On a piano, a key has a frequency, say f0. Each higher key (black or white) has a frequency of f0 * rn, where n is the distance (number of keys) from that key, and r is 2(1/12). Given an initial key frequency, output that frequency and the next 4 higher key frequencies.

Output each floating-point value with two digits after the decimal point, which can be achieved by executing
cout << fixed << setprecision(2); once before all other cout statements.

Ex: If the input is:

440.0
(which is the A key near the middle of a piano keyboard), the output is:

440.00 466.16 493.88 523.25 554.37
#include
#include
#include
using namespace std;

int main()
{
double fn, f0, r;
int n=4;// n being 1, 2, 3, and finally 4.
r =pow(2.0,(1.0 / 12.0));
cout << fixed < cin >> f0;
cout << f0 <<" ";
for (int i = 1; i <= n; i++)
{
//calculate
fn = f0 *pow(r , i);
cout << fn <<" ";
}
cout <
return 0;
}