Counting sort c++

// program to implement counting sort algorithm in c++
#include <iostream>

using namespace std;

void displayList(int elementList[], int length){
    for(int index = 0; index < length; index++){
        cout<<elementList[index]<<" ";
    }
    cout<<endl;
}

int* countingSort(int myList[], int length, int minElement, int maxElement){

    // finding the length, min, max of the recieved list of numbers
    int element;
    // creating a count list with initial values as zeros
    int countList[maxElement - minElement + 1];
    for (int index = 0; index < (maxElement - minElement + 1); index++){
        countList[index] = 0;
    }

    // counting number of times each element occurs in the list and storing the count in the coutList
    for(int index = 0; index < length; index++) {
        element = myList[index];
        countList[element - minElement] = countList[element - minElement] + 1;
    }

    // starting from the min element upto max element
    // we insert values according to their count in the new list in sorted order
    element = minElement;
    int index2 = 0;
    for (int index = 0; index < (maxElement - minElement + 1); index++){
        int Count = countList[index];
        for(int j = 0; j < Count; j++) {
            myList[index2] = element;
            index2++;
        }
        element += 1;
    }

    return myList;

}

int main(){

    int *sortedList;
    cout<<"Program to implement counting sort algorithm in C++"<<endl;
    int length, element;
    cout<<"Enter the number of Elements to be sorted : ";
    cin>>length;
    int myList[length];
    cout<<"Enter the elements to be sorted : ";
    for(int index = 0; index < length; index++){
        cin>>element;
        myList[index] = element;
    }

    int minElement = myList[0], maxElement = myList[0];
    for(int index = 0; index < length; index++){
        if(minElement > myList[index]){
            minElement = myList[index];
        }
        if(maxElement < myList[index]){
            maxElement = myList[index];
        }
    }

    cout<<"\nThe list of elements before sorting is : "<<endl;
    displayList(myList, length);

    sortedList = countingSort(myList, length, minElement, maxElement);

    cout<<"\nThe sorted list is : "<<endl;
    displayList(sortedList, length);
}