std::basic_ostream::tellp - cppreference.com

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# std::basic_ostream::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).

### [edit] Parameters

(none)

### [edit] Return value

current output position indicator on success, pos_type(-1) if a failure occurs.

### [edit] 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

### [edit] See also

seekp | sets the output position indicator (public member function) [edit]
tellg | returns the input position indicator (public member function of `std::basic_istream`) [edit]
seekg | sets the input position indicator (public member function of `std::basic_istream`) [edit]

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