::failbit       =    0x2 =     2
ios_base::badbit        =    0x4 =     4

open mode:
ios_base::in            =    0x1 =     1
ios_base::out           =    0x2 =     2
ios_base::ate           =    0x4 =     4
ios_base::app           =    0x8 =     8
ios_base::trunc         =   0x10 =    16
ios_base::binary        =   0x20 =    32

seekdir:
ios_base::beg           =      0 =     0
ios_base::cur           =    0x1 =     1
ios_base::end           =    0x2 =     2