C++ Programming/Standard Headers

Standard Headers Standard Template Library algorithm array atomic bitset chrono codecvt complex condition_variable deque exception forward_list fstream functional future initializer_list iomanip ios iosfwd iostream istream iterator limits list locale map memory mutex new numeric ostream queue random ratio regex set sstream stack stdexcept streambuf string strstream system_error thread tuple type_traits typeinfo typeindexIn C++11 only unordered_map unordered_set utility valarray vector and the Standard C Library cassert ccomplex cctype cerrno cfenv cfloat cinttypes ciso646 climits clocale cmath csetjmp csignal cstdalign cstdarg cstdbool cstddef cstdint cstdio cstdlib cstring ctgmath ctime cuchar cwchar cwctype cwstring "c++11" Everything inside C++'s standard library is kept in the std:: namespace. Old compilers may include headers with a .h suffix (e.g. the non-standard <iostream.h> vs. the standard <iostream>) instead of the standard headers. These names were common before the standardization of C++ and some compilers still include these headers for backwards compatibility. Rather than using the std:: namespace, these older headers pollute the global namespace and may otherwise only implement the standard in a limited way. Some vendors use the SGI STL headers. This was the first implementation of the standard template library. Non-standard but somewhat common C++ libraries stdiostream.hStreams based on FILE* from stdio.h. stream.hPrecursor to iostream. Old stream library mostly included for backwards compatibility even with old compilers. strstream.hUses char* whereas sstream uses string. Prefer the standard library sstream. C++ Programming: Language Standard Headers