C++ Standard Library header files

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Standard Library header files

Language Support
<cstddef> <limits> <climits> <cfloat> <cstdint> <new> <typeinfo> <exception> <ciso646>	<initializer_list> <csignal> <csetjmp> <cstdalign> <cstdarg> <cstdbool> <cstdlib> <ctime>
Diagnostics
<stdexcept> <cassert>	<cerrno> <system_error>
General utilities
<utility> <tuple> <bitset> <memory> <cstdlib> <cstring> <functional>	<type_traits> <ratio> <chrono> <ctime> <scoped_allocator> <typeindex>
Strings
<string> <cctype> <cwctype> <cstring>	<cwchar> <cstdlib> <cuchar>
Localization
<locale> <codecvt> <clocale>

Containers
<array> <deque> <forward_list> <list> <vector>	<map> <set> <unordered_map> <unordered_set> <queue> <stack>
Iterators
<iterator>
Algorithms
<algorithm>	<cstdlib>
Numerics
<cfenv> <complex> <random> <valarray>	<numeric> <cmath> <ctgmath> <cstdlib>
Input/Output
<iosfwd> <iostream> <ios> <streambuf> <istream> <ostream>	<iomanip> <sstream> <fstream> <cstdio> <cinttypes>
Regular expressions
<regex>
Thread support
<thread> <mutex> <atomic>	<shared_mutex> <condition_variable> <future>

 

The interface of C++ standard library is defined by the following collection of header files.

