Question

2. 32 LAB: Musical note frequencies 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

Answer 1

int main() {

double f0;

const double r = pow(2, 1.0/12);

cout << "Enter start frequency: ";

cin >> f0;

cout << fixed << setprecision(2);

for(int n=0; n<5; n++) {

cout << f0*pow(r, n) << " ";

}

return 0;

}

Step-by-step explanation:

In the description, some to-the-power notations were dropped, see code on how to resolve.