n, err := fmt.Fscanf(r, "%d %t %s", &i, &b, &s)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Fscanf: %v\n", err)
	}
	fmt.Println(i, b, s)
	fmt.Println(n)
	// Output:
	// 5 true gophers
	// 3
}

func ExampleFscanln() {
	s := `dmr 1771 1.61803398875
	ken 271828 3.14159`
	r := strings.NewReader(s)
	var a string
	var b int
	var c float64
	for {
		n, err := fmt.Fscanln(r, &a, &b, &c)
		if err == io.EOF {
			break