rust-book/rectangles/src/main.rs

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2019-01-30 14:25:30 -05:00
#[derive(Debug)]
struct Rectangle {
width: u32,
height: u32,
}
// You could also have an individual impl block
// for each method
impl Rectangle {
fn area(&self) -> u32 {
self.width * self.height
}
fn can_hold(&self, other: &Rectangle) -> bool {
self.width > other.width && self.height > other.height
}
}
impl Rectangle {
// This is basically a static method
// But is called an associated function
fn square(size: u32) -> Rectangle {
Rectangle {
width: size,
height: size,
}
}
}
fn main() {
let rect1 = Rectangle { width: 30, height: 50 };
let rect2 = Rectangle { width: 10, height: 40 };
let rect3 = Rectangle { width: 60, height: 45 };
println!(
"The area of the rectangle is {} square pixels.",
rect1.area()
);
println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
println!("A square is a rectangle with equal sides: {:#?}", Rectangle::square(10));
}