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Freeze dynamic buffer and return pointer to it

#include <strstream> #include <iostream> using namespace std; int main() {   char *p;   ostrstream outs;   outs << "AAAAAAAAAAAAAAAAAAAA";   outs << -10 << hex << " ";   outs.setf(ios::showbase);   outs << 100 << ends;   p = outs.str();   cout << p;   return 0; } AAAAAAAAAAAAAAAAAAAA-10 0x64"