C++ Conversion Between Celsius And Fahrenheit Degrees

Simple C++ program to convert Celsius degrees to Fahrenheit degrees and Fahrenheit degrees to Celsius degrees.

// ? 2017 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net

#include <iostream>

using namespace std;

double CelsiusToFahrenheit(double n);
double FahrenheitToCelsius(double n);

int main(){
  char choice;
  double temperature;
  
  cout << "C - convert Celsius to Fahrenheit, F - convert Fahrenheit to Celsius" << endl;
  cin >> choice;
  
  cout << "Enter temperature value: ";
  cin >> temperature;
  
  if(tolower(choice) == 'c'){
    cout << temperature << " degrees Celsius is equal to " << CelsiusToFahrenheit(temperature) << " degrees Fahrenheit" << endl;
  }else{
    cout << temperature << " degrees Fahrenheit is equal to " << FahrenheitToCelsius(temperature) << " degrees Celsius" << endl;
  }
}

double CelsiusToFahrenheit(double n){
  return (n * 1.8 + 32);
}

double FahrenheitToCelsius(double n){
  return ((n - 32) / 1.8);
}