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 "fmt"
/*
~ TICTACTOE GAME IN GO ~
+ This example uses the very basics of the Go language.
+ The goal is learning all the basics.
*/
func main() {
/*
VERSION #1: Declare variables
Every type has a zero-value:
numeric types => 0
bool => false
string => ""
*/
// var banner string
// var board string
// var turn int
// var maxTurns int
// var won bool
/*
VERSION #2: Declare variables parallel (same as above)
turn and lastPos are int
won and wrongMove are bool
*/
// var banner, board string
// var turn, maxTurns int
// var won bool
/*
VERSION #3: Declare variables in a group and parallel (same as above)
*/
// var (
// banner, board string
// turn, maxTurns int
// won bool
// )
/*
VERSION #4: Declare variables in a group (same as above)
*/
var (
banner string // tictactoe banner
board string // tictactoe board
turn int // total valid turns played
maxTurns int // maximum number of turns
won bool // is there any winner?
progress float64 // remaining progress
)
/*
#5: Assignment
*/
banner = " TIC~TAC~TOE"
board = `
/---+---+---\
| | X | |
+---+---+---+
| | O | |
+---+---+---+
| | | |
\---+---+---/`
// maxTurns = 9
// turn = 2
// multiple assignment
maxTurns, turn = 9, 2
// cannot assign int to float
// progress = 1 - (turn / maxTurns) * 100
// convert ints to float so that the result will be float
// literals are typeless: they automatically get converted to the surrounding operands
progress = (1 - (float64(turn) / float64(maxTurns))) * 100
fmt.Println(banner)
fmt.Println(board)
fmt.Println()
fmt.Printf("Current Turn : %d\n", turn)
fmt.Printf("Is there a winner : %t\n", won)
fmt.Printf("Turns left : %.1f%%\n", progress)
// This is also valid: the expression is evaluated on the fly.
// fmt.Printf("Turns left : %.1f%%\n",
// (1 - (float64(turn) / float64(maxTurns))) * 100)
}
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