c++ - how to initialize stringstream object -

i have stringstream object , wondering how initialize it.

stringstream os; for(int = 0; < 10; ++i){         value = rand() % 100;         os<<value;         cout<<os.str()<<" "<<os<<endl;         ntree->insert(os.str());         //i want os object initialized here     } 

if want new ostringstream object each time through loop, obvious solution declare new 1 @ top of loop. of ostream types contain lot of state, , depending on context, may more or less difficult reset of state.