// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.



pub fn main() {
    let v: Vec<isize> = vec!(10, 20);
    assert_eq!(v[0], 10);
    assert_eq!(v[1], 20);
    let mut x: usize = 0;
    assert_eq!(v[x], 10);
    assert_eq!(v[x + 1], 20);
    x = x + 1;
    assert_eq!(v[x], 20);
    assert_eq!(v[x - 1], 10);
}