You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 30_快速排序.go
    path of file: ./repos/learning/golang/source_code/Go语言基础与提升课程资料/源码
    
    the code of the file until where you have to start completion: package main

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

func main() {
	rand.Seed(time.Now().UnixNano()) //产生随机
    
func main() {
	rand.Seed(time.Now().UnixNano()) //产生随机数种子
	arr := make([]int, 0)
	for i := 0; i < 11; i++ {
		arr = append(arr, rand.Intn(100)) //[0,100)
	}
	fmt.Println("排序之前的切片内容为：", arr)
	quickSort(0, len(arr)-1, arr)
	fmt.Println("排序之后的切片为：", arr)
}