std::basic_ostringstream::basic_ostringstream

explicit basic_ostringstream( ios_base::openmode mode = ios_base::out );

explicit basic_ostringstream( const std::basic_string<CharT,Traits,Allocator>& str,
                     ios_base::openmode mode = ios_base::out );

basic_ostringstream( basic_ostringstream&& other );

Constructs new string stream.

1) Constructs new underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(mode | ios_base::out).

2) Uses a copy of str as initial contents of the underlying string device. The underlying basic_stringbuf object is constructed as basic_stringbuf<Char,Traits,Allocator>(str, mode | ios_base::out).

3) Move constructor. Constructs the string stream with the state of other using move semantics.

Parameters

Example

#include <iostream>
#include <sstream>
int main()
{
    // default constructor (input/output stream)
    std::stringstream buf1;
    buf1 << 7;
    int n = 0;
    buf1 >> n;
    std::cout << "buf1 = " << buf1.str() << " n = " << n << '\n';
 
    // input stream
    std::istringstream inbuf("-10");
    inbuf >> n;
    std::cout << "n = " << n << '\n';
 
    // output stream in append mode (C++11)
    std::ostringstream buf2("test", std::ios_base::ate);
    buf2 << '1';
    std::cout << buf2.str() << '\n';
}

buf1 = 7 n = 7
n = -10
test1

See also