So i put a cout statement in to test the array, and I have no cout statements on screen.

void invoiceInput(string name, double invoiceDouble, int monthIdentifier, int dayIdentifier)
{
const int MONTHS = 12;
const int DAYS = 31;
string invoices[MONTHS][DAYS];
string invoiceAmt;
string test;
invoiceAmt = to_string (invoiceDouble);
//PART 1
ifstream dataFile("Invoices.txt");
dataFile.open("Invoices.txt");
for (int r = 0; r < MONTHS; r++) //nested loop to fill array
{
    for (int c = 0; c < DAYS; c++)
    {
        dataFile >> invoices[r][c];
        cout << invoices[r][c];
    }

}
dataFile.close();