C++ Example 2

#include<iostream>
#include <iomanip>
using namespace std;

const int NUM_MONTHS = 12;

double getTotal(double[]);
double getAverage(double[]);
double getLargest(double[], int &);
double getSmallest(double[], int &);


int main()
{
    double rainFall[NUM_MONTHS];

    for (int month = 0; month < NUM_MONTHS; month++)
    {
        cout << "Enter the rainfall for month ";
        cout << (month + 1) << ": ";
        cin >> rainFall[month];

        while (rainFall[month] < 0)
        {
            cout << "Rainfall must be 0 or more.\n"
                << "Please re-enter: ";
            cin >> rainFall[month];
        }
    }

    cout << fixed << showpoint << setprecision(2) << endl;

    cout << "The total rainfall for the year is ";
    cout << getTotal(rainFall)
        << " inches." << endl;

    cout << "The average rainfall for the year is ";
    cout << getAverage(rainFall)
        << " inches." << endl;

    int subScript = 0;

    cout << "The largest amount of rainfall was ";
    cout << getLargest(rainFall, subScript)
        << " inches in month ";
    cout << (subScript + 1) << "." << endl;

    cout << "The smallest amount of rainfall was ";
    cout << getSmallest(rainFall, subScript)
        << " inches in month ";
    cout << (subScript + 1) << "." << endl << endl;

    return 0;
}

double getTotal(double rainFall[])
{
    double total = 0;
    for (int count = 0; count < NUM_MONTHS; count++)
        total += rainFall[count];
    return total;
}

double getAverage(double rainFall[])
{
    double average = 0.0;
    average = getTotal(rainFall) / NUM_MONTHS;
    return average;
}

double getLargest(double rainFall[], int &subscript)
{
    double largest;
    largest = rainFall[0];

    for (int month = 0; month < NUM_MONTHS; month++){
        if (rainFall[month] > largest){
            largest = rainFall[month];
            subscript = month;
        }
    }

    return largest;
}

double getSmallest(double rainFall[], int &subscript)
{
    double smallest;
    smallest = rainFall[0];

    for (int month = 0; month < NUM_MONTHS; month++){
        if (rainFall[month] < smallest){
            smallest = rainFall[month];
            subscript = month;
        }
    }
    return smallest;
}