String Array problem

[juanmiindset]

So I have two issues I cant seem to figure out the first one is when I run my program once it works fine but when they click "Y" to run it again it only lets them input 3 instead of the original 4. I know it involves using cin.ignore() but where does it go? also im having issues displaying the array in reverse order

 #include <iostream>
#include <string>
#include <iomanip>

using namespace std;

const int SIZE = 4;

void getCities(string cities[], int SIZE);
char getChoice();
void displayInOrder(string cities[], int SIZE);
void displayInReverse(string cities[], int SIZE);

int main()
{

	string cities[SIZE] ;
	char selection;
	char answer;

	do {
		getCities(cities, SIZE);
		selection = getChoice();

		if (toupper(selection) == 'O')
		{
			displayInOrder(cities, SIZE);
		}

		else if (toupper(selection) == 'R')
		{
			displayInReverse(cities, SIZE);
		}

		else
		{
			cout << "Invalid selection - Must choose O or R";
		}

		cout << endl << endl << "Do you want to do this again? (Y/N): ";
		cin >> answer;

	} while (toupper(answer) == 'Y');
	
	

	return 0;
}

void getCities(string cities[], int SIZE)
{
	cout << "Enter 4 Cities:\n";

	for (int i = 0; i < SIZE; i++)
	{
		
		getline(cin, cities[i]);

	}


}

char getChoice()
{
	char choice;
	cout << "How do you want the cities displayed?\n";
	cout << "\nEnter \"O\" for in order, or enter \"R\" for in reverse order: ";
	cin >> choice;
   
	return choice;
}

void displayInOrder(string cities[], int SIZE)
{
	for (int i = 0; i < SIZE; i++)
	{

		cout << endl << cities[i];

	}

}

void displayInReverse(string cities[], int SIZE)
{
	for (int i = 4; i > SIZE; i--)
	{

		cout << endl << cities[i];

	}

}