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

int main () {

 double fah;

 cout << "What is the degrees in farenheit: ";
 cin >> fah;

 if (!(cin >> fah)) {
	 cerr << "Sorry, that wasn't a vaild whole number." << endl;
	 return EXIT_FAILURE;
}

 if (fah < 1) {
     cerr << "Nah man, that's not gonna work put in a number.  atleast more then 1." << endl;
     return EXIT_FAILURE;
 }
    
     double cel {(fah - 32) * 5/9}; 

 cout << " your temperature in celsius is: " << cel << endl;
 return 0;


}