010.golang 结构struct

package main

import (
    "fmt"
)

type person struct {
    Name string
    Age  int
}

func main() {
    a := person{}
    a.Age = 19
    a.Name = "xiaoMing"

    fmt.Println(a)

    b := person{
        Name: "daMing", //别忘了加逗号
        Age:  20,       //别忘了加逗号
    }

    fmt.Println(b)
    b.Age = 23
    fmt.Println(b)

    updateAge(b)
    fmt.Println(b, "new")

    //通过指针传递可以进行深度修改
    updateOrigenAge(&b)
    fmt.Println(b, "new")

    //或者,创建结构的时候，前面加上取地址符号，参数就变成了指向结构的指针
    c := &person{
        Name: "laoWang", //别忘了加逗号
        Age:  58,        //别忘了加逗号
    }
    fmt.Println(c)
    //修改指针指向的某个属性，可以直接操作，不需要再取地址
    c.Name = "xiaoWang"
    updateOrigenAge(c)
    fmt.Println(c, "new")
}

func updateAge(b person) {
    b.Age = 3
    fmt.Println(b, "updateAge")
}

func updateOrigenAge(b *person) {
    b.Age = 5
    fmt.Println(b, "updateOrigenAge")
}

package main

import (
    "fmt"
)

type person struct {
    Name string
    Age  int
    //匿名结构
    Contact struct {
        Phone, City string
    }
}

func main() {
    //匿名结构
    a := struct {
        Name string
        Age  int
    }{
        Name: "xiaoMing",
        Age:  18,
    }

    fmt.Println(a)

    fmt.Println("----------------------")

    b := person{
        Name: "xiaoWang",
    }
    b.Age = 19
    b.Contact.City = "beiJing"
    b.Contact.Phone = "894401224"

    fmt.Println(b)
}

package main

import (
    "fmt"
)

type person struct {
    string
    int
}

func main() {
    //匿名属性时，声明并初始化时要严格按照属性类型顺序进行赋值
    a := person{"xiaoMing", 12}
    fmt.Println(a)
}

package main

import (
    "fmt"
)

type person struct {
    Name string
    Age  int
}

func main() {
    //只有同一结构的变量才可以进行判断是否相等
    //同一结构，各个属性相等，即为相等
    a := person{"xiaoMing", 12}
    b := person{"xiaoMing", 13}
    fmt.Println(b == a)
    b.Age = 12
    fmt.Println(b == a)
}

package main

import (
    "fmt"
)

type human struct {
    Sex int
}

type teacher struct {
    //嵌入字段
    human
    Name string
    Age  int
}

type student struct {
    //嵌入字段
    human
    Name string
    Age  int
}

func main() {
    //嵌入字段赋值：human: human{Sex: 0}
    a := teacher{Name: "laoMing", Age: 48, human: human{Sex: 0}}
    b := student{Name: "xiaoMing", Age: 18, human: human{Sex: 1}}
    fmt.Println("a", a)
    fmt.Println("b", b)

    a.Name = "laoWang"
    a.Age = 50
    a.human.Sex = 1
    fmt.Println("a", a)
}

package main

import (
    "fmt"
)

type human struct {
    Sex  int
    Name string
}

type student struct {
    //嵌入字段
    human
    Name string
    Age  int
}

func main() {
    //嵌入字段属性与外层属性字段相同时
    a := student{Name: "laoMing", Age: 48, human: human{Sex: 0, Name: "lao.Ming"}}
    b := student{Age: 18, human: human{Sex: 1, Name: "xiao.Ming"}}
    c := student{Name: "xiao.Ming", Age: 18, human: human{Sex: 1}}
    //获取Name
    fmt.Println("a.Name=", a.Name, "|", "a.human.Name=", a.human.Name)
    fmt.Println("b.Name=", b.Name, "|", "b.human.Name=", b.human.Name)
    fmt.Println("c.Name=", c.Name, "|", "c.human.Name=", c.human.Name)
}