Clear bits in a given number within a range

#include <bits/stdc++.h>
using namespace std;                                    
int rangeClear(int n, int i, int j)
{
    int mask1 = (~0) << (j + 1);
    int mask2 = pow(2, i) - 1;
    return (n & (mask1 | mask2));
}
int main()
{
    int a;
    int r1, r2;
    cin >> a >> r1 >> r2;
    cout << " after clearing bits from " << r1 << " to "
         << r2 << " in number " << a << " we get " << rangeClear(a, r1, r2);

    return 0;
}