参考 http://www.cnblogs.com/skywang12345/p/3561803.html在此致谢!
采用C++,实现了单链表和双向循环链表:
1. 单链表
1 #ifndef SINGLE_LIST_H 2 #define SINGLE_LIST_H 3 4 #ifndef INT_MAX 5 #define INT_MAX 2147483647 6 #define INT_MIN (-INT_MAX - 1) 7 #endif 8 #define ERROR INT_MIN 9 #define OK 0 10 #ifndef NULL 11 #define NULL 0 12 #endif 13 template<class T> 14 struct ListNode { 15 T var; 16 ListNode<T> *next; 17 ListNode() : next(NULL) { } 18 ListNode(T v, ListNode<T> *p = NULL) { 19 var = v; 20 next = p; 21 } 22 }; 23 24 template<class T> 25 class Mylist { 26 public: 27 Mylist(); 28 ~Mylist(); 29 30 int size(); 31 bool empty(); 32 33 int insert(int i, T t); 34 int append(T t); 35 int insert_first(T t); 36 37 T get(int i); 38 39 int erase(int i); 40 41 private: 42 ListNode<T> *head; 43 int len; 44 }; 45 template<class T> 46 Mylist<T>::Mylist() { 47 len = 0; 48 head = new ListNode<T>(); 49 } 50 template<class T> 51 Mylist<T>::~Mylist() { 52 if(head) { 53 int i = 0; 54 ListNode<T> *p = NULL; 55 while(i++ < len) { 56 p = head->next; 57 head->next = p->next; 58 delete p; 59 } 60 } 61 delete head; 62 } 63 template<class T> 64 int Mylist<T>::size() { 65 return len; 66 } 67 template<class T> 68 bool Mylist<T>::empty() { 69 return 0 == len; 70 } 71 template<class T> 72 int Mylist<T>::insert(int i, T t) { 73 if(i < 1 || i > len && len) return ERROR; 74 75 ListNode<T> *p = head; 76 int j = 1; 77 while(p && j++ < i) { p = p->next; } 78 79 ListNode<T> *s = p->next; 80 p->next = new ListNode<T>(t); 81 p->next->next = s; 82 83 len++; 84 return OK; 85 } 86 template<class T> 87 int Mylist<T>::append(T t) { 88 ListNode<T> *p = head; 89 int j = 0; 90 while(p && j++ < len) { p = p->next; } 91 p->next = new ListNode<T>(t); 92 len++; 93 return OK; 94 } 95 template<class T> 96 int Mylist<T>::insert_first(T t) { 97 return insert(1, t); 98 } 99 template<class T> 100 T Mylist<T>::get(int i) { 101 if(i < 1 || i > len) return ERROR; 102 ListNode<T> *p = head->next; 103 int j = 1; 104 while(p && j < i) { p = p->next; j++; } 105 return p->var; 106 } 107 template<class T> 108 int Mylist<T>::erase(int i) { 109 if(i < 1 || i > len) return ERROR; 110 ListNode<T> *p = head; 111 int j = 1; 112 while(p && j < i) { p = p->next; j++; } 113 114 ListNode<T> *s = p->next; 115 p->next = s->next; 116 delete s; 117 118 len--; 119 return OK; 120 } 121 122 #endif
2. 双向循环链表
1 #ifndef BI_LINK_H 2 #define BI_LINK_H 3 4 #ifndef INT_MAX 5 #define INT_MAX 0x8fffffff 6 #define INT_MIN (-INT_MAX - 1) 7 #endif 8 #define ERROR INT_MIN 9 #define OK 0 10 #ifndef NULL 11 #define NULL 0 12 #endif 13 14 template<class T> 15 struct BLinkNode { 16 T var; 17 BLinkNode<T> *prev; 18 BLinkNode<T> *next; 19 BLinkNode() : prev(NULL), next(NULL) { } 20 BLinkNode(T v, BLinkNode<T> *p = NULL, BLinkNode<T> *n = NULL) : var(v), prev(p), next(n) { } 21 }; 22 23 template<class T> 24 class Bilink { 25 public: 26 Bilink(); 27 ~Bilink(); 28 29 int size(); 30 bool empty(); 31 32 T get(int index); 33 T get_first(); 34 T get_last(); 35 36 int insert(int index, T t); 37 int insert_first(T t); 38 int append_last(T t); 39 40 int erase(int index); 41 int erase_first(); 