int arr [20];

int maximum;
int* maxPtr = &maximum;
int minimum;
int* minPtr = &minimum;
float average;
float* avPtr = &average;

/*fill the array*/

/*now you'd call the function that had
   a prototype like so:
  void doAll(int[] array, int*min, int*max, float*av)
*/

doAll(arr, minPtr,maxPtr,avPtr);

/*print out the three values which have been set by doAll*/

void doAll(int[] array, int*min, int*max, float*av)
{
  /*sort array*/
  *min = array[0];
  *max = array[19];
  *float = /*the average you calculated*/
}

#include <time.h>
#include <iostream>
#include <time.h>
#include <iomanip>

using namespace std;

void fill(int *palex, int n);
void print(int *palex, int n);
int max(int *palex, int n);
int min(int *palex, int n);
float average(int *palex, int n);
void main(void)
{
    int n;
    cout<<"Enter a number of elements: ";
    cin>>n;
    cout<<endl;
    int *palex = new int[n];
    fill(palex, n);
    cout<<"Below are elements of this array: ";
    cout<<endl<<endl;
    print(palex, n);
    cout<<endl<<endl;
    cout<<"Maximum value of an array: "<<endl<<endl<<max(palex, n);
    cout<<endl<<endl;
    cout<<"Minimum value of an array: "<<endl<<endl<<min(palex, n);
    cout<<endl<<endl;
    cout<<"An average value of an array: "<<endl<<endl<<average(palex, n);
    cout<<endl<<endl;
    return;
}

void fill(int *palex, int n)
{
    srand(time(NULL));
    for (int i = 0; i < n; i++)
    {
        *(palex + i) = rand()%100;
    }
}

void print(int *palex, int n)
{
    for (int i = 0; i < n; i++)
    {
        cout<<*(palex + i)<<", ";
    }    
}

int max(int *palex, int n)
{
    int max = *(palex + 0);
    for (int i = 0; i < n; i++)
    {
        if ((*(palex + i)) >= max)
        {
            max = (*(palex + i));
        }
        else
        {
            (*(palex + i)) = (*(palex + i));
        }
    }
    return max;
}

int min(int *palex, int n)
{
    
    int min = (*(palex + 0));
    for (int i = 0; i < n; i++)
    {
        if ((*(palex + i)) < min)
        {
            min = (*(palex + i));
        }
        else
        {
            (*(palex + i)) = (*(palex + i));
        }
    }
    return min;
}

float average(int *palex, int n)
{
    float average;
    int total = 0;
    for (int i = 0; i < n; i++)
    {
        total += *(palex + i);
    }
    average = (float)total/n;
    return average;
}