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

int main ()
{
  string str;
  string str2="Writing ";
  string str3="print 10 and then 5 more";

  str.append(str2);                       // "Writing "
  assert(str == "Writing ");
  cout << str << endl;
  return 0;
}
