#include <fstream>
#include <string>

using namespace std;

int main ( int argc, char* argv[] )
{
   char outbuffer[8];
   ofstream out("passwd.dat");

 //random input from random file
   int where=0;
   cout<< "input 0 or 8: "; cin >>where;
   while(where==0 or where==8)
   {
	   cout << where <<"? " ; cin >>outbuffer;
	   out.seekp(where, ios::beg);
	   out.write(outbuffer, sizeof(outbuffer));
	   cout << out.tellp() << endl;
	   cout<< "input 0 or 8: "; cin >>where;
   }
   out.close();

   return 0;
}