// prompts for windspeed(m/hour) and temperature (F) and computes the wind 
// chill calculator as follows
// windchill = 0.0817 (3.71 sqrt(windspeed) + 5.81 -.25) *
//	       (temp - 91.4) + 91.4
//
// Sean McCulloch
// 10/27/98


#include <iostream>
#include <cmath>
using namespace std;


double windchill(double, double); // computes the wind-chill factor

int main() {

  // declaring and entering the temperature and wind speed
  double temp, windspeed;
  cout << "Enter the temperature (in farenheit): ";
  cin >> temp;
  cout << "enter the wind speed (in miles per hour): ";
  cin >> windspeed;

  cout << "The wind chill value is: " << 
       windchill(temp, windspeed) << endl;

}


// computes the wind-chill factor on the basis of
// temp - temperature and
// ws - wind speed
double windchill(double temp, double ws){
        double result = 0.0817 *
                       (3.71*sqrt(ws)+5.81-.25*sqrt(ws)) *
                       (temp-91.4)
	               +91.4;
	return(result);
}