[floatfield.manip]

# 31 Input/output library [[input.output]](./#input.output)

## 31.5 Iostreams base classes [[iostreams.base]](iostreams.base#floatfield.manip)

### 31.5.5 ios_base manipulators [[std.ios.manip]](std.ios.manip#floatfield.manip)

#### 31.5.5.4 floatfield manipulators [floatfield.manip]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2750)

Each function specified in this subclause
is a designated addressable function ([[namespace.std]](namespace.std "16.4.5.2.1 Namespace std"))[.](#1.sentence-1)

[🔗](#lib:fixed)

`ios_base& fixed(ios_base& str);
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2760)

*Effects*: Callsstr.setf(ios_base​::​fixed, ios_base​::​floatfield)[.](#2.sentence-1)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2765)

*Returns*: str[.](#3.sentence-1)

[🔗](#lib:scientific)

`ios_base& scientific(ios_base& str);
`

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2776)

*Effects*: Callsstr.setf(ios_base​::​scientific, ios_base​::​floatfield)[.](#4.sentence-1)

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2781)

*Returns*: str[.](#5.sentence-1)

[🔗](#lib:hexfloat)

`ios_base& hexfloat(ios_base& str);
`

[6](#6)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2792)

*Effects*: Calls str.setf(ios_base​::​fixed | ios_base​::​scientific,
 ios_base​::​floatfield)[.](#6.sentence-1)

[7](#7)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2797)

*Returns*: str[.](#7.sentence-1)

[8](#8)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2802)

[*Note [1](#note-1)*:

ios_base​::​hex cannot be used to specify
a hexadecimal floating-point format,
because it is not part of ios_base​::​floatfield (Table [137](ios.fmtflags#tab:ios.fmtflags.const "Table 137: fmtflags constants"))[.](#8.sentence-1)

— *end note*]

[🔗](#lib:defaultfloat)

`ios_base& defaultfloat(ios_base& str);
`

[9](#9)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2816)

*Effects*: Calls str.unsetf(ios_base​::​floatfield)[.](#9.sentence-1)

[10](#10)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L2820)

*Returns*: str[.](#10.sentence-1)