Goでモンティ・ホール問題を試してみる ref: https://qiita.com/YmgchiYt/items/1ce7d39309de5406953e

file0.go

func game(change bool) int {
    choice := rand.Intn(3)
    prize := rand.Intn(3)

    if change {
        var opened int
        for {
            opened = rand.Intn(3)
            if opened != prize && opened != choice {
                break
            }
        }

        orgChoice := choice
        for {
            choice = rand.Intn(3)
            if choice != opened && choice != orgChoice {
                break
            }
        }
    }

    if choice == prize {
        return 1
    }
    return 0
}

func play(count int, change bool) float64 {
    var point int
    for i := 0; i < count; i++ {
        point += game(change)
    }
    return float64(point) / float64(count)
}

func main() {
    fmt.Printf("no change: %f\n", play(100000, false))
    fmt.Printf("change   : %f\n", play(100000, true))
}

file1.txt

no change: 0.333920
change   : 0.665360