【golang笔记】go_指针(3)

var i int = 10
var ptr *int = &i

//i ---> 10   
//ptr ---> 地址 ---> 10

*ptr = 20

//i ---> 20   
//ptr ---> 地址 ---> 20

var str string = "aa"
var ptr *string = &str

fmt.Printf("str:%v %v\n", &str, str)            //str:0xc000096210 aa
fmt.Printf("ptr:%v %v %v\n", &ptr, ptr, *ptr)   //ptr:0xc0000ae018 0xc000096210 aa

*ptr = "bb"

fmt.Printf("str:%v %v\n", &str, str)            //str:0xc000096210 bb
fmt.Printf("ptr:%v %v %v\n", &ptr, ptr, *ptr)   //ptr:0xc0000ae018 0xc000096210 bb