lifegame

lifegame.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

const (
	clear   = "\033[2J"
	head    = "\033[1;1H"
	areaX   = 30
	areaY   = 30
	loopCnt = 100
)

var sc1 [areaX + 2][areaY + 2]int
var sc2 [areaX + 2][areaY + 2]int
var str string

func initialize() {
	rand.Seed(time.Now().UnixNano())
	for x := 1; x < areaX+1; x++ {
		for y := 1; y < areaY+1; y++ {
			sc1[x][y] = rand.Intn(2)
		}
	}
}

func lifeChange() {
	for x := 1; x < areaX+1; x++ {
		for y := 1; y < areaY+1; y++ {
			lifeEnv := sc1[x-1][y-1] + sc1[x-1][y] + sc1[x-1][y+1] + sc1[x][y-1] + sc1[x][y+1] + sc1[x+1][y-1] + sc1[x+1][y] + sc1[x+1][y+1]
			if sc1[x][y] == 0 {
				if lifeEnv == 3 {
					sc2[x][y] = 1
				} else {
					sc2[x][y] = 0
				}
			} else {
				if lifeEnv <= 1 {
					sc2[x][y] = 0
				} else if lifeEnv <= 3 {
					sc2[x][y] = 1
				} else {
					sc2[x][y] = 0
				}
			}
		}
	}
	sc1 = sc2
}

func drawView() {
	fmt.Print(clear)
	fmt.Print(head)
	for y := 1; y <= areaY; y++ {
		for x := 1; x <= areaX; x++ {
			if sc1[x][y] == 0 {
				str = " "
			} else {
				str = "O"
			}
			fmt.Print(str)
		}
		fmt.Println()
	}
}

func main() {
	initialize()
	drawView()
	for i := 0; i < loopCnt; i++ {
		lifeChange()
		drawView()
		time.Sleep(10 * time.Millisecond)
	}
}