Armstrong's numbers in C++

#include <iostream>
using namespace std;
int power(int x, int i) {
    if (i == 0) return 1;
    int xx = 1;
    for (int j = 0; j < i; j++) {
        xx = xx * x;
    }
    return xx;
}
int main()
{
    int a = 0, b = 0;
    cout << "Armstrong's numbers in ";
    cout << "Range: ["; cin >> a; cout << ";"; cin >> b; cout << "]" << endl;
    cout << "Armstong's numbers in this range:" << endl;
    for (int i = a; i <= b; i++) {
        int container = 0;
        int ii = i;
        while (ii > 0) {
            container += power(ii % 10, 3);
            ii = ii / 10;
        }
        if (i == container) {
            cout << i << endl;
        }
    }
}