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Langton's ant: Difference between revisions

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Langton's ant (view source)

Revision as of 22:25, 11 October 2015

324 bytes added ,  8 years ago
→‎{{header|Rust}}: Updated to the Rust 1.3.0
(→‎{{header|Rust}}: Updated to the Rust 1.3.0)
Line 4,916:
 
=={{header|Rust}}==
<lang Rust>struct Ant {
x: usize,
struct Ant {▼
x y: uintusize,
dir: Direction▼
y: uint,
▲ dir: Direction
}
 
#[derive(Clone,Copy)]
impl Ant {
enum Direction {▼
fn move(&mut self, vec: &mut Vec<Vec<u8>>) {▼
North,▼
East,▼
South, ▼
West▼
}▼
 
use Direction::*;
let pointer = vec.get_mut(self.y).get_mut(self.x);▼
//change direction▼
match *pointer {▼
0 => self.dir = self.dir.right(),▼
1 => self.dir = self.dir.left(),
_ => fail!("Unexpected colour in grid")▼
}
//flip colour▼
//if it's 1 it's black▼
//if it's 0 it's white▼
*pointer ^= 1; ▼
 
▲structimpl Ant {
//move direction▼
▲ fn movemv(&mut self, vec: &mut Vec<Vec<u8>>) {
match self.dir {▼
▲ let pointer = &mut vec.get_mut([self.y).get_mut(][self.x)];
North => self.y -= 1,▼
▲ //change direction
South => self.y += 1,▼
▲ match *pointer {
East => self.x += 1,▼
West 0 => self.xdir -= 1self.dir.right(),
▲ 0 1 => self.dir = self.dir.rightleft(),
}
▲ _ => failpanic!("Unexpected colour in grid")
}
▲ //flip colour
▲ //if it's 1 it's black
▲ //if it's 0 it's white
▲ *pointer ^= 1;
 
▲ //move direction
}
▲ match self.dir {
▲}
▲ North => self.y -= 1,
▲ South => self.y += 1,
▲ East => self.x += 1,
West => self.x -= 1,
}
 
}
▲enum Direction {
▲ North,
▲ East,
▲ South,
▲ West
}
 
impl Direction {
fn right(self) -> Direction {
match self {
North => East,
East => South,
South => West,
West => North,
}
}
}
}
 
fn left(self) -> Direction {
//3 rights equal a left
self.right().right().right()
}
}
}
 
fn main(){
//create a 100x100 grid using vectors
let mut grid: Vec<Vec<u8>> = Vec::from_elem(vec![vec![0; 100,]; Vec::from_elem(100, 0u8))];
let mut ant = Ant {
x: 50, y: 50, dir: Direction::North
};
 
while ant.x < 100 && ant.y < 100 {
ant.movemv(&mut grid);
}
}
for each in grid.iter() {
//construct string
//using iterator methods to quickly convert the vector
//to a string
let string = each.iter()
.map(|&x| if x == 0 { " " } else { "#" })
.map(|&x| String::from_byte(x+32))
.fold(String::new(), |x, y| x+y);
.replace println!("!{}", "#"string);
}
println!("{}", string);
}</lang>▼
}
}
▲</lang>
 
=={{header|Scala}}==
Retrieved from "https://rosettacode.org/wiki/Special:MobileDiff/204599"