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

use day43::tri_area;

fn read_f64(request: &str) -> Result<f64, ParseFloatError> {
    let mut input = String::new();
    print!("{}", request);
    io::stdout().flush().expect("Failed to flush stdout");
    std::io::stdin()
        .read_line(&mut input)
        .expect("Failed to read input");
    input.trim().parse()
}

fn main() {
    let base = read_f64("Enter the base of the triangle: ");
    let height = read_f64("Enter the height of the triangle: ");
    match base {
        Ok(base) => match height {
            Ok(height) => println!("The area of the triangle is: {}", tri_area(base, height)),
            Err(e) => println!("Error: {}", e),
        },
        Err(e) => println!("Error: {}", e),
    }
}