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package main
import "fmt"
// 闭包:函数 + 函数内不能访问到变量 [能够读取其他函数内部变量的函数]
// 闭包目的: 间接访问一个变量
func ins() func() int {
i := 0
return func() int {
i++
return i
}
}
func main() {
nextInt := ins()
fmt.Println(nextInt())
fmt.Println(nextInt())
fmt.Println(nextInt())
// 特定的函数变量是唯一的
nextInts := ins()
fmt.Println(nextInts())
}