Structs

// Structs: definición, campos, impl con métodos, instanciación

struct Point {
    x: int,
    y: int
}

impl Point {
    fn distance_from_origin(self) -> int {
        // distancia Manhattan: |x| + |y|
        var ax: int = self.x
        if ax < 0 {
            ax = ax * -1
        }
        var ay: int = self.y
        if ay < 0 {
            ay = ay * -1
        }
        return ax + ay
    }

    fn to_string(self) -> String {
        return "(" + int_to_string(self.x) + ", " + int_to_string(self.y) + ")"
    }
}

struct Rectangle {
    width: int,
    height: int
}

impl Rectangle {
    fn area(self) -> int {
        return self.width * self.height
    }
}

fn main() -> int {
    let p1: Point = Point { x: 3, y: 4 }
    print("Punto: " + p1.to_string())
    print("Distancia al origen: " + int_to_string(p1.distance_from_origin()))

    let p2: Point = Point { x: -2, y: 5 }
    print("Punto: " + p2.to_string())
    print("Distancia al origen: " + int_to_string(p2.distance_from_origin()))

    let rect: Rectangle = Rectangle { width: 6, height: 7 }
    print("Area del rectangulo: " + int_to_string(rect.area()))

    return 0
}

Punto: (3, 4)
Distancia al origen: 7
Punto: (-2, 5)
Distancia al origen: 7
Area del rectangulo: 42