如果是iso文件，用虚拟光驱加载后安装；如果是压缩包，解压缩后安装。
如果你已将装过vc，安装后会自动链接上去，选中某个关键字，按F1就可以了。
否则在开始菜单里有MSDN的快捷方式，打开就跟在 http://msdn.microsoft.com 差不多。
如果你对上面任何词没有概念，自己去google搜索以下：）
ios_base::fmtflags
boolalpha, to insert or extract objects of type bool as names (such as true and false) rather than as numeric values.
dec, to insert or extract integer values in decimal format.
fixed, to insert floating-point values in fixed-point format (with no exponent field).
hex, to insert or extract integer values in hexadecimal format.
internal, to pad to a field width as needed by inserting fill characters at a point internal to a generated numeric field.
left, to pad to a field width as needed by inserting fill characters at the end of a generated field (left justification).
oct, to insert or extract integer values in octal format.
right, to pad to a field width as needed by inserting fill characters at the beginning of a generated field (right justification).
scientific, to insert floating-point values in scientific format (with an exponent field).
showbase, to insert a prefix that reveals the base of a generated integer field.
showpoint, to insert a decimal point unconditionally in a generated floating-point field.
showpos, to insert a plus sign in a nonnegative generated numeric field.
skipws, to skip leading white space before certain extractions.
unitbuf, to flush output after each insertion.
uppercase, to insert uppercase equivalents of lowercase letters in certain insertions.
In addition, several useful values are:
adjustfield, where internal | left | right
basefield, where dec | hex | oct
floatfield, where fixed | scientific
