Centimeter To Meter Converter Using Rust

A simple program that I wrote that will ask the user to give length in centimeter and then it will convert into Meter equivalent using Rust as my programming language.

Add me at Facebook my address is jakerpomperada@gmail.com and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

Sample Program Output

Program Listing

meter.rs

// Centimer To Meter Program in Rust Programming language.

// Written By: Mr. Jake R. Pomperada, MAED-IT

// July 17, 2016

use std::io::{self, Write};

use std::fmt::Display;

use std::process;

fn main() {

       println!("\n");

       println!("\tCentimeter To Meter Program in Rust");

       println!("\n");

    let cm: f32 = grab_input("Give length in centimeter ")

        .unwrap_or_else(|e| exit_err(&e, e.raw_os_error().unwrap_or(-1)))

        .trim()

        .parse()

        .unwrap_or_else(|e| exit_err(&e, 2));

     let  solve_meter = cm / 100.0;

                 

    println!("\n"); 

    println!("The length in centimeter is {:.2} its equivalent in meters is {:.2}.",cm,solve_meter);

    println!("\n");  

    println!("End of Program");

}

fn grab_input(msg: &str) -> io::Result<String> {

    let mut buf = String::new();

    print!("{}: ", msg);

    try!(io::stdout().flush());

    try!(io::stdin().read_line(&mut buf));

    Ok(buf)

}

fn exit_err<T: Display>(msg: T, code: i32) -> ! {

    let _ = writeln!(&mut io::stderr(), "Error: {}", msg);

    process::exit(code)

}