std::ios_base::fmtflags - cppreference.com (original) (raw)
| typedef /*implementation defined*/ fmtflags; | | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | | | | static constexpr fmtflags dec = /*implementation defined*/ static constexpr fmtflags oct = /*implementation defined*/ static constexpr fmtflags hex = /*implementation defined*/ static constexpr fmtflags basefield = dec | oct | hex; | | | | static constexpr fmtflags left = /*implementation defined*/ static constexpr fmtflags right = /*implementation defined*/ static constexpr fmtflags internal = /*implementation defined*/ static constexpr fmtflags adjustfield = left | right | internal; | | | | static constexpr fmtflags scientific = /*implementation defined*/ static constexpr fmtflags fixed = /*implementation defined*/ static constexpr fmtflags floatfield = scientific | fixed; | | | | | static constexpr fmtflags boolalpha = /*implementation defined*/ static constexpr fmtflags showbase = /*implementation defined*/ static constexpr fmtflags showpoint = /*implementation defined*/ static constexpr fmtflags showpos = /*implementation defined*/ static constexpr fmtflags skipws = /*implementation defined*/ static constexpr fmtflags unitbuf = /*implementation defined*/ static constexpr fmtflags uppercase = /*implementation defined*/ | | | |
Specifies available formatting flags. It is a BitmaskType. The following constants are defined:
| Constant | Explanation | |
|---|---|---|
| dec | use decimal base for integer I/O: see std::dec | |
| oct | use octal base for integer I/O: see std::oct | |
| hex | use hexadecimal base for integer I/O: see std::hex | |
| basefield | dec | oct | hex. Useful for masking operations |
| left | left adjustment (adds fill characters to the right): see std::left | |
| right | right adjustment (adds fill characters to the left): see std::right | |
| internal | internal adjustment (adds fill characters to the internal designated point): see std::internal | |
| adjustfield | left | right | internal. Useful for masking operations |
| scientific | generate floating point types using scientific notation, or hex notation if combined with fixed: see std::scientific | |
| fixed | generate floating point types using fixed notation, or hex notation if combined with scientific: see std::fixed | |
| floatfield | scientific | fixed. Useful for masking operations | |
| boolalpha | insert and extract bool type in alphanumeric format: see std::boolalpha | |
| showbase | generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O: see std::showbase | |
| showpoint | generate a decimal-point character unconditionally for floating-point number output: see std::showpoint | |
| showpos | generate a + character for non-negative numeric output: see std::showpos | |
| skipws | skip leading whitespace before certain input operations: see std::skipws | |
| unitbuf | flush the output after each output operation: see std::unitbuf | |
| uppercase | replace certain lowercase letters with their uppercase equivalents in certain output operations: see std::uppercase |
[edit] Example
The following example shows several different ways to print the same result.
Output:
[edit] See also
| flags | manages format flags (public member function) [edit] |
|---|---|
| setf | sets specific format flag (public member function) [edit] |
| unsetf | clears specific format flag (public member function) [edit] |
| setbase | changes the base used for integer I/O (function) [edit] |
| setfill | changes the fill character (function template) [edit] |
| fixedscientifichexfloatdefaultfloat(C++11)(C++11) | changes formatting used for floating-point I/O (function) [edit] |
| showbasenoshowbase | controls whether prefix is used to indicate numeric base (function) [edit] |
| boolalphanoboolalpha | switches between textual and numeric representation of booleans (function) [edit] |
| showposnoshowpos | controls whether the + sign used with non-negative numbers (function) [edit] |
| showpointnoshowpoint | controls whether decimal point is always included in floating-point representation (function) [edit] |
| unitbufnounitbuf | controls whether output is flushed after each operation (function) [edit] |
| skipwsnoskipws | controls whether leading whitespace is skipped on input (function) [edit] |
| uppercasenouppercase | controls whether uppercase characters are used with some output formats (function) [edit] |