Lab 7, part 3

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

const int rows = 3;
const int cols = 5;

void err(int);
void mega(int[rows][cols], double&, double&, double&);

int main()
{
    cout << "\t\t\t<<< Monkey Food Tracker >>>\n";
    char again = 'y';
    while (again == 'y' || again == 'Y'){
        int megaRay[rows][cols], meat = 0;

        //Input Block
        for (int r = 0; r < rows; r++){
            cout << "\n\t\t\t ## Monkey " << r + 1 << " Food Eaten ##\n";
            for (int c = 0; c < cols; c++){
                cout << "Day " << c + 1 << ": ";
                cin >> meat;

                //check meat input for letters and negatives
                while (cin.fail() || meat < 1){
                    err(meat);
                    cout << "Day " << c + 1 << ": ";
                    cin >> meat;
                }
                megaRay[r][c] = meat; //assign meat to array position
            }
        }

        double avgm = 0, least = 0, greatest = 0;
        mega(megaRay, avgm, least, greatest);
        cout << "\nAverage amount of food eaten: " << avgm << endl
            << "The least amount of food eaten: " << least << endl
            << "The greatest amount of food eaten: " << greatest << endl;

        cout << "\n\t\tEnter y or Y to go again: ";
        cin >> again;
    }
}

void err(int meatIn){ //fix letter or negative number
    if (cin.fail())
        cout << "\t\t/!\\ Not a number /!\\\n";
    else if (meatIn < 1)
        cout << "\t\t/!\\ Negative number /!\\\n";
    cin.clear();
    fflush(stdin);
}

void mega(int mRay[rows][cols], double& avgOut, double& min, double& max){ //number of days is scalable
    double m1 = 0, m2 = 0, m3 = 0;
    for (int i = 0; i < rows; i++){
        if (i == 0){
            for (int j = 0; j < cols; j++)
                m1 += mRay[i][j];
        }
        else if (i == 1){
            for (int k = 0; k < cols; k++)
                m2 += mRay[i][k];
        }
        else if (i == 2){
            for (int l = 0; l < cols; l++)
                m3 += mRay[i][l];
        }
    }
    avgOut = (m1 + m2 + m3) / (cols * 3);

    //min
    if (m1 < m2 && m1 < m3)
        min = m1;
    else if (m2 < m1 && m2 < m3)
        min = m2;
    else if (m3 < m1 && m3 < m2)
        min = m3;

    //max
    if (m1 > m2 && m1 > m3)
        max = m1;
    else if (m2 > m1 && m2 > m3)
        max = m2;
    else if (m3 > m1 && m3 > m2)
        max = m3;
}