猜数字游戏,用到了生成随机数

 

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "math/rand"
 6     "strconv"
 7     "time"
 8 )
 9 
10 func main() {
11     //生成一个随机数
12     myRand := rand.New(rand.NewSource(time.Now().UnixNano()))
13     answer := myRand.Intn(1000)
14 
15     fmt.Println("按Q可退出")
16 
17     for {
18 
19         //接收用户的输入
20         fmt.Println("请输入你的猜想: ")
21 
22         var guess string
23         fmt.Scan(&guess)
24 
25         //用户想要提前退出
26         if guess == "q" || guess == "Q" {
27             break
28         }
29 
30         //用户的输入转换成整数
31         guessNum, _ := strconv.Atoi(guess)
32 
33         //反馈猜测的结果
34         switch {
35         case guessNum > answer:
36             fmt.Println(guessNum,"太大了....")
37         case guessNum < answer:
38             fmt.Println(guessNum,"太小了....")
39         default:
40             fmt.Println("没错,我让你猜的就是",guessNum)
41             break
42         }
43     }
44 }