std::ostrstream::pcount
From cppreference.com
< cpp | io | ostrstream
| int pcount() const;
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Returns the number of characters that were output in the put area of the associated std::strstreambuf. Effectively calls rdbuf()->pcount()
Contents |
[edit] Parameters
(none)
[edit] Return value
The number of characters in the put area, or zero if nothing was output.
[edit] Example
Run this code
#include <strstream> #include <iostream> int main() { std::ostrstream dyn; // dynamically-allocated output buffer dyn << "Test: " << 1.23; std::cout << "The size of the output is " << dyn.pcount() << " and it holds \"" << dyn.str() << "\"\n"; dyn.freeze(false); char buf[10]; std::ostrstream user(buf, 10); // user-provided output buffer user << 1.23; // note: no std::ends std::cout.write(buf, user.pcount()); std::cout << '\n'; }
Output:
The size of the output is 10 and it holds "Test: 1.23" 1.23
[edit] See also
| returns the next pointer minus the beginning pointer in the output sequence: the number of characters written (public member function of std::strstreambuf)
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