draw-rectangle.rs

use std::io;
use std::io::Write;

fn main() {
    println!("This program draws a rectangle!");

    let mut length_input = String::new();
    print!("How long should the rectangle be: ");
    io::stdout().flush().unwrap();
    io::stdin()
        .read_line(&mut length_input)
        .expect("Failed to get user input!");

    let mut height_input = String::new();
    print!("How tall should the rectangle be: ");
    io::stdout().flush().unwrap();
    io::stdin()
    .read_line(&mut height_input)
    .expect("Failed to get user input!");

    let length: i32 = length_input
        .trim()
        .parse()
        .expect("Failed to convert length to a number!");
    let height: i32 = height_input
        .trim()
        .parse()
        .expect("Failed to convert height to a number!");


    for h in 1..=height {
        for l in 1..=length {
            print!("{}", get_rectangle_character_at_point(h, l, height, length));
        }
        print!("\n");
    }
}

fn get_rectangle_character_at_point(h: i32, l: i32, total_height: i32, total_length: i32) -> char {
    return if h == 1 {
        if l == 1 || l == total_length {
            '+'
        } else {
            '-'
        }
    } else if h == total_height {
        if l == 1 || l == total_length {
            '+'
        } else {
            '-'
        }
    } else if l == 1 || l == total_length {
        '|'
    } else {
        ' '
    }
}