/* hello.go */

package main

import (

	"fmt"

	"unsafe"

)

const SERVER_IP string = "127.0.0.1"

const SERVER_PORT int = 9527

const SERVER_HOST = "jalen.site"

const IP, PORT = "192.168.0.1", 3306

const (

	Unknown = 0

	Female  = 1

	Male    = 2

)

const (

	name              = "Jalen"

	age               = 12

	phoneNumber       = "18888888888" //11

	phoneNumberLength = len(phoneNumber)

	// 字符串类型在 go 里对应一个结构体，该结构体有两个域，第一个域是指向该字符串的指针，

	// 第二个域是字符串的长度，每个域占 8 个字节，但是并不包含指针指向的字符串的内容

	nameSize = unsafe.Sizeof(name) // 输出 16

)

const (

	num1 = iota //0

	num2 = iota //1

	num3 = iota //2

)

const (

	num4 = iota //0

	num5        //1

	num6        //2

	num7 = iota //3

)

const (

	num8  = iota   //0

	num9  = 20     //20

	num10 = 90     //90

	num11          //90

	num12          //90

	num13 = iota   //5

	num14 = "haha" //haha

	num15          //haha

	num16 = iota   //8

)

const (

	i = 1 << iota //1 左移 0 位，不变，=1

	j = 3 << iota //3 左移 1 位，*2^1，=6

	k             //3 左移 2 位，*2^2, =12

	l             //3 左移 3 位，*2^3, =24

)

const (

	m = 1 //1

	n     //1

	o     //1

	p     //1

)

func main() {

	fmt.Println("测试常量赋值")

}