explicit ostringstream ( openmode which = ios_base::out );
explicit ostringstream ( const string & str, openmode which = ios_base::out );
Construct an object and optionally initialize its content
Constructs an object of class ostringstream including the initialization of the associated stringbuf object and the call to its base class's constructor with the initialized stringbuf object as constructor parameter.
Additionally, in case that the second constructor version is used, the stream's buffer is initialized with the content of the string object str as if a call to member str.
Parameters
- which
- Bitmask with the requested i/o mode for the string buffer. This is an object of type ios_base::openmode. It generally consists of a combination of one or more the following flags (which are member constants):
| flag value | opening mode |
|---|
| app | (append) Set the stream's position indicator to the end of the stream before each output operation. |
| ate | (at end) Set the stream's position indicator to the end of the stream on opening. |
| binary | (binary) Consider stream as binary rather than text. |
| in | (input) Allow input operations on the stream. |
| out | (output) Allow output operations on the stream. |
| trunc | (truncate) Any current content is discarded, assuming a length of zero on opening. |
- str
- string object to be copied as the initial value for the internal buffer string.
Return Value
none
Example
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// using ostringstream constructors.
#include <iostream>
#include <sstream>
using namespace std;
int main () {
ostringstream oss (ostringstream::out);
oss << "This is a test\n";
cout << oss.str();
return 0;
}
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Basic template member declaration
( basic_ostringstream<charT,traits,Allocator> )
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explicit basic_ostringstream ( openmode which = ios_base::out );
explicit basic_ostringstream ( const basic_string<charT,traits,Allocator> * str,
openmode which = ios_base::out );
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See also
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