std::basic_ostream<CharT,Traits>::tellp
From cppreference.com
< cpp | io | basic ostream
| pos_type tellp(); |
||
Returns the output position indicator of the current associated streambuf object.
|
Behaves as UnformattedOutputFunction (except without actually performing output). After constructing and checking the sentry object, |
(since C++11) |
If fail()==true, returns pos_type(-1). Otherwise, returns rdbuf()->pubseekoff(0, std::ios_base::cur, std::ios_base::out).
Parameters
(none)
Return value
current output position indicator on success, pos_type(-1) if a failure occurs.
Example
Run this code
#include <iostream> #include <sstream> int main() { std::ostringstream s; std::cout << s.tellp() << '\n'; s << 'h'; std::cout << s.tellp() << '\n'; s << "ello, world "; std::cout << s.tellp() << '\n'; s << 3.14 << '\n'; std::cout << s.tellp() << '\n' << s.str(); }
Output:
0 1 13 18 hello, world 3.14
See also
| sets the output position indicator (public member function) | |
| returns the input position indicator (public member function of std::basic_istream<CharT,Traits>) | |
| sets the input position indicator (public member function of std::basic_istream<CharT,Traits>) |