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:
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:
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