I'm trying to write a C++ funtion for the following assignment, having some trouble... help?

For this assignment you will create a program converting Fahrenheit temperatures to Celsius temperatures. The formula for converting a temperature from Celsius to Fahrenheit is: F = C x 1.8 + 32, where F is the Fahrenheit temperature and C is the Celsius temperature. Write a function named Fahrenheit that accepts a Celsius temperature as an argument and returns the temperature converted to Fahrenheit. Demonstrate the function by accepting a Celsius temperature from a user and displaying the temperature converted to Fahrenheit. Be sure to include comments throughout your code where appropriate