https://blog.csdn.net/hanjing_1995/article/details/51539599

從尾到頭打印單鏈表

[cpp]?view plaincopy

void?FromTailToHeadPrint(SListNode*&?head)??

{??

????stack<SListNode*>?s;??

????SListNode*?cur?=?head;??

????while?(cur)??

????{??

????????s.push(cur);??

????????cur?=?cur->_next;??

????}??

??

????while?(!s.empty())??

????{??

????????cout?<<?s.top()->_data?<<"->";??

????????s.pop();??

????}??

????cout?<<?""<<endl;??

}??

2.刪除一個無頭單鏈表的非尾節點

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void?Erase(SListNode*&?head,SListNode*?pos)??

{??

????//分情況：空節點、一個節點、兩個節點、三個節點??

????if?(head?==?NULL?||?pos==NULL)??

????{??

????????return;??

????}??

??????

????if?(head?==?pos)??

????{??

????????free(head);??

????????head?=?NULL;??

????????return;??

????}??

??

????SListNode*?cur?=?head;??

????while?(cur)??

????{??

????????SListNode*?next?=?cur->_next;??

??????????

????????if?(next?==?pos)??

????????{??

????????????//若只有兩個節點，pos=next,nextnext=NULL，cur->_next?=?nextnext;??

????????????//（即使題設未說明刪除非尾節點）依然可以刪除成功。??

????????????SListNode*?nextnext?=?next->_next;??

????????????cur->_next?=?nextnext;??

????????????free(next);??

????????????next?=?NULL;??

????????}??

????????cur?=?cur->_next;??

????}??

}??

3.逆置、反轉單鏈表

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void?Reverse(SListNode*&?head)??

{??

????if?(head?==?NULL)??

????{??

????????return;??

????}??

????SListNode*?cur?=?head;??

????SListNode*?next?=?NULL;??

????while?(cur)??

????{??

????????SListNode*?tmp?=?cur;??

????????cur?=?cur->_next;??

????????tmp->_next?=?next;??

????????next?=?tmp;??

????????head?=?tmp;??

????}??

}??

4.單鏈表冒泡排序

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void?BubbleSort(SListNode*&?head)??

{??

????//空節點或一個節點直接返回??

????if?(head?==?NULL?||?head->_next?==?NULL)??

????{??

????????return;??

????}??

??????

????SListNode*?begin?=?head;??

????SListNode*?cur?=?head;??

??

????while?(begin->_next)??

????{??????????

????????while?(cur->_next)??

????????{??

????????????if?(cur->_data?>?cur->_next->_data)??

????????????{??

????????????????swap(cur->_data,?cur->_next->_data);??

????????????}??

????????????cur?=?cur->_next;??

????????}??

????????begin?=?begin->_next;??

????}??

}??

5.查找單鏈表的中間節點，要求只能遍歷一次鏈表

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SListNode*?FindMiddle(SListNode*&?head)??

{??

????if?(head?==?NULL)??

????{??

????????return?NULL;??

????}??

????SListNode*?slow?=?head;??

????SListNode*?fast?=?head;??

??

????while?(fast->_next)??

????{??

????????if?(fast->_next)??

????????{??

????????????fast?=?fast->_next;??

????????????if?(fast->_next)??

????????????{??

????????????????fast?=?fast->_next;??

????????????}??

????????????else??

????????????{??

????????????????return?slow;??

????????????}??

????????????slow?=?slow->_next;??

????????}??

????????else??

????????{??

????????????return?NULL;??

????????}??

????}??

??????

????return?slow;??

}??

6.查找單鏈表的倒數第k個節點，要求只能遍歷一次鏈表

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SListNode*?FindLastK(SListNode*&?head,int?k)??

{??

????assert(k?>?0);??

????if?(head?==?NULL)??

????{??

????????return?NULL;??

????}??

????SListNode*?slow?=?head;??

????SListNode*?fast?=?head;??

????while?(k--)??

????{??

????????if?(fast->_next)??

????????{??

????????????fast?=?fast->_next;??

????????}??

????????else??

????????{??

????????????return?NULL;??

????????}??

????}??

????slow?=?slow->_next;??

????while?(fast->_next)??

????{??

????????fast?=?fast->_next;??

????????slow?=?slow->_next;??

????}??

????return?slow;??

}??

本文出自 “Han Jing's Blog” 博客，請務必保留此出處http://10740184.blog.51cto.com/10730184/1772313

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