Rust provides a special kind of struct known as a tuple struct. Unlike a regular struct with named fields, a tuple struct groups fields together without names, making it useful for lightweight structures where naming each field isn't necessary.

A tuple struct looks like this:

struct Point(i32, i32, i32);

You can create an instance of a tuple struct just like you would with a tuple and access its fields using dot notation.

Your task is to define a tuple struct called Rectangle with two fields:

• The width of the rectangle as a f32.
• The height of the rectangle as a f32.

Then, implement a function area that calculates and returns the area of the rectangle by multiplying its width and height.

• The fields of the tuple struct must be public. Here's an example:

  pub struct Point(pub i32, pub i32, pub i32);

Here's how your code will be tested:

let rect = Rectangle(4.0, 5.0);
assert_eq!(area(&rect), 20.0);
 
let square = Rectangle(10.0, 10.0);
assert_eq!(area(&square), 100.0);

If you get stuck, consider these hints: