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51 lines
930 B
51 lines
930 B
package main
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import "fmt"
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type person struct {
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city, name string
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age int
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}
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func main() {
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//基本实例化
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var p1 person //没有初始化的结构体，其成员变量都是对应其类型的零值。
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p1.age = 10
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p1.city = "anhui"
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p1.name = "ld"
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//匿名结构体
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var user struct {
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name string
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age int
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}
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user.age = 10
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user.name = "username"
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fmt.Println(p1, user)
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//创建指针类型结构体
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var p2 = new(person)
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fmt.Printf("p2: %T\n", p2)
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fmt.Printf("p2: %#v\n", p2)
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//取结构体地址的实例化
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p3 := &person{}
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fmt.Printf("p3: %T\n", p3)
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fmt.Printf("p3: %#v\n", p3)
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p3.age = 18 //本质在底层是执行的 (*p3).age = 18
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p3.city = "beijing"
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p3.name = "zhang san"
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fmt.Printf("p3: %#v\n", p3)
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p4 := newPerson("p4", "suzhou", 22)
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fmt.Printf("p4: %#v\n", p4)
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}
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func newPerson(name, city string, age int) *person {
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return &person{
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city: city,
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name: name,
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age: age,
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}
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}
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