I need to check if name is same How can I check it?

[jchrono7]

I wrote function only How can I do add same name Ignore it??
this is same name don't ingore it.
How can I do Show up error??

struct b_customer {
	string Bank_name;
	string Last_Name;
	string First_Name;
	string Address;
	string City;
	string State;
	double Deposit;
	double Bonus;
	double Total;
	int Months;
};

void Add_Bank_customer (b_customer list [], int &size, int max, b_customer  &Temp){
	if (size < max)
	{
		cout << "\n\nPlease enter the data for Bank customer:\n";
			cout << "Enter first name: ";
	cin >> Temp.First_Name;
	cout << "Enter last name: ";
	cin >> Temp.Last_Name;
	cout << "Enter Address: ";
	cin.ignore();
	getline(cin, Temp.Address);
	cout << "Enter City: ";
	cin >> Temp.City;
	cout << "Enter State: ";
	cin >> Temp.State;
	cout << "Enter Deposit: ";
	cin >> Temp.Deposit;
	cout << "Enter Months: ";
	cin >> Temp.Months;
		Bouns(list[size]);
		size++;
		cout << "\n\n";
	}
	else
		cout << "Array is full, can't add any more bank customers.\n\n";
}

[coder777]

if(Temp.Last_Name == Temp.Last_Name)
  cout << "Error: the same last name" << endl;
else
{
  ...
}

if(Temp.Last_Name != Temp.Last_Name)
{
  ...
}
else
  cout << "Error: the same last name" << endl;