package main

import "fmt"

func main() {
	var a1 [3]bool

	var a2 = [...]int{1, 2, 3}
	fmt.Printf("a1: %T\n", a1)
	fmt.Println(a2)

	a3 := [...]int{1: 1, 4: 2}
	fmt.Println(a3)

	a := [3][2]string{
		{"北京", "上海"},
		{"广州", "深圳"},
		{"成都", "重庆"},
	}
	for _, v1 := range a {
		for _, v2 := range v1 {
			fmt.Printf("%s\t", v2)
		}
		fmt.Println()
	}
}