| I/O manipulators | ||||
| Print functions(C++23) | ||||
| C-style I/O | ||||
| Buffers | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
| Streams | ||||
| Abstractions | ||||
| File I/O | ||||
| String I/O | ||||
| Array I/O | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
| Synchronized Output | ||||
(C++20) | ||||
| Types | ||||
streamsize | ||||
| Error category interface | ||||
(C++11) | ||||
(C++11) |
Defined in header <ios> | ||
typedef/*implementation-defined*/ streamsize; | ||
The typestd::streamsize is a signed integral type used to represent the number of characters transferred in an I/O operation or the size of an I/O buffer. It is used as a signed counterpart ofstd::size_t, similar to the POSIX typessize_t.
Except in the constructors ofstd::strstreambuf, negative values ofstd::streamsize are never used.
#include <iostream>#include <type_traits> static_assert(std::is_signed_v<std::streamsize>); int main(){std::cout<< sizeof(std::streamsize)<<'\n';}
Possible output:
8
| returns number of characters extracted by last unformatted input operation (public member function of std::basic_istream<CharT,Traits>)[edit] | |
| extracts and discards characters until the given character is found (public member function of std::basic_istream<CharT,Traits>)[edit] | |
| extracts blocks of characters (public member function of std::basic_istream<CharT,Traits>)[edit] | |
| inserts blocks of characters (public member function of std::basic_ostream<CharT,Traits>)[edit] |
