关于go里面cap的结果的疑问

``` import "fmt" func main() { var a []int printSlice("a", a) // append works on nil slices. a = append(a, 0) printSlice("a", a) // the slice grows as needed. a = append(a, 1) printSlice("a", a) // we can add more than one element at a time. a = append(a, 2, 3, 4) printSlice("a", a) } func printSlice(s string, x [...阅读全文