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The latest version of this topic can be found at C++ Standard Library Header Files.
Header files for the Standard C++ Library and extensions, by category.
Algorithms [more information]
<algorithm>
C Library Wrappers
<cassert>, <cctype>, <cerrno>, <cfenv>, <cfloat>, <cinttypes>, <ciso646>, <climits>, <clocale>, <cmath>, <csetjmp>, <csignal>, <cstdarg>, <cstdbool>, <cstddef>, <cstdint>, <cstdio>, <cstdlib>, <cstring>, <ctgmath>, <ctime>, <cwchar>, <cwctype>
Containers [more information]
Sequence
<array>, <deque>, <forward_list>, <list>, <vector>
Ordered Associative
<map>, <set>
Unordered Associative
<unordered_map>, <unordered_set>
Error Handling [more information]
<exception>, <stdexcept>, <system_error>
Input/Output [more information]
<filesystem>, <fstream>, <iomanip>, <ios>, <iosfwd>, <iostream>, <istream>, <ostream>, <sstream>, <streambuf>, <strstream>
Iterators Library
<iterator>
Localization
<codecvt>, <cvt/wbuffer>, <cvt/wstring>, <locale>
Math and Numerics
<complex>, <limits>, <numeric>, <random>, <ratio>, <valarray>
Memory Management [more information]
<allocators>, <memory>, <new>, <scoped_allocator>
Multithreading
<atomic>, <condition_variable>, <future>, <mutex>, <shared_mutex>, <thread>
Other Utilities
<bitset>, <chrono>, <functional>, <initializer_list>, <tuple>, <type_traits>, <typeinfo>, <typeindex>, <utility>
Strings and Character Data
<regex>, <string>