下面实现的是一个简单的单链表
功能不多,学习使用
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#pragma once#include <iostream>using
namespace std;class
ListEx{private: struct
Node { Node* next; int
data; Node(const
Node& node): data(node.data), next(nullptr) {} Node(const
T& d): data(d), next(nullptr) {} };private: Node* head; int
n; //索引public: ListEx(): head(nullptr), n(0) {} Node* getp(int
pos) { if
(pos < 0 || pos > n) { return
nullptr; } if
(pos == 0) { return
head; } Node* p = head; for
(int i = 1; i < pos; i++) { p = p->next; } return
p->next; } void
travel() { Node* p = head; if
(p == nullptr) { return; } p = p->next; while
(p) { cout << p->data << "\t"
<< endl; p = p->next; } } void
insert(int
d, int
pos = -1) { if
(head == nullptr) { head = new
Node(0); Node* p = new
Node(d); head->next = p; p->next = nullptr; } //添加到最后 else
if (pos < 0 || pos > n) { Node* p = getp(n); Node* node = new
Node(d); p->next = node; node = nullptr; } //添加到pos位置 else { Node* node = new
Node(d); Node* p = getp(n - 1); Node* q = p->next; p->next = node; node->next = q; } ++n; } //从pos开始查找data 为d的元素,默认从0开始 int
find(int
d, int
pos = 0) { Node* p = getp(pos); if
(p == nullptr) { return
-1; } while
(p) { if
(p->data == d) { return
pos; } pos++; p = p->next; } return
-1; } //从pos开始删除data为d的元素 bool
erase(int
d, int
pos = 0