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 (
"bufio"
"fmt"
"os"
"strconv"
"strings"
)
const (
// skin options :-)
emptyMark = "☆"
mark1 = "💀"
mark2 = "🎈"
banner = `
~~~~~~~~~~~~~~~
TIC~TAC~TOE
~~~~~~~~~~~~~~~`
maxTurn = 9
)
func main() {
fmt.Println(banner)
loop(bufio.NewScanner(os.Stdin))
}
type game struct {
board [][]string
turn int
player string
}
func loop(in *bufio.Scanner) {
g := newGame()
for {
g.prompt()
if !in.Scan() {
break
}
// Atoi already return 0 on error; no need to check
// it for the following switch to work
pos, _ := strconv.Atoi(in.Text())
msg := g.play(pos)
if msg != "" {
fmt.Println("\n>>>", msg)
continue
}
g.turn++
if msg := g.finito(); msg != "" {
g.print()
fmt.Printf("\n%s\n", msg)
break
}
g.player = switchTo(g.player)
}
}
func newGame() game {
return game{
player: mark1,
board: [][]string{
{emptyMark, emptyMark, emptyMark},
{emptyMark, emptyMark, emptyMark},
{emptyMark, emptyMark, emptyMark},
},
}
}
func (g game) prompt() {
g.print()
fmt.Printf("\n%s [1-9]: ", g.player)
}
func (g game) print() {
fmt.Println()
fmt.Println("---+----+---")
for _, line := range g.board {
fmt.Printf("%s\n", strings.Join(line, " | "))
fmt.Println("---+----+---")
}
}
func (g game) play(pos int) string {
var row int
switch {
case pos >= 7 && pos <= 9:
row = 2
case pos >= 4 && pos <= 6:
row = 1
case pos >= 1 && pos <= 3:
row = 0
default:
return "wrong position"
}
col := pos - row*3 - 1
if g.board[row][col] != emptyMark {
return "already played!"
}
// put the player
g.board[row][col] = g.player
return ""
}
func (g game) finito() string {
switch {
case g.won():
return fmt.Sprintf("WINNER: %s", g.player)
case g.turn == maxTurn:
return "TIE!"
}
return ""
}
func (g game) won() (won bool) {
for _, m := range [2]string{mark1, mark2} {
b, mmm := g.board, strings.Repeat(m, 3)
won = /* horizontals */
strings.Join(b[0], "") == mmm ||
strings.Join(b[1], "") == mmm ||
strings.Join(b[2], "") == mmm ||
/* verticals */
b[0][0]+b[1][0]+b[2][0] == mmm ||
b[0][1]+b[1][1]+b[2][1] == mmm ||
b[0][2]+b[1][2]+b[2][2] == mmm ||
/* diagonals */
b[0][0]+b[1][1]+b[2][2] == mmm ||
b[0][2]+b[1][1]+b[2][0] == mmm
if won {
return true
}
}
return false
}
func switchTo(player string) string {
if player == mark1 {
return mark2
}
return mark1
}
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