Console Input

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ConsoleInput1.rs

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

mod utils;

fn main() {
	let mut name:&str = "";
	name = &(Utils.prompt("What is your name? "));
	let mut favoriteColor:&str = "";
	favoriteColor = &(Utils.prompt("What is your favorite color? "));
	println!("{}", format!("Hello, {0:s}!  I like {1:s} too!", name, favoriteColor));
}

ConsoleInput2.rs

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

mod utils;
use std::error;
use std::sync::Arc;

fn main() {
	match (|| -> Result<(), Arc<dyn error::Error>>{
		let mut favoriteInt:isize = 0;
		let mut favoriteLong:i64 = 0;
		let mut favoriteDouble:f64 = 0.0;
		let mut favoriteIntInput:&str = "";
		favoriteIntInput = &(Utils.prompt("What is your favorite small integer? "));
		favoriteInt = stoi(favoriteIntInput)?;
		let mut favoriteLongInput:&str = "";
		favoriteLongInput = &(Utils.prompt("What is your favorite large integer? "));
		favoriteLong = stol(favoriteLongInput)?;
		let mut favoriteDoubleInput:&str = "";
		favoriteDoubleInput = &(Utils.prompt("What is your favorite floating point? "));
		favoriteDouble = stod(favoriteDoubleInput)?;
		let sum:f64 = (favoriteInt) as f64 + (favoriteLong) as f64 + favoriteDouble;
		println!("{}", format!("All together they add up to {0:f}!", sum));
		return Ok(());
	})() {
		Ok(()) => {},
		Err(ex) => {
			if let Some(ex) = utils::isCustomErrorType(ex.clone(), utils::CustomError::NumberFormatError("".to_string())){
				println!("{}", String::from("Bad input! ") + &format!("{}", ex));
			} else {
				println!("Don't know what went wrong!");
			}
		}
	};
}

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References

• [[Rust Language Reference]]
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