package main
import (
"fmt"
"math/rand"
"time"
)
//生成count个[start,end)结束的不重复的随机数
func GenerateRandomNumber(start int, end int, count int) []int {
//范围检查
if end < start || (end-start) < count {
return nil
}
//存放结果的slice
nums := make([]int, 0)
//随机数生成器,加入时间戳保证每次生成的随机数不一样
r := rand.New(rand.NewSource(time.Now().UnixNano()))
for len(nums) < count {
//生成随机数
num := r.Intn((end - start)) + start
//查重
exist := false
for _, v := range nums {
if v == num {
exist = true
break
}
}
if !exist {
nums = append(nums, num)
}
}
return nums
}
func main() {
fmt.Println(GenerateRandomNumber(1,30,5))
}