Даны три точки A, B, C на числовой оси. Найти длины отрезков AC и BC и их сумму

use std::io;
 
fn ask(prompt : &str) -> f64 {
    print!("Input {} : ",prompt);
    let mut input_text = String::new();
    io::stdin()
        .read_line(&mut input_text)
        .expect("failed to read from stdin");
 
    let trimmed = input_text.trim();
    match trimmed.parse() {
        Ok(r) => { println!(); r},
        Err(..) => {
            println!("this was not a number: {}", trimmed);
            ask(prompt)
            },
    }
}
 
fn main() {
    let a = ask("A coordinate");
    let b = ask("B coordinate");
    let c = ask("C coordinate");
    let ac = (a-c).abs();
    let bc = (b-c).abs();
    println!("The length of the |AB| segment = {:.2}",ac);
    println!("The length of the |BC| segment = {:.2}",bc);
    println!("The sum of lengths of |AB| and |BC| segments = {:.2}",ac+bc);
}

use std::io;
 
fn ask(prompt : &str) -> f64 {
    let mut input_text = String::new();
    loop {
        print!("Input {} : ",prompt);
        io::stdin()
            .read_line(&mut input_text)
            .expect("failed to read from stdin");
        {
            let trimmed = input_text.trim();
            if let Ok(r) = trimmed.parse() {
                println!(); 
                return r;
            }
            println!("this was not an number: {}", trimmed);
        }    
        input_text.clear();
    }
}
 
fn main() {
    let a = ask("A coordinate");
    let b = ask("B coordinate");
    let c = ask("C coordinate");
    let ac = (a-c).abs();
    let bc = (b-c).abs();
    println!("The length of the |AB| segment = {:.2}",ac);
    println!("The length of the |BC| segment = {:.2}",bc);
    println!("The sum of lengths of |AB| and |BC| segments = {:.2}",ac+bc);
}