Average calculation of a certain number by input data (array).cpp

#include <iostream>
using namespace std;
int main(){
    int size;
    cout << "Enter the size of array: ";
    cin >> size;
    cout << "-------------------------\n";

    int array[size];
    float sum = 0;
    string conc_array = "[";
    
    for (int i = 0; i < size; i++){
        cout << "Enter the value of number-" << (i+1) << ": ";
        cin >> array[i];
        sum += array[i];
        
        // Use the below lines to concatenate the full array as a string
        conc_array = conc_array.append(to_string(array[i]));
        conc_array = (i != size - 1) ? conc_array.append(", ") : conc_array.append("]");
    }
    sum = sum/size;
    cout << "\nYour array is: " << conc_array << endl;
    cout << "Average of numbers = " << sum;
}