golang 快速排序
package main
import (
"fmt"
"strconv"
)
func quickSort(arr []int, low, high int) {
if low < high {
var pivot = partition(arr, low, high)
quickSort(arr, low, pivot)
quickSort(arr, pivot + 1, high)
}
}
func partition(arr []int,low,high int) int {
var pivot = arr[low]
var i = low
var j= high
// 6 5 4 3 2 1
// 6 1 2 3 4 7
for i< j{
for arr[j] >= pivot && j > low {
j--
}
//
for arr[i]<= pivot && i<high{
i++
}
if i<j {
arr[i],arr[j]=arr[j],arr[i]
}
}
arr[low],arr[j] = arr[j],pivot
//
return j
}
func printArray(arr []int) {
for i := 0; i < len(arr); i++ {
fmt.Print(strconv.Itoa(arr[i]) + " ")
}
fmt.Println("")
}
func main() {
var arr = []int { 15, 3, 12, 6, -9, 9, 0,8,8 }
fmt.Print("Before Sorting: ")
printArray(arr)
quickSort(arr, 0, len(arr) - 1)
fmt.Print("After Sorting: ")
printArray(arr)
}
参考文件:
Quick Sort Algorithm in Go Programming
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