go语言渐入佳境[15]-struct声明与定义

//声明Teacher结构体type Teacher struct {	name string	age  int8	sex  byte}

var t1 Teacher t1.name = "jonson" t1.age = 35 t1.sex = 1

t2 := Teacher{}t2.name = "olaya"t2.age = 30t2.sex = 1

t3 := Teacher{  name: "Josh",  age:  28,  sex:  1,}t3 = Teacher{name: "Josh3", age: 27, sex: 1}

t4 := Teacher{"Ruby", 30, 0}

t5 := new(Teacher)(*t5).name = "Running"(*t5).age = 31(*t5).sex = 0t5.name = "Running2"t5.age = 31t5.sex = 0

addr := struct {  province, city string}{"陕西省", "西安市"}

package mainimport "fmt"//定义Teacher结构体type Teacher struct {	name string	age  int8	sex  byte}func main() {//1、var声明方式实例化结构体，初始化方式为：对象.属性=值var t1 Teacher	fmt.Println(t1)	fmt.Printf("t1:%T , %v , %q \n", t1, t1, t1)//if t1 == nil {//	fmt.Println()//}	t1.name = "Steven"	t1.age = 35	t1.sex = 1	fmt.Println(t1)	fmt.Println("-------------------")//2、变量简短声明格式实例化结构体，初始化方式为：对象.属性=值	t2 := Teacher{}	t2.name = "David"	t2.age = 30	t2.sex = 1	fmt.Println(t2)	fmt.Println("-------------------")//3、变量简短声明格式实例化结构体，声明时初始化。初始化方式为：属性:值 。属性:值可以同行，也可以换行。（类似map的用法）	t3 := Teacher{		name: "Josh",		age:  28,		sex:  1,	}	t3 = Teacher{name: "Josh3", age: 27, sex: 1}	fmt.Println(t3)	fmt.Println("-------------------")//4、变量简短声明格式实例化结构体，声明时初始化，不写属性名，按属性顺序只写属性值	t4 := Teacher{"Ruby", 30, 0}	fmt.Println(t4)	fmt.Println("-------------------")//5、创建指针类型的结构体	t5 := new(Teacher)	fmt.Printf("t5:%T , %v , %p \n", t5, t5, t5)//(*t5).name = "Running"//(*t5).age = 31//(*t5).sex = 0//语法简写形式——语法糖	t5.name = "Running2"	t5.age = 31	t5.sex = 0	fmt.Println(t5)	fmt.Println("-------------------")}

package mainimport "fmt"type User struct {//name string//sex byte//age int8//height float64//weight float64stringbyteint8float64}func main() {//	实例化结构体	user:= User{"jonson" , 'm' , 35 , 177.5}	fmt.Println(user)//如果想依次输出姓名、年龄、身高、性别	fmt.Printf("姓名：%s \n" , user.string)	fmt.Printf("身高：%.2f \n" , user.float64)	fmt.Printf("性别：%c \n" , user.byte)	fmt.Printf("年龄：%d \n" , user.int8)}