42 int erase_last(); 43 private: 44 int len; 45 BLinkNode<T> *head; 46 }; 47 48 template<class T> 49 Bilink<T>::Bilink():len(0) { 50 head = new BLinkNode<T>(); 51 head->prev = head->next = head; 52 } 53 template<class T> 54 Bilink<T>::~Bilink() { 55 BLinkNode<T> *p = NULL; 56 int i = 0; 57 while(i++ < len) { 58 p = head->next; 59 head->next = p->next; 60 delete p; 61 } 62 delete head; 63 } 64 template<class T> 65 int Bilink<T>::size() { 66 return len; 67 } 68 template<class T> 69 bool Bilink<T>::empty() { 70 return 0 == len; 71 } 72 template<class T> 73 T Bilink<T>::get(int index) { 74 if(index < 1 || index > len) return head->var; 75 int i = 0; 76 BLinkNode<T> *p = head; 77 while(i++ < index) { 78 p = p->next; 79 } 80 return p->var; 81 } 82 template<class T> 83 T Bilink<T>::get_first() { 84 if(len) { 85 return head->next->var; 86 } 87 return head->var; 88 } 89 template<class T> 90 T Bilink<T>::get_last() { 91 if(len) { 92 return head->prev->var; 93 } 94 return head->var; 95 } 96 template<class T> 97 int Bilink<T>::insert(int index, T t) { 98 if(index < 1 || index > len && len) return ERROR; 99 if(index == 1) return insert_first(t); 100 int mid = (len + 1) >> 1; 101 BLinkNode<T> *p = head; 102 BLinkNode<T> *s = new BLinkNode<T>(t); 103 int i = 1; 104 if(index <= mid) { 105 while(i++ < index) { p = p->next; } 106 s->prev = p; 107 s->next = p->next; 108 p->next->prev = s; 109 p->next = s; 110 } 111 else { 112 while(i++ <= index) { p = p->prev; } 113 s->next = p; 114 s->prev = p->prev; 115 p->prev->next = s; 116 p->prev = s; 117 } 118 len++; 119 return OK; 120 } 121 template<class T> 122 int Bilink<T>::insert_first(T t) { 123 BLinkNode<T> *s = new BLinkNode<T>(t); 124 BLinkNode<T> *p = head; 125 s->prev = p; 126 s->next = p->next; 127 p->next->prev = s; 128 p->next = s; 129 len++; 130 return OK; 131 } 132 template<class T> 133 int Bilink<T>::append_last(T t) { 134 BLinkNode<T> *s = new BLinkNode<T>(t); 135 BLinkNode<T> *p = head; 136 s->prev = p->prev; 137 s->next = p; 138 p->prev->next = s; 139 p->prev = s; 140 len++; 141 return OK; 142 } 143 template<class T> 144 int Bilink<T>::erase(int index) { 145 if(index < 1 || index > len) { return ERROR; } 146 BLinkNode<T> *p = head; 147 int mid = len >> 1; 148 int i = 1; 149 if(index <= len) { 150 while(i++ < index) { p = p->next; } 151 BLinkNode<T> *s = p->next; 152 s->next->prev = p; 153 p->next = s->next; 154 delete s; 155 } 156 else { 157 while(i++ < index) { p = p->prev; } 158 BLinkNode<T> *s = p->prev; 159 s->prev->next = p; 160 p->prev = s->prev; 161 delete s; 162 } 163 len--; 164 return OK; 165 } 166 template<class T> 167 int Bilink<T>::erase_first() { 168 if(!len) return ERROR; 169 BLinkNode<T> *p = head; 170 BLinkNode<T> *s = p->next; 171 s->next->prev = p; 172 p->next = s->next; 173 len--; 174 return OK; 175 } 176 template<class T> 177 int Bilink<T>::erase_last() { 178 if(!len) return ERROR; 179 BLinkNode<T> *p = head; 180 BLinkNode<T> *s = p->prev; 181 s->prev->next = p; 182 p->prev = s->prev; 183 len--; 184 return OK; 185 } 186 187 #endif
由于本人水平有限,文章中难免有不当和错误之处,欢迎大家批评指正,愿共同进步!!!
时间: 2024-10-09 21:38:23