数组元素的地址

Question

How do I get the address of an array element in Go?

Answer 1

Use the address operator & to take the address of an array element. Here's an example:

package main

import "fmt"

func main() {
    a := [5]int{1, 2, 3, 4, 5}
    p := &a[3]     // p is the address of the fourth element

    fmt.Println(*p)// prints 4
    fmt.Println(a) // prints [1 2 3 4 5]
    *p = 44        // use pointer to modify array element
    fmt.Println(a) // prints [1 2 3 44 5]

}

Note that the pointer can be used to access the one element only. It's not possible to add or subtract from the pointer to access other elements.