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Structure pointer is the same as ordinary variable pointer , Let me first review the pointers to ordinary variables , for example ：

package main

import "fmt"

func main() {
    var name string
    name = "tom"
    // p_name  Pointer types 
    var p_name *string
    // &name  take name Address 
    p_name = &name
    fmt.Printf("name: %v\n", name)
    //  Output pointer address 
    fmt.Printf("p_name: %v\n", p_name)
    //  Output the content value pointed to by the pointer 
    fmt.Printf("*p_name: %v\n", *p_name)
}

Running results

[Running] go run "d:\SynologyDrive\ software development \go\golang Introduction to project practice \goproject\360duote.com\pro01\test.go"
name: tom
p_name: 0xc000050230
*p_name: tom

go Structure pointer

example

package main

import "fmt"

func main() {
    type Person struct {
        id   int
        name string
    }

    var tom = Person{1, "tom"}

    var p_person *Person
    p_person = &tom
    fmt.Printf("tom: %v\n", tom)
    fmt.Printf("p_person: %p\n", p_person)
    fmt.Printf("*p_person: %v\n", *p_person)
}

Running results

[Running] go run "d:\SynologyDrive\ software development \go\golang Introduction to project practice \goproject\360duote.com\pro01\test.go"
tom: {1 tom}
p_person: 0xc000004078
*p_person: {1 tom}

Use new Keyword to create a structure pointer

We can also use new Key to instantiate the structure , What we get is the address of the structure , for example ：

package main

import "fmt"

func main() {
    type Person struct {
        id   int
        name string
    }

    var p_person = new(Person)
    fmt.Printf("p_person: %T\n", p_person)
}

Running results

[Running] go run "d:\SynologyDrive\ software development \go\golang Introduction to project practice \goproject\360duote.com\pro01\test.go"
p_person: *main.Person

From run results , We found that p_person Is pointer type

Access structure pointer members

Access structure pointer members , Point operators are also used （.）, for example ：

package main

import "fmt"

func main() {
    type Person struct {
        id   int
        name string
    }

    var p_person = new(Person)
    fmt.Printf("p_person: %T\n", p_person)

    p_person.id = 1
    p_person.name = "tom"
    fmt.Printf("*p_person: %v\n", *p_person)
}

Running results

[Running] go run "d:\SynologyDrive\ software development \go\golang Introduction to project practice \goproject\360duote.com\pro01\test.go"
p_person: *main.Person
*p_person: {1 tom}