Smallest, Biggest, and Average of Array

#include <cstdlib>
#include <ctime>
#include <iostream>
using namespace std;

int findSmallestRemainingElement(int array[], int size);
int findBiggestRemainingElement(int array[], int size);
float findAverage(int array[], int size);

void sort(int array[], int size) {
    int smallestIndex = 0;
    int biggestIndex = 0;
    float average = 0;
    smallestIndex = findSmallestRemainingElement(array, size);
    biggestIndex = findBiggestRemainingElement(array, size);
    average = findAverage(array, size);
    cout << "Smallest: " << array[smallestIndex] << endl;
    cout << "Biggest: " << array[biggestIndex] << endl;
    cout << "Average: " << average << endl;
}

int findSmallestRemainingElement(int array[], int size) {
    int index_of_smallest_value = 0;
    for (int i = 0; i < size; i++) {
        if (array[i] < array[index_of_smallest_value]) {
            index_of_smallest_value = i;
        }
    }
    return index_of_smallest_value;
}

int findBiggestRemainingElement(int array[], int size) {
    int index_of_biggest_value = 0;
    for (int i = 0; i < size; i++) {
        if (array[i] > array[index_of_biggest_value]) {
            index_of_biggest_value = i;
        }
    }
    return index_of_biggest_value;
}

float findAverage(int array[], int size) {
    float sumArray = 0;
    for (int i = 0; i < size; i++) {
        sumArray += array[i];
    }
    return sumArray / size;
}

void displayArray(int array[], int size) {
    cout << "{";
    for (int i = 0; i < size; i++) {
        if (i != 0) {
            cout << ", ";
        }
        cout << array[i];
    }
    cout << "}";
}

int main() {
    int arraySize;
    cout << "Put The Size of The Array: ";
    cin >> arraySize;
    int *array = new int[arraySize];
    srand(time(NULL));
    for (int i = 0; i < arraySize; i++) {
        // keep the numbers small so they're easy to read
        array[i] = rand() % 100;
    }
    cout << "Original array: ";
    displayArray(array, arraySize);
    cout << '\n';
    sort(array, arraySize);

    return 0;
}