使用结构体的3中方式

package main

import (
    "fmt"
    "strings"
)

type Person struct {
    firstName string
    lastName string
}
func upPerson(p *Person) {
    p.firstName = strings.ToUpper(p.firstName)
    p.lastName = strings.ToUpper(p.lastName)
}
//使用结构体的3中方式
func main() {
    // 1-struct as a value type:
    var pers1 Person
    pers1.firstName = "Chris"
    pers1.lastName = "Woodward"
    upPerson(&pers1)
    fmt.Printf("The name of the person is %s %s\n", pers1.firstName, pers1.lastName)
    // 2—struct as a pointer:
    pers2 := new(Person)
    pers2.firstName = "Chris"
    pers2.lastName = "Woodward"
    (*pers2).lastName = "Woodward" // 这是合法的
    upPerson(pers2)
    fmt.Printf("The name of the person is %s %s\n", pers2.firstName, pers2.lastName)
    // 3—struct as a literal:
    pers3 := &Person{"Chris","Woodward"}
    upPerson(pers3)
    fmt.Printf("The name of the person is %s %s\n", pers3.firstName, pers3.lastName)
}