#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
	float f, c;
	cout << fixed << showpoint << setprecision(1);

	cout << "Input the temprature in F -(-100 to quit) ";
	cin >> f;

	while (f > -100)
	{

		c = 5.0/9*(f-32);

		cout << "The temperature in F - " << f << " is equal to " << c << 
		" Centergrade." << endl;

		cout << "Input the temprature in F -(-100 to quit) ";
        	cin >> f;
	}
	return 0;
}