main.go 源码
// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
package main
import "fmt"
// STORY:
// Hipster's Love store publishes limited books
// twice a year.
//
// The number of books they publish is fixed at 4.
// So, let's create a 4 elements string array for the books.
const (
winter = 1
summer = 3
yearly = winter + summer
)
func main() {
// var books [4]string
// var books [1 + 3]string
var books [yearly]string
books[0] = "Kafka's Revenge"
books[1] = "Stay Golden"
books[2] = "Everythingship"
books[3] += books[0] + " 2nd Edition"
// --------------------
// INDEXING
// --------------------
// Go compiler can catch indexing errors when constant is used
// books[4] = "Neverland"
// Go compiler cannot catch indexing errors when non-constant is used
// i := 4
// books[i] = "Neverland"
// --------------------
// PRINTING ARRAYS
// --------------------
// print the type
fmt.Printf("books : %T\n", books)
// print the elements
fmt.Println("books :", books)
// print the elements in quoted string
fmt.Printf("books : %q\n", books)
// print the elements along with their types
fmt.Printf("books : %#v\n", books)
}
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