use std::error;
use std::sync::Arc;

fn main() {
	let mut i:isize = 0;
	let mut d:f64 = 0;
	match (|| -> Result<(), Arc<dyn error::Error>>{
		i = stoi(args[1])?;
		return Ok(());
	})() {
		Ok(()) => {},
		Err(ex) => {
			{
				println!("Can't convert to integer!");
				exit(1);
			}
		}
	};
	match (|| -> Result<(), Arc<dyn error::Error>>{
		d = stod(args[2])?;
		return Ok(());
	})() {
		Ok(()) => {},
		Err(ex) => {
			{
				println!("Can't convert to floating point!");
				exit(1);
			}
		}
	};
	println!("{}", format!("i + d = {0:f}", (i) as f64 + d));
}