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Supports the manipulators in ios.

The type is a bitmask type T1 that describes an object that can store format flags. The distinct flag values (elements) are:

• dec, to insert or extract integer values in decimal format.

• hex, to insert or extract integer values in hexadecimal format.

• oct, to insert or extract integer values in octal format.

• showbase, to insert a prefix that reveals the base of a generated integer field.

• internal, to pad to a field width as needed by inserting fill characters at a point internal to a generated numeric field. (For information on setting the field width, see setw).

• left, to pad to a field width as needed by inserting fill characters at the end of a generated field (left justification).

• right, to pad to a field width as needed by inserting fill characters at the beginning of a generated field (right justification).

• boolalpha, to insert or extract objects of type bool as names (such as true and false) rather than as numeric values.

• fixed, to insert floating-point values in fixed-point format (with no exponent field).

• scientific, to insert floating-point values in scientific format (with an exponent 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, a bitmask defined as internal | left | right

• basefield, defined as dec | hex | oct

• floatfield, defined as fixed | scientific
  
  以上是MSDN的说明,但是我没有看到楼住要的东西,请自己写函数进行转换