correct way to access an ID from a file ???

[lalala]

outStaffID.seekg(0);
outStaffID.read(reinterpret_cast<char*>(&StaffReg) , sizeof(StaffPersonal));
while(outStaffID && !outStaffID.eof())
{
outStaffID.read(reinterpret_cast<char*>(&StaffReg) , sizeof(StaffPersonal));
cout<<StaffReg.getStaffID();
outStaffID.close;

do {
SstaffID = (2 + rand() %3);

}while (SstaffID == StaffReg.getStaffID());

SstaffID = SstaffID;

from the above program... u can see that i cout the value of staff ID store in the file = cout<<StaffReg.getStaffID(); but the value is not as what i entered.. it will display something like .. 33... 03... 334... any1 can hlep me in this ?