fn start_main() -> i64 {
    print("first: ");
    let سيئ: result[f64] = parse_f64(read_line());
    if (سيئ::ok) {
        return 1;
    }
    print(سيئ::error::code);
    print("\nsecond: ");
    let جيد: result[f64] = parse_f64(read_line());
    if (جيد::ok) {
        if (format_f64(0.5) != "0.5") { return 2; }
        print(format_f64(جيد::value + 1.0));
        print("\n");
        return 0;
    }
    return 3;
}