40 lines
779 B
Go
40 lines
779 B
Go
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/*
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* @Author : huangzj
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* @Time : 2021/3/22 11:09
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* @Description：
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*/
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package FullPermutation
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type Permutation struct {
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bytes [][]byte
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}
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func NewPermutation() *Permutation {
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return &Permutation{
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bytes: [][]byte{},
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}
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}
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func (per *Permutation) Recursion(b []byte, start int) {
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//递归交换到最后一个位置结束
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if start == len(b)-1 {
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bCopy := make([]byte, len(b))
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copy(bCopy, b)
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per.bytes = append(per.bytes, bCopy)
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}
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for i := start; i < len(b); i++ {
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//交换固定位置
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b[i], b[start] = b[start], b[i]
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//固定某一个数字位置，递归后面的其他数字
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per.Recursion(b, start+1)
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//还原固定位置，进行下一次操作
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b[i], b[start] = b[start], b[i]
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}
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}
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func (per *Permutation) Reset() {
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per.bytes = [][]byte{}
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}
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