func Print(a ...interface{}) (n int, err error)
func Printf(format string, a ...interface{}) (n int, err error)
func Println(a ...interface{}) (n int, err error)

fmt.Printf("%v\n", 100)  //100
fmt.Printf("%v\n", false) //false
o := struct{ name string }{"你好"}
fmt.Printf("%v\n", o) //{小王子}
fmt.Printf("%#v\n", o) //struct { name string }{name:"小王子"}
fmt.Printf("%T\n", o)//struct { name string }
fmt.Printf("100%%\n")//100%

n := 65
fmt.Printf("%b\n", n) //1000001
fmt.Printf("%c\n", n) //A
fmt.Printf("%d\n", n) //65
fmt.Printf("%o\n", n) //101
fmt.Printf("%x\n", n) //41
fmt.Printf("%X\n", n) //41

f := 12.34
fmt.Printf("%b\n", f)	//6946802425218990p-49
fmt.Printf("%e\n", f)//1.234000e+01
fmt.Printf("%E\n", f)//1.234000E+01
fmt.Printf("%f\n", f)//12.340000
fmt.Printf("%g\n", f)//12.34
fmt.Printf("%G\n", f)//12.34

s := "小王子"
fmt.Printf("%s\n", s)//小王子
fmt.Printf("%q\n", s)//"小王子"
fmt.Printf("%x\n", s)//e5b08fe78e8be5ad90
fmt.Printf("%X\n", s)//E5B08FE78E8BE5AD90

a := 10
fmt.Printf("%p\n", &a) //0xc000094000
fmt.Printf("%#p\n", &a) //c000094000

n := 12.34
fmt.Printf("%f\n", n)
fmt.Printf("%9f\n", n)
fmt.Printf("%.2f\n", n)
fmt.Printf("%9.2f\n", n)
fmt.Printf("%9.f\n", n)

func Fprint(w io.Writer, a ...interface{}) (n int, err error)
func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error)
func Fprintln(w io.Writer, a ...interface{}) (n int, err error)

// 向標(biāo)準(zhǔn)輸出寫(xiě)入內(nèi)容
fmt.Fprintln(os.Stdout, "向標(biāo)準(zhǔn)輸出寫(xiě)入內(nèi)容")
fileObj, err := os.OpenFile("./xx.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
	fmt.Println("打開(kāi)文件出錯(cuò)，err:", err)
	return
}
name := "沙河小王子"
// 向打開(kāi)的文件句柄中寫(xiě)入內(nèi)容
fmt.Fprintf(fileObj, "往文件中寫(xiě)如信息：%s", name)

func Sprint(a ...interface{}) string
func Sprintf(format string, a ...interface{}) string
func Sprintln(a ...interface{}) string

s1 := fmt.Sprint("沙河小王子")
name := "沙河小王子"
age := 18
s2 := fmt.Sprintf("name:%s,age:%d", name, age)
s3 := fmt.Sprintln("沙河小王子")
fmt.Println(s1, s2, s3)

func Errorf(format string, a ...interface{}) erro

e := errors.New("原始錯(cuò)誤e")
w := fmt.Errorf("Wrap了一個(gè)錯(cuò)誤%w", e)

func Fscan(r io.Reader, a ...interface{}) (n int, err error)
func Fscanln(r io.Reader, a ...interface{}) (n int, err error)
func Fscanf(r io.Reader, format string, a ...interface{}) (n int, err error)

func Sscan(str string, a ...interface{}) (n int, err error)
func Sscanln(str string, a ...interface{}) (n int, err error)
func Sscanf(str string, format string, a ...interface{}) (n int, err error)

func Scan(a ...interface{}) (n int, err error)

func main() {
	var (
		name    string
		age     int
		married bool
	)
	fmt.Scan(&name, &age, &married)
	fmt.Printf("掃描結(jié)果 name:%s age:%d married:%t \n", name, age, married)
}

func Scanf(format string, a ...interface{}) (n int, err error)

func main() {
	var (
		name    string
		age     int
		married bool
	)
	fmt.Scanf("1:%s 2:%d 3:%t", &name, &age, &married)
	fmt.Printf("掃描結(jié)果 name:%s age:%d married:%t \n", name, age, married)
}

func Scanln(a ...interface{}) (n int, err error)

func bufioDemo() {
	reader := bufio.NewReader(os.Stdin) // 從標(biāo)準(zhǔn)輸入生成讀對(duì)象
	fmt.Print("請(qǐng)輸入內(nèi)容：")
	text, _ := reader.ReadString('\n') // 讀到換行
	text = strings.TrimSpace(text)
	fmt.Printf("%#v\n", text)
}