Posts by swolll

Here is my code:

#include <iostream>
#include <string>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
const double e = 2.71828;
double t, f, n, B, VoltageGain;

cout << "Please enter the time in hours the culture has been refrigerated:        ";
cin >> t;
cout << endl;

while (t < 0)
{
  cout << "t cannot be a negative value." << endl << endl;
  cout << "Please enter the time in hours the culture has been refrigerated:        ";
  cin >> t;
}
 	B = 300,000 * pow(e, -0.032 * t);
	
cout << fixed << showpoint;	
cout << "The number of bacteria in the culture after " << setprecision(6) << t << " hours of refrigeration is " << setprecision(6) << B << endl;

cout << "Please enter the amplifier's frequency in Hertz:        "; 
cin >> f;
cout << endl;

while (f < 0)
{
  cout << "f cannot be a negative value." << endl << endl;
  cout << "Please enter the amplifier's frequency in Hertz:        ";
  cin >> f;
}
	
cout << "Please enter the number of stages in the amplifier:        "; 
cin >> n;
cout << endl;

while (n < 0)
{
  cout << "n cannot be a negative value." << endl << endl;
  cout << "Please enter the number of stages in the amplifier:        ";
  cin >> n;
}
	VoltageGain = double pow ((275 / sqrt (pow (23, 2) + 0.5 * pow (f, 2))), n);

cout << fixed << showpoint;	
cout << "The voltage …