Go - you're my type - Defined Types - basic types, operators

Head First Go
楽天ブックス 紀伊國屋書店

開発環境

• macOS Mojave - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Go (プログラミング言語)

Head First Go (Jay McGavren(著)、O'Reilly Media)のChapter 9(you're my type - Defined Types)、Pool Puzzle(270)の解答を求めてみる。

コード

package main

import "fmt"

type Population int

func main() {
 var population Population
 population = Population(572)
 fmt.Println("Sleepy Creek Country population:", population)
 fmt.Println("Congratulations, Kevin and Anna! It's a girl!")
 population += 1
 fmt.Println("Sleepy Creek Country population:", population)
}

入出力結果(Bash、cmd.exe(コマンドプロンプト)、Terminal)

$ go run sample1.go
Sleepy Creek Country population: 572
Congratulations, Kevin and Anna! It's a girl!
Sleepy Creek Country population: 573
$