Simple RPN calculator in Rust

rpn_calc.rs

use std::io;

fn main() {
    let mut v: Vec<f64> = Vec::new();

    loop {
        let mut input = String::new();

        io::stdin().read_line(&mut input)
        .expect("Failed to read line");

        match input.trim() {
            "+" => {
                let (y,x) = (v.pop().unwrap(),v.pop().unwrap());
                v.push(x+y);
                println!("{}", x+y);
            },
            "-" => {
                let (y,x) = (v.pop().unwrap(),v.pop().unwrap());
                v.push(x*y);
                println!("{}", x*y);
            },
            "*" => {
                let (y,x) = (v.pop().unwrap(),v.pop().unwrap());
                v.push(x*y);
                println!("{}", x*y);
            },
            "/" => {
                let (y,x) = (v.pop().unwrap(),v.pop().unwrap());
                v.push(x/y);
                println!("{}", x/y);
            },
            "^" => {
                let (y,x) = (v.pop().unwrap(),v.pop().unwrap());
                v.push(x.powf(y));
                println!("{}", x.powf(y));
            },
            &_ => {
                v.push(input.trim().parse().unwrap());
            },
        }
    }
}