学习Rust编程-原始指针

fn main(){
    let ptr=42 as *const Vec;
    unsafe{
        let new_addr=ptr.offset(4);
        println!("{:p} -> {:p}",ptr,new_addr);
    }
}

fn main() {
  let a: i64 = 42;
  let a_ptr = &a as *const i64;
  let a_addr: usize = unsafe { std::mem::transmute(a_ptr) };
  println!("a: {} ({:p}...0x{:x})", a, a_ptr, a_addr + 7);
}