C-String to Integer CS311

#include <iostream>
#include <cstdlib>
#include <cctype>
using namespace std;
void readAndClean (int& n);
void newLine();

void readAndClean (int& n)
{
    const int ARRAY_SIZE = 6;
    char digitString[ARRAY_SIZE];

    char next;
    cin.get(next);
    int index = 0;
    while (next != '\n')
    {
        if ((isdigit(next)) && (index < ARRAY_SIZE - 1))
        {
            digitString[index] = next;
            index++;
        }
        cin.get(next);
    }
    digitString[index] = '\0';
    n = atoi(digitString);
}
void newLine()
{
    char symbol;
    do
    {
        cin.get(symbol);
    }
    while (symbol != '\n');
}
int main()
{
   int n;
   char ans;
   do
   {
       cout<<"Enter an integer and press Return: ";
       readAndClean(n);
       cout <<"That string converts to the integer " << n <<endl;
       cout <<"Again? (yes/no): ";
       cin>> ans;
       newLine();
   }
   while ( (ans != 'n') && (ans != 'N') );
   return 0;
}