package main

import "fmt"
/*
 * Using recover in the defer function.  This is a just variation on the
 * the last example.
 */

func demo() {
	// Keep count and total of entered numbers.
	tot := 0
	count := 0

	// Cleanup to give the final stats.
	defer func() {
		err := recover()
		if err != nil {
			// The %v conversion is "the value in a default format"
			// That is, just make it work.
			fmt.Printf("Ooops! %v\n", err)
		}
		fmt.Printf("=== You entered %d numbers, average %g ===\n",
			count, float32(tot)/float32(count))
	} ()

	// Words for input numbers.
	words := [20]string {
		"water", "land", "air", "sea", "horizon",
		"skyline", "landscape", "wind", "snow", "rain",
		"sunset", "sunrise", "eclipse", "nightime", "moonshine",
		"mountain", "plane", "valley", "lake", "firth" }

	// Read numbers and print them, with their words.
	for {
		// Read a number.
		var val int
		fmt.Print("Pls enter a number: ")
		rdct, _ := fmt.Scan(&val)
		if rdct == 0 {
			break
		}

		// Special handling.
		if val == 42 {
			panic("Failed to ask for the question")
		}

		// Print the number and its word.
		fmt.Printf("You entered %d: %s\n", val, words[val])

		// Count and total.
		count++
		tot += val
	}
}

func main() {
	demo()
	fmt.Println("And now we are done.")
}