第 十二 课 指针

package main

import "fmt"

func main() {
    var aa = 9

    fmt.Println("address is: ", &aa)
}

package main

import "fmt"

func main() {
    var aa = 9
    fmt.Println("address is: ", &aa)
    
    var pointer *int = &aa
    fmt.Println(*pointer)
}

    var pointer2 *int
    fmt.Println(pointer2 == nil)     // true