Standard library header <ostream>

 

C++

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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)

 

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> <codectv> <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>

 

This header is part of the Input/output library.

Classes
basic_ostream	wraps a given abstract device (std::basic_streambuf) and provides high-level output interface (class template)
std::ostream	basic_ostream<char> (typedef)
std::wostream	basic_ostream<wchar_t> (typedef)
Functions
operator<<(std::basic_ostream)	inserts character data (function)
Manipulators
ends	outputs '\0' (function template)
flush	flushes the output stream (function template)
endl	outputs '\n' and flushes the output stream (function template)

Synopsis

namespace std {
    template <class charT, class traits = char_traits<charT> >
        class basic_ostream;
    typedef basic_ostream<char>    ostream;
    typedef basic_ostream<wchar_t> wostream;
 
    template <class charT, class traits>
        basic_ostream<charT,traits>& endl(basic_ostream<charT,traits>& os);
    template <class charT, class traits>
        basic_ostream<charT,traits>& ends(basic_ostream<charT,traits>& os);
    template <class charT, class traits>
        basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);
 
    template <class charT, class traits, class T>
        basic_ostream<charT, traits>&
        operator<<(basic_ostream<charT, traits>&& os, const T& x);
 
    // character inserters
    template<class charT, class traits>
        basic_ostream<charT,traits>& 
        operator<<(basic_ostream<charT,traits>&, charT);
    template<class charT, class traits>
        basic_ostream<charT,traits>& 
        operator<<(basic_ostream<charT,traits>&, char);
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, char);
 
    // signed and unsigned
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, signed char);
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, unsigned char);
    template<class charT, class traits>
        basic_ostream<charT,traits>& 
        operator<<(basic_ostream<charT,traits>&, const charT*);
    template<class charT, class traits>
        basic_ostream<charT,traits>& 
        operator<<(basic_ostream<charT,traits>&, const char*);
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, const char*);
 
    // signed and unsigned
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, const signed char*);
    template<class traits>
        basic_ostream<char,traits>& 
        operator<<(basic_ostream<char,traits>&, const unsigned char*);
}

Class std::basic_ostream

template <class charT, class traits = char_traits<charT> >
class basic_ostream : virtual public basic_ios<charT,traits> {
public:
    // types (inherited from basic_ios):
    typedef charT                     char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits                    traits_type;
 
    // Constructor/destructor:
    explicit basic_ostream(basic_streambuf<char_type,traits>* sb);
    virtual ~basic_ostream();
 
    // Prefix/suffix:
    class sentry;
 
    // Formatted output:
    basic_ostream<charT,traits>& operator<<(
        basic_ostream<charT,traits>& (*pf)(basic_ostream<charT,traits>&));
    basic_ostream<charT,traits>& operator<<(
        basic_ios<charT,traits>& (*pf)(basic_ios<charT,traits>&));
    basic_ostream<charT,traits>& operator<<(
        ios_base& (*pf)(ios_base&));
 
    basic_ostream<charT,traits>& operator<<(bool n);
    basic_ostream<charT,traits>& operator<<(short n);
    basic_ostream<charT,traits>& operator<<(unsigned short n);
    basic_ostream<charT,traits>& operator<<(int n);
    basic_ostream<charT,traits>& operator<<(unsigned int n);
    basic_ostream<charT,traits>& operator<<(long n);
    basic_ostream<charT,traits>& operator<<(unsigned long n);
    basic_ostream<charT,traits>& operator<<(long long n);
    basic_ostream<charT,traits>& operator<<(unsigned long long n);
    basic_ostream<charT,traits>& operator<<(float f);
    basic_ostream<charT,traits>& operator<<(double f);
    basic_ostream<charT,traits>& operator<<(long double f);
 
    basic_ostream<charT,traits>& operator<<(const void* p);
    basic_ostream<charT,traits>& operator<<(
        basic_streambuf<char_type,traits>* sb);
 
    // Unformatted output:
    basic_ostream<charT,traits>& put(char_type c);
    basic_ostream<charT,traits>& write(const char_type* s, streamsize n);
 
    basic_ostream<charT,traits>& flush();
 
    // seeks:
    pos_type tellp();
    basic_ostream<charT,traits>& seekp(pos_type);
    basic_ostream<charT,traits>& seekp(off_type, ios_base::seekdir);
 
protected:
    basic_ostream(const basic_ostream& rhs) = delete;
    basic_ostream(basic_ostream&& rhs);
 
    // Assign/swap
    basic_ostream& operator=(basic_ostream& rhs) = delete;
    basic_ostream& operator=(const basic_ostream&& rhs);
    void swap(basic_ostream& rhs);
};