fetch reference by offset

fetch_by_offset.rs

struct Foo {
    x: u32,
    y: f64,
}

fn main() {
    let foo = Foo {
        x: 1,
        y: 1.024,
    };

    let offset_x = &(foo.x) as *const u32 as usize - (&foo as *const Foo as usize);
    let offset_y = &(foo.y) as *const f64 as usize - (&foo as *const Foo as usize);
    unsafe {
        println!("jj");
        let x_by_offset = &*((&foo as *const Foo as usize + offset_x) as *const u32);
        let y_by_offset = &*((&foo as *const Foo as usize + offset_y) as *const f64);
        println!("dandan");
        println!("x: {},y: {}", x_by_offset, y_by_offset);
    }
}