#include <iostream>
#include <sstream>
#include <string>
using namespace std;

int main()
{
  string q;
  int a = 3;
  int b = 6;

  ostringstream s;
  s << a << " hi " << b;
  q = s.str();
  const char *buf = q.c_str();
  cout << buf << endl;

  char buf2[256];
  //%d integers
  //%c characters
  //%s is cstrings (never use "string" here, only cstrings)
  //%s is used with strings with the c_str()
  //%f is floats
  sprintf(buf2, "%d hi %d", a,b);
  cout << buf2 << endl;

}