Utilities library
<cstdlib>	General purpose utilities: program control, dynamic memory allocation, random numbers, sort and search
<csignal>	Functions and macro constants for signal management
<csetjmp>	Macro (and function) that saves (and jumps) to an execution context
<cstdarg>	Handling of variable length argument lists
<typeinfo>	Runtime type information utilities
<typeindex> (since C++11)	std::type_index
<type_traits> (since C++11)	Compile-time type information
<bitset>	std::bitset class template
<functional>	Function objects, designed for use with the standard algorithms
<utility>	Various utility components
<ctime>	C-style time/date utilites
<chrono> (since C++11)	C++ time utilites
<cstddef>	typedefs for types such as size_t, NULL and others
<initializer_list> (since C++11)	std::initializer_list class template
<tuple> (since C++11)	std::tuple class template
<any> (since C++17)	std::any class template
<optional> (since C++17)	std::optional class template
Dynamic memory management
<new>	Low-level memory management utilities
<memory>	Higher level memory management utilities
<scoped_allocator> (since C++11)	Nested allocator class
<memory_resource> (since C++17)	Polymorphic allocators and memory resources
Numeric limits
<climits>	limits of integral types
<cfloat>	limits of float types
<cstdint> (since C++11)	fixed-size types and limits of other types
<cinttypes> (since C++11)	formatting macros , intmax_t and uintmax_t math and conversions
<limits>	standardized way to query properties of arithmetic types
Error handling
<exception>	Exception handling utilities
<exception_list> (since C++17)	Exception handling for parallel algorithms
<stdexcept>	Standard exception objects
<cassert>	Conditionally compiled macro that compares its argument to zero
<system_error> (since C++11)	defines std::error_code, a platform-dependent error code
<cerrno>	Macro containing the last error number
Strings library
<cctype>	functions to determine the type contained in character data
<cwctype>	functions for determining the type of wide character data
<cstring>	various narrow character string handling functions
<cwchar>	various wide and multibyte string handling functions
<cuchar> (since C++11)	C-style Unicode character conversion functions
<string>	std::basic_string class template
<string_view> (since C++17)	std::basic_string_view class template
Containers library
<array> (since C++11)	std::array container
<vector>	std::vector container
<deque>	std::deque container
<list>	std::list container
<forward_list> (since C++11)	std::forward_list container
<set>	std::set and std::multiset associative containers
<map>	std::map and std::multimap associative containers
<unordered_set> (since C++11)	std::unordered_set and std::unordered_multiset unordered associative containers
<unordered_map> (since C++11)	std::unordered_map and std::unordered_multimap unordered associative containers
<stack>	std::stack container adaptor
<queue>	std::queue and std::priority_queue container adaptors
Algorithms library
<algorithm>	Algorithms that operate on containers
<execution_policy> (C++17)	Predefined execution policies for parallel versions of the algorithms
Iterators library
<iterator>	Container iterators
Numerics library
<cmath>	Common mathematics functions
<complex>	Complex number type
<valarray>	Class for representing and manipulating arrays of values
<random> (since C++11)	Random number generators and distributions
<numeric>	Numeric operations on values in containers
<ratio> (since C++11)	Compile-time rational arithmetic
<cfenv> (since C++11)	Floating-point environment access functions
Input/output library
<iosfwd>	forward declarations of all classes in the input/output library
<ios>	std::ios_base class, std::basic_ios class template and several typedefs
<istream>	std::basic_istream class template and several typedefs
<ostream>	std::basic_ostream, std::basic_iostream class templates and several typedefs
<iostream>	several standard stream objects
<fstream>	std::basic_fstream, std::basic_ifstream, std::basic_ofstream class templates and several typedefs
<sstream>	std::basic_stringstream, std::basic_istringstream, std::basic_ostringstream class templates and several typedefs
<strstream>	std::strstream, std::istrstream, std::ostrstream(deprecated)
<iomanip>	Helper functions to control the format or input and output
<streambuf>	std::basic_streambuf class template
<cstdio>	C-style input-output functions
Localization library
<locale>	Localization utilities
<clocale>	C localization utilities
<codecvt> (since C++11)	Unicode conversion facilities
Regular Expressions library
<regex> (since C++11)	Classes, algorithms and iterators to support regular expression processing
Atomic Operations library
<atomic> (since C++11)	Atomic operations library
Thread support library
<thread> (since C++11)	std::thread class and supporting functions
<mutex> (since C++11)	mutual exclusion primitives
<shared_mutex> (since C++14)	shared mutual exclusion primitives
<future> (since C++11)	primitives for asynchronous computations
<condition_variable> (since C++11)	thread waiting conditions
Filesystem library
<filesystem> (since C++17)	std::path class and supporting functions
Experimental libraries
<experimental/algorithm> (library fundamentals TS)	Standard libraries extensions and Extensions for Parallelism
<experimental/any> (library fundamentals TS)	Standard libraries extensions
<experimental/chrono> (library fundamentals TS)	Standard libraries extensions
<experimental/deque> (library fundamentals TS)	Standard libraries extensions
<experimental/execution_policy> (parallelism TS)	Extensions for Parallelism
<experimental/exception_list> (parallelism TS)	Extensions for Parallelism
<experimental/filesystem> (filesystem TS)	Filesystem library
<experimental/forward_list> (library fundamentals TS)	Standard libraries extensions
<experimental/future> (library fundamentals TS)	Standard libraries extensions
<experimental/list> (library fundamentals TS)	Standard libraries extensions
<experimental/functional> (library fundamentals TS)	Standard libraries extensions
<experimental/map> (library fundamentals TS)	Standard libraries extensions
<experimental/memory> (library fundamentals TS)	Standard libraries extensions
<experimental/memory_resource> (library fundamentals TS)	Standard libraries extensions
<experimental/numeric> (parallelism TS)	Extensions for Parallelism
<experimental/optional> (library fundamentals TS)	Standard libraries extensions
<experimental/ratio> (library fundamentals TS)	Standard libraries extensions
<experimental/regex> (library fundamentals TS)	Standard libraries extensions
<experimental/set> (library fundamentals TS)	Standard libraries extensions
<experimental/string> (library fundamentals TS)	Standard libraries extensions
<experimental/string_view> (library fundamentals TS)	Standard libraries extensions
<experimental/system_error> (library fundamentals TS)	Standard libraries extensions
<experimental/tuple> (library fundamentals TS)	Standard libraries extensions
<experimental/type_traits> (library fundamentals TS)	Standard libraries extensions
<experimental/unordered_map> (library fundamentals TS)	Standard libraries extensions
<experimental/unordered_set> (library fundamentals TS)	Standard libraries extensions
<experimental/utility> (library fundamentals TS)	Standard libraries extensions
<experimental/vector> (library fundamentals TS)	Standard libraries extensions
C compatibility headers
<ciso646>	empty header. The macros that appear in iso646.h in C are keywords in C++
<ccomplex> (since C++11)	simply includes the header <complex>
<ctgmath> (since C++11)	simply includes the headers <ccomplex> and <cmath>: the overloads equivalent to the contents of the C header tgmath.h are already provided by <cmath> and <complex>
<cstdalign> (since C++11)	defines one compatibility macro constant
<cstdbool> (since C++11)	defines one compatibility macro constant
Deprecated headers
<assert.h> (deprecated)	behaves as if each name from <cassert> is placed in global namespace
<complex.h> (deprecated)	behaves as if each name from <ccomplex> is placed in global namespace
<ctype.h> (deprecated)	behaves as if each name from <cctype> is placed in global namespace
<errno.h> (deprecated)	behaves as if each name from <cerrno> is placed in global namespace
<fenv.h> (deprecated)	behaves as if each name from <cfenv> is placed in global namespace
<float.h> (deprecated)	behaves as if each name from <cfloat> is placed in global namespace
<inttypes.h> (deprecated)	behaves as if each name from <cinttypes> is placed in global namespace
<iso646.h> (deprecated)	behaves as if each name from <ciso646> is placed in global namespace
<limits.h> (deprecated)	behaves as if each name from <climits> is placed in global namespace
<locale.h> (deprecated)	behaves as if each name from <clocale> is placed in global namespace
<math.h> (deprecated)	behaves as if each name from <cmath> is placed in global namespace
<setjmp.h> (deprecated)	behaves as if each name from <csetjmp> is placed in global namespace
<signal.h> (deprecated)	behaves as if each name from <csignal> is placed in global namespace
<stdalign.h> (deprecated)	behaves as if each name from <cstdalign> is placed in global namespace
<stdarg.h> (deprecated)	behaves as if each name from <cstdarg> is placed in global namespace
<stdbool.h> (deprecated)	behaves as if each name from <cstdbool> is placed in global namespace
<stddef.h> (deprecated)	behaves as if each name from <cstddef> is placed in global namespace
<stdint.h> (deprecated)	behaves as if each name from <cstdint> is placed in global namespace
<stdio.h> (deprecated)	behaves as if each name from <cstdio> is placed in global namespace
<stdlib.h> (deprecated)	behaves as if each name from <cstdlib> is placed in global namespace
<string.h> (deprecated)	behaves as if each name from <cstring> is placed in global namespace
<tgmath.h> (deprecated)	behaves as if each name from <ctgmath> is placed in global namespace
<time.h> (deprecated)	behaves as if each name from <ctime> is placed in global namespace
<uchar.h> (deprecated)	behaves as if each name from <cuchar> is placed in global namespace
<wchar.h> (deprecated)	behaves as if each name from <cwchar> is placed in global namespace
<wctype.h> (deprecated)	behaves as if each name from <cwctype> is placed in global namespace

See also

C documentation for C Standard Library header files