Answer:
#include<iostream>
#include <iomanip>
using namespace std;
const int NUM_MONTHS = 12;
double getTotal(double [], int);
double getAverage(double [], int);
double getLargest(double [], int, int &);
double getSmallest(double [], int, int &);
double getTotal(int rainFall,double NUM_MONTHS[])
{
double total = 0;
for (int count = 0; count < NUM_MONTH; count++)
total += NUM_MONTH[count];
return total;
}
double getAverage(int rainFall,double NUM_MONTH[])
{getTotal(rainFall,NUM_MONTH)
average= total/NUM_MONTHS;
return average;
}
double getHighest(int rainFall, double NUM_MONTHS[]) //I left out the subScript peice as I was not sure how to procede with that;
{
double largest;
largest = NUM_MONTHS[0];
for ( int month = 1; month <= NUM_MONTHS; month++ ){
                      if ( values[month] > largest ){
                  largest = values[month];
return largest;
           }
double getSmallest(int rainFall, double NUM_MONTHS[])
{
double smallest;
smallest = NUM_MONTHS[0];
for ( int month = 1; month <= NUM_MONTHS; month){
                      if ( values[month] < smallest ){
                  smallest = values[month];
return smallest;
           }
  
int main()
{
double rainFall[NUM_MONTHS];
  for (int month = 0; month < NUM_MONTHS; month++)
   {
      cout << "Enter the rainfall (in inches) 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, NUM_MONTHS)
       << " inches." << endl;
    cout << "The average rainfall for the year is ";
   cout << getAverage(rainFall, NUM_MONTHS)
       << " inches." << endl;
    int subScript;
 cout << "The largest amount of rainfall was ";
   cout << getLargest(rainFall, NUM_MONTHS, subScript)
       << " inches in month ";
   cout << (subScript + 1) << "." << endl;
   cout << "The smallest amount of rainfall was ";
   cout << getSmallest(rainFall, NUM_MONTHS, subScript)
       << " inches in month ";
   cout << (subScript + 1) << "." << endl << endl;
   return 0;
}