rust_learning/rectangles/src/main.rs

#[derive(Debug)]
struct Rectangle {
    width: u32,
    height: u32,
}

impl Rectangle {
    fn area(&self) -> u32 {
        self.width * self.height
    }

    fn add_height(&mut self) {
        self.height += 1;
    }

    fn can_hold(&self, other: &Rectangle) -> bool {
        self.width >= other.width && self.height >= other.height
    }

    fn square(size: u32) -> Rectangle {
        Rectangle {
            width: size,
            height: size,
        }
    }
}

fn main() {
    let mut rect1 = Rectangle {
        width: 30,
        height: 50,
    };
    let rect2 = Rectangle {
        width: 10,
        height: 40,
    };
    let rect3 = Rectangle {
        width: 60,
        height: 45,
    };
    let square1 = Rectangle::square(20);

    println!(
        "The area of the rectangle is {} square pixels.",
        rect1.area()
    );
    println!(
        "The area of the square is {} square pixels.",
        square1.area()
    );
    rect1.add_height();
    println!("{:#?}", rect1);
    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
}