std::ostrstream::pcount (3) - Linux Manuals

std::ostrstream::pcount: std::ostrstream::pcount

NAME

std::ostrstream::pcount - std::ostrstream::pcount

Synopsis

int pcount() const;

Returns the number of characters that were output in the put area of the associated std::strstreambuf. Effectively calls rdbuf()->pcount()

Parameters

(none)

Return value

The number of characters in the put area, or zero if nothing was output.

Example

// Run this code

  #include <strstream>
  #include <iostream>

  int main()
  {
      std::ostrstream dyn; // dynamically-allocated output buffer
      dyn << "Test: " << 1.23 << std::ends;
      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 11 and it holds "Test: 1.23"
  1.23