在golang中，＆和*有什么区别？

这是一个非常简单的示例，说明了&和*的用法。请注意，*它可用于两种不同的情况1）将变量声明为指针2）取消引用指针。

package main

import "fmt"

func main() {
    b := 6 

    var b_ptr *int // *int is used delcare variable
                   // b_ptr to be a pointer to an int

    b_ptr = &b     // b_ptr is assigned value that is the address
                       // of where variable b is stored

    // Shorhand for the above two lines is:
    // b_ptr := &b

    fmt.Printf("address of b_ptr: %p\n", b_ptr)

    // We can use *b_ptr get the value that is stored
    // at address b_ptr, or dereference the pointer 
    fmt.Printf("value stored at b_ptr: %d\n", *b_ptr)

}

结果：

address of b_ptr: 0xc82007c1f0
value stored at b_ptr: 6