2.33. Go language pointer array

Before we look at the pointer array, let’s take a look at an example that defines an integer array of length 3:

2.33.1. Example #

package main import "fmt" const MAX int = 3 func main() { a := []int{10,100,200} var i int for i = 0; i < MAX; i++ { fmt.Printf("a[%d] = %d\\n", i, a[i] ) } } 

The output of the above code execution is as follows:

a[0] = 10 a[1] = 100 a[2] = 200 

In one case, we may need to save the array so that we need to use the pointer.

The following declares an array of integer pointers:

var ptr [MAX]*int; 

ptr is an array of integer pointers. So each element points to a value. Three integers for the following examples are stored in an array of pointers:

2.33.2. Example #

package main import "fmt" const MAX int = 3 func main() { a := []int{10,100,200} var i int var ptr [MAX]*int; for i = 0; i < MAX; i++ { ptr[i] = &a[i] /* Assigning an integer address to a pointer array */ } for i = 0; i < MAX; i++ { fmt.Printf("a[%d] = %d\\n", i,*ptr[i] ) } } 

The output of the above code execution is as follows:

a[0] = 10 a[1] = 100 a[2] = 200 