#include <iostream>
#include <array>

/*
 * Created by: Jason Sandoz @ CHC
 * Programming Challenge 2: Rainfall Statistics
 * This program calculates and displays the highest & lowest recorded rainfall for a 12 month period.
 * It also displays the average monthly rainfall in inches.
 *
 * *** Input validation: Users cannot enter negative values for rainfall ***
*/

// Jason Sandoz

void getAvg(std::array<double, 12> arr, int SIZE){ // Function to calculate average and total rain fall
    int i = 0;
    double avg, sum = 0;

    for(int i = 0; i < SIZE; i++){
        sum += arr[i];
    }

    avg = (sum / SIZE);

    std::cout << "The Average rainfall is: " << avg << " inches." << std::endl; // Display the average rainfall for the 12 months
    std::cout << "The total rainfall is: " << sum << " inches." << std::endl; // Display the total rainfall for the 12 months
}

void getHighest(std::array<double, 12> arr, int SIZE){
    double highestValue = arr[0];
    int highestMonth = 0;

    for(int i = 0; i < SIZE; i++){
        if(highestValue < arr[i]){
            highestValue = arr[i];
            highestMonth = i + 1;
        }
    }
         std::cout << "Month: " << highestMonth << " @ " <<  highestValue << " inches, is the highest value of rainfall.\n";
}

void getLowest(std::array<double, 12> arr, int SIZE){
    double lowestValue = arr[0];
    int lowestMonth = 1;

    for(int i = 0; i < SIZE; i++){
        if(lowestValue > arr[i]){
            lowestValue = arr[i];
            lowestMonth = i + 1;
        }
    }
         std::cout << "Month: " << lowestMonth  << " @ " <<  lowestValue << " inches, is the lowest value of rainfall.\n";
}

int main(){

    const int SIZE = 12; // 12 months in a year
    std::array<double, 12> totalRainFall; // create an array to store rainfall values

    for(int i = 0; i < SIZE; i++){ // loop through the array and populate.
        std::cout << "Please input the total rainfall for month: " << i + 1 << " in inches." << std::endl;
        std::cin >> totalRainFall[i];

        if(totalRainFall[i] < 0){ // check for negative input. (evaporation? :D)
            std::cout << "Error: rainfall cannot be negative.\n";
            return 0; // Kill the program if a user enters a negative number;
        }



    }

    getAvg(totalRainFall, SIZE); // Call our function to display averages and sums
    getHighest(totalRainFall, SIZE);  // Function call to get Highest rainfall
    getLowest(totalRainFall, SIZE); // Function Call to get Lowest rainfall
}