結構體基本使用

package main

import "fmt"

func main() {
    //順序初始化，每個成員必須賦值
    var student = Student{"fan", 20, 'm'}
    fmt.Println("student = ", student)
    //指定成員初始化，沒有初始化的成員，自動賦值為0
    student1 := Student{name: "fan", age: 20}
    fmt.Println("student1 = ", student1)
    //通過new函式建立Student,  new函式返回一個指標
 

    student2 := new(Student)
    student2.name = "張三"
    student2.age = 20
    fmt.Println("student2  =  ", student2)
    (*student2).age = 30
    fmt.Println("student2  =  ", student2)

    //結構體比較
    var student3 = Student{"張三", 20, 'm'}
    var student4 = Student{"張三", 20, 'm'}
    fmt.Println("student3  ==  student4 :  
 
", student3 == student4)

    //結構體做函式引數：值傳遞
    var student5 = Student{"張三", 20, 'm'}
    valuePropagation(student5)
    fmt.Println("值傳遞：student = ", student5)
    reference(&student5)
    fmt.Println("引用傳遞：student = ", student5)

}

type Student struct {
    name string
    age  int
    sex  byte
 

}

//值傳遞
func valuePropagation(student Student) {
    student.name = "李四"
    //fmt.Println("值傳遞： student5 = ", student)
}

//引用傳遞
func reference(p *Student) {
    p.name = "李四"
}