简单掌握桶排序算法及C++版的代码实现
发布时间:2020-12-16 05:23:31 所属栏目:百科 来源:网络整理
导读:桶排序介绍 桶排序(Bucket Sort)的原理很简单,它是将数组分到有限数量的桶子里。 假设待排序的数组a中共有N个整数,并且已知数组a中数据的范围[0,MAX)。在桶排序时,创建容量为MAX的桶数组r,并将桶数组元素都初始化为0;将容量为MAX的桶数组中的每一个单元
桶排序介绍 C++实现算法 #include<iterator> #include<iostream> #include<vector> using namespace std; const int BUCKET_NUM = 10; struct ListNode{ explicit ListNode(int i=0):mData(i),mNext(NULL){} ListNode* mNext; int mData; }; ListNode* insert(ListNode* head,int val){ ListNode dummyNode; ListNode *newNode = new ListNode(val); ListNode *pre,*curr; dummyNode.mNext = head; pre = &dummyNode; curr = head; while(NULL!=curr && curr->mData<=val){ pre = curr; curr = curr->mNext; } newNode->mNext = curr; pre->mNext = newNode; return dummyNode.mNext; } ListNode* Merge(ListNode *head1,ListNode *head2){ ListNode dummyNode; ListNode *dummy = &dummyNode; while(NULL!=head1 && NULL!=head2){ if(head1->mData <= head2->mData){ dummy->mNext = head1; head1 = head1->mNext; }else{ dummy->mNext = head2; head2 = head2->mNext; } dummy = dummy->mNext; } if(NULL!=head1) dummy->mNext = head1; if(NULL!=head2) dummy->mNext = head2; return dummyNode.mNext; } void BucketSort(int n,int arr[]){ vector<ListNode*> buckets(BUCKET_NUM,(ListNode*)(0)); for(int i=0;i<n;++i){ int index = arr[i]/BUCKET_NUM; ListNode *head = buckets.at(index); buckets.at(index) = insert(head,arr[i]); } ListNode *head = buckets.at(0); for(int i=1;i<BUCKET_NUM;++i){ head = Merge(head,buckets.at(i)); } for(int i=0;i<n;++i){ arr[i] = head->mData; head = head->mNext; } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |