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Using a dynamically allocated ostringstream object

#include <iostream> #include <string> #include <sstream> using namespace std; main() {    ostringstream outputString;    string s1( "Output of several data types " ),           s2( "to an ostringstream object:" ),           s3( "\n        double: " ),           s4( "\n           int: " ),           s5( "\naddress of int: " );    double d = 123.4567;    int i = 22;    outputString << s1 << s2 << s3 << d << s4 << i << s5 << &i;    cout << "outputString contains:\n" << outputString.str();    outputString << "\nmore characters added";    cout << "\n\nafter additional stream insertions,\n"         << "outputString contains:\n" << outputString.str()          << endl;    return 0; }