TicketV1/Structs/Task/src/main.rs

// Define a struct named `Order` with the following fields:
// - `price`, an unsigned integer
// - `quantity`, an unsigned integer
//
// It should also have a method named `is_available` that returns a `true` if the quantity is
// greater than 0, otherwise `false`.

struct Order {
    price: u32,
    quantity: u32,
}

impl Order {
    fn is_available(&self) -> bool {
        self.quantity > 0
    }
}

fn main() {
    let order = Order {
        price: 100,
        quantity: 10,
    };
    assert!(order.is_available());

    let order = Order {
        price: 100,
        quantity: 0,
    };
    assert!(!order.is_available());
}