4-24 characters; A-Z, 0-9 or underscores only
6-12 Characters
#include <iostream> double fahrenToCelsius(double temp){ return (temp - 32)*5/9; } int main () { double fah = 0; std::cin >> fah; std::cout << "Is: " << fahrenToCelsius(fah) << " Celsius"; return 0; }