Go言語でじゃんけんゲーム

janken.go

package main
import "fmt"
import "math/rand"
import "time"

type Player struct {
    name  string
    point byte
    hand  byte
}

func show_hand(hand byte) string {
    hn := [...]string{"グー", "チョキ", "パー"}
    return hn[hand - 1]
}

func judge(p1 *Player, p2 *Player) {
    h1, h2 := p1.hand, p2.hand
    fmt.Printf("%s　対　%s で　", show_hand(h2), show_hand(h1))
    var win *Player
    if h1 == h2 {
        fmt.Println("引き分けです。")
        return
    } else if (h2 - h1) % 3 == 2 {
        win = p2
    } else {
        win = p1
    }
    fmt.Printf("%sの勝ちです。\n", win.name)
    win.point++
}

func game(p1 *Player, p2 *Player, n int) {
    fmt.Printf("*** %d回戦 ***\n", n)
    
    p1.hand = 0
    p2.hand = 0
    
    for p1.hand < 1 || 3 < p1.hand {
        fmt.Printf("%sの手を入力して下さい（1:グー, 2:チョキ, 3:パー）：", p1.name)
        fmt.Scanf("%d", &p1.hand)
    }
    p2.hand = byte(rand.Intn(3) + 1)
    
    judge(p1, p2)
}

func final_winner(p1 *Player, p2 *Player) {
    po1, po2 := p1.point, p2.point
    fmt.Println("\n*** 最終結果 ***")
    fmt.Printf("%d 対 %d で　", po2, po1)
    var win *Player
    if po1 == po2 {
        fmt.Println("引き分けです。")
        return
    } else if po1 > po2 {
        win = p1
    } else {
        win = p2
    }
    fmt.Printf("%sの勝ちです。\n", win.name)
}

func main() {
    rand.Seed(time.Now().UnixNano())
    
    man := &Player{point: 0}
    cpu := &Player{name: "Comuputer", point: 0}
    
    fmt.Print("あなたの名前を入力して下さい：")
    fmt.Scanf("%s", &man.name)
    fmt.Printf("%s　対　%s　：じゃんけん開始\n\n", cpu.name, man.name)
    
    for i := 1; i <= 5; i++ {
        game(man, cpu, i)
    }
    
    final_winner(man, cpu)
}