Fahrenheit to celsius

f_to_c.rs

// Fahrenheit to Celsius
// (F - 32) * (5/9) = C

use std::io;

fn main() {

    let mut input = String::new();
    io::stdin().read_line(&mut input).unwrap();

    let trimmed = input.trim();
    let trimmed = match trimmed.parse::<f32>() {
        Ok(i) => i,
        Err(..) => panic!("Not a number"),
    };
    let trimmed = fahrenheit_to_celsius(trimmed);
    println!{"{}", trimmed.to_string()};
}


fn fahrenheit_to_celsius(f: f32) -> f32 {
    (f - 32.0_f32) * (5.0_f32/9.0_f32)
}