##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::strstreambuf::pcount

From cppreference.com
< cpp‎ | io‎ | strstreambuf

int pcount() const; |  |

Returns the number of characters written to the output sequence.

If the next pointer for the put area (std::streambuf::pptr()) is a null pointer, returns zero.

Otherwise, returns the next pointer in the put area minus the beginning pointer in the put area, that is pptr() - pbase()

### [edit] Parameters

(none)

### [edit] Return value

The number of characters written to the put area.

### [edit] Example

Run this code

    #include <strstream>
    #include <iostream>

    int main()
    {
        std::strstream dyn; // dynamically-allocated output buffer
        dyn << "Test: " << 1.23 << std::ends;
        std::strstreambuf* buf = dyn.rdbuf();
        std::cout << "The size of the output is "
                  << buf->pcount() // or just buf.pcount()
                  << " and it holds \"" << dyn.str() << "\"\n";
        dyn.freeze(false); // after calling .str() on a dynamic strstream

        char arr[10];
        std::ostrstream user(arr, 10); // user-provided output buffer
        buf = user.rdbuf();
        user << 1.23; // note: no std::ends
        std::cout.write(arr, buf->pcount()); // or just user.pcount()
        std::cout << '\n';

        std::istrstream lit("1 2 3"); // read-only fixed-size buffer
        buf = lit.rdbuf();
        // istrstream has no member pcount(), so lit.pcount() won't work
        std::cout << "Input-only pcount() = " << buf->pcount() << '\n';
    }

Output:

    The size of the output is 11 and it holds "Test: 1.23"
    1.23
    Input-only pcount() = 0

### [edit] See also

pcount | obtains the number of characters written (public member function of `std::strstream`) [edit]
pcount | obtains the number of characters written (public member function of `std::ostrstream`) [edit]

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/io/strstreambuf/pcount&oldid=85056"