如何获得指针的地址？

Question

package main

import "fmt"

func main() {
   var a int= 20   
   var ip *int    

   ip = &a 

   fmt.Printf("a address: %x
", &a  )

   fmt.Printf(" the adrress that ip stored: %x
", ip )
   /*I try to get the address of variable ip */
   fmt.Printf(" the address of ip: %d
", &ip )

}

go run a.go

result:

a address: c420016078 the adrress that ip stored: c420016078 the address of ip: 842350510120

my question is : is 842350510120 correct address of ip?

Answer 1

If you print addresses in a consistent base (hexadecimal), you will see the expected result. In the current versions of the Go gc compiler, the variables i and pi are allocated on the heap.

For example,

package main

import "fmt"

func main() {
    var i int = 20
    var pi *int = &i
    fmt.Printf("%x the address of i
", &i)
    fmt.Printf("%x the address of pi
", &pi)
    fmt.Printf("%x the address that pi stored
", pi)
}

Output:

c00008e010 the address of i
c000090018 the address of pi
c00008e010 the address that pi stored