希尔排序(golang实现)

封装成函数:

func ShellSort(a []int) {
    n := len(a)
    h := 1
    for h < n/3 { //寻找合适的间隔h
        h = 3*h + 1
    }
    for h >= 1 {
        //将数组变为间隔h个元素有序
        for i := h; i < n; i++ {
            //间隔h插入排序
            for j := i; j >= h && a[j] < a[j-h]; j -= h {
                swap(a, j, j-h)
            }
        }
        h /= 3
    }
}
 
func swap(slice []int, i int, j int) {
    slice[i], slice[j] = slice[j], slice[i]
}

测试:

s := []int{9,0,6,5,8,2,1,7,4,3}
fmt.Println(s)
ShellSort(s)
fmt.Println(s)

输出:
[9 0 6 5 8 2 1 7 4 3]
[0 1 2 3 4 5 6 7 8 9]

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