cout << Account[i];

vector<Account> accounts;
cout << accounts[i];

ostream& operator<<(ostream& os, SavingAccount& Sav){

os << "BSB number: " << Sav.bsbNo << endl;
os << "Account Number: " << Sav.accountNo << endl;
os << "Name: " << Sav.name << endl;
os << "Address: " << Sav.address << endl;
os << "Phone: " << Sav.phone << endl;
os << "Balance: " << Sav.balance << endl;
os << "ATM card number: " << Sav.ATMcardNo << endl;
cout << endl;

//Set time

return os;

error: no match for ‘operator<<’ in ‘std::cout << ((Transaction*)this)->Transaction::accounts. std::vector<_Tp, _Alloc>::operator[] [with _Tp = Account, _Alloc = std::allocator<Account>](((long unsigned int)i))’