loop excersize

#include <iostream>
using namespace std;

const int Months = 12;
const int Years = 3;

const char *months[Months] =
{
    "Jan.", "Feb.", "March", "April", "May", "June",
    "July", "August", "Sept.", "October", "Nov.", "Dec."
};

int main() {
    cout << "This program prompts the user to input sales for an entire year, by month.";
    cout << "\nThe data will be stored in a multi-dimensional array, with a month string";
    cout << "\nrow and a double sales row.";

    double salesInput[Months];
    double totalSales[Years][Months];
    int yearCounter = 1;
    double sumYear1 = 0, sumYear2 = 0, sumYear3 = 0, totalSum = 0;

    do {
        cout << "\n\nPlease input the sales for year " << yearCounter;
        cout << "\nPlease enter all 12 sales with a space in between each month" << endl;

        for (int i=0; i<Months; i++)
            cin >> salesInput[i];

        for (int i=0; i<Months; i++)
            totalSales[yearCounter-1][i] = salesInput[i];

        yearCounter++;

    } while (yearCounter<4);

    cout << "\n\nYour current monthly sales are for year 1:\n";

    for (int month=0; month<Months; ++month)
        cout << months[month] << "\t";
    cout << endl;
    for (int i=0;i<Months; i++)
        cout << totalSales[0][i] << "\t";

    cout << "\n\nYour current monthly sales are for year 2:\n";

    for (int month=0; month<Months; ++month)
        cout << months[month] << "\t";
    cout << endl;
    for (int i=0;i<Months; i++)
        cout << totalSales[1][i] << "\t";

    cout << "\n\nYour current monthly sales are for year 3:\n";

    for (int month=0; month<Months; ++month)
        cout << months[month] << "\t";
    cout << endl;
    for (int i=0;i<Months; i++)
        cout << totalSales[2][i] << "\t";

    cout << endl;

    for (int i=0; i<Years; i++) {
        for (int j=0; j<Months; j++) {
            if (i==0)
                sumYear1 = totalSales[i][j] + sumYear1;
            if (i==1)
                sumYear2 = totalSales[i][j] + sumYear2;
            if (i==2)
                sumYear3 = totalSales[i][j] + sumYear3;
        }
    }

    cout << "\nThe total for year 1 is: " << sumYear1 << " Dollars";
    cout << "\nThe total for year 2 is: " << sumYear2 << " Dollars";
    cout << "\nThe total for year 3 is: " << sumYear3 << " Dollars";
    cout << "\nThe total sum for all three years is " << sumYear1 + sumYear2 + sumYear3 << " Dollars" << endl;
    system("pause");
}