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+[fmtflags.state]
+
+# 31 Input/output library [[input.output]](./#input.output)
+
+## 31.5 Iostreams base classes [[iostreams.base]](iostreams.base#fmtflags.state)
+
+### 31.5.2 Class ios_base [[ios.base]](ios.base#fmtflags.state)
+
+#### 31.5.2.3 State functions [fmtflags.state]
+
+[ð](#lib:flags,ios_base)
+
+`fmtflags flags() const;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1188)
+
+*Returns*: The format control information for both input and output[.](#1.sentence-1)
+
+[ð](#lib:flags,ios_base_)
+
+`fmtflags flags(fmtflags fmtfl);
+`
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1199)
+
+*Postconditions*: fmtfl == flags()[.](#2.sentence-1)
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1203)
+
+*Returns*: The previous value offlags()[.](#3.sentence-1)
+
+[ð](#lib:setf,ios_base)
+
+`fmtflags setf(fmtflags fmtfl);
+`
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1215)
+
+*Effects*: Sets fmtfl inflags()[.](#4.sentence-1)
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1220)
+
+*Returns*: The previous value offlags()[.](#5.sentence-1)
+
+[ð](#lib:setf,ios_base_)
+
+`fmtflags setf(fmtflags fmtfl, fmtflags mask);
+`
+
+[6](#6)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1232)
+
+*Effects*: Clears mask inflags(),
+setsfmtfl & mask inflags()[.](#6.sentence-1)
+
+[7](#7)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1241)
+
+*Returns*: The previous value offlags()[.](#7.sentence-1)
+
+[ð](#lib:unsetf,ios_base)
+
+`void unsetf(fmtflags mask);
+`
+
+[8](#8)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1253)
+
+*Effects*: Clears mask inflags()[.](#8.sentence-1)
+
+[ð](#lib:precision,ios_base)
+
+`streamsize precision() const;
+`
+
+[9](#9)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1265)
+
+*Returns*: The precision
+to generate on certain output conversions[.](#9.sentence-1)
+
+[ð](#lib:precision,ios_base_)
+
+`streamsize precision(streamsize prec);
+`
+
+[10](#10)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1277)
+
+*Postconditions*: prec == precision()[.](#10.sentence-1)
+
+[11](#11)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1281)
+
+*Returns*: The previous value ofprecision()[.](#11.sentence-1)
+
+[ð](#lib:width,ios_base)
+
+`streamsize width() const;
+`
+
+[12](#12)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1293)
+
+*Returns*: The minimum field width (number of characters) to generate on certain output
+conversions[.](#12.sentence-1)
+
+[ð](#lib:width,ios_base_)
+
+`streamsize width(streamsize wide);
+`
+
+[13](#13)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1305)
+
+*Postconditions*: wide == width()[.](#13.sentence-1)
+
+[14](#14)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L1309)
+
+*Returns*: The previous value ofwidth()[.](#14.sentence-1)