#include #include using namespace std; int main() { double fahrenheit {0}; cout << "What temperature is it in Fahrenheit (input the number only)?\n"; cin >> fahrenheit; if (!cin) { cerr << "Sorry, that wasn't a valid whole number.\n"; return EXIT_FAILURE; //fahrenheit dies here; celsius not born yet. } double celsius {(fahrenheit - 32) * (5.0/9.0)}; cout << "That is " << celsius << " degrees Celsius.\n"; return EXIT_SUCCESS; //fahrenheit and celsius die here. }