Calculate average using array

#include <iostream>
using namespace std;
int main() {
    int n, i;
    float num[100], sum = 0.0, avg;

    cout<<"Enter the numbers of elements: ";
    cin >> n ;

    while (n > 100 || n < 1) {
        cout<<"Error! number should in range of (1 to 100).\n"<<endl;
        cout<<"Enter the number again: ";
        cin >> n;
    }

    for (i = 0; i < n; ++i) {
        cout<<"Enter number: "<< i + 1 <<endl;
        cin >> num[i] ;
        sum += num[i];
    }

    avg = sum / n;
    cout<<"Average = " <<avg <<endl;
    return 0;
}