std::strstreambuf::pcount
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< cpp | io | strstreambuf
C++
Input/output library
| I/O manipulators | ||||
| Print functions (C++23) | ||||
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(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
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| File I/O | ||||
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(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
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(C++20) | ||||
| Types | ||||
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(C++11) | ||||
(C++11) |
std::strstreambuf
| Public member functions | ||||
strstreambuf::pcount | ||||
| Protected member functions | ||||
| int pcount() const; |
(deprecated in C++98) (removed in C++26) |
|
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().
Contents |
[edit] Parameters
(none)
[edit] Return value
The number of characters written to the put area.
[edit] Example
Run this code
#include <iostream> #include <strstream> 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
| obtains the number of characters written (public member function of std::strstream) [edit]
| |
| obtains the number of characters written (public member function of std::ostrstream) [edit]
|
