golang使用array表示固定大小的数组，使用slice表示动态数组。
package main
import "fmt"
func main() {
var a = [5]int{2,3,5,7,11}
fmt.Printf("type of array: %T\n", a)
fmt.Printf("address of array: %p\n", &a)
fmt.Printf("address of arrar[0]: %p\n", &a[0])
s := a[:]
fmt.Printf("slice = %v, len = %d, cap = %d\n", s, len(s), cap(s))
fmt.Printf("address of slice: %p\n", &s)
fmt.Printf("address of slice[0]: %p\n", &s[0])
s = append(s, 13)
fmt.Printf("slice = %v, len = %d, cap = %d\n", s, len(s), cap(s))
fmt.Printf("address of slice: %p\n", &s)
fmt.Printf("address of slice[0]: %p\n", &s[0])
}
输出如下:
type of array: [5]int
address of array: 0xc420014150
address of arrar[0]: 0xc420014150
slice = [2 3 5 7 11], len = 5, cap = 5
address of slice: 0xc42000a060
address of slice[0]: 0xc420014150
slice = [2 3 5 7 11 13], len = 6, cap = 10
address of slice: 0xc42000a060
address of slice[0]: 0xc42001c0f0
参考资料:
https://golang.org/pkg/builtin/#append
有疑问加站长微信联系（非本文作者）
