go: fmt.Printf(%T | %v | %+v | %#v)

package main

import "fmt"

type Person struct {
  Name string
  Age  int
}

func main() {
  p := Person{Name: "frank", Age: 35}
  //打印类型
  fmt.Printf("%T\n", p)
  //打印值
  fmt.Printf("%v\n", p)
  //打印值 (带字段)
  fmt.Printf("%+v\n", p)
  //打印值 (带类型、字段)
  fmt.Printf("%#v\n", p)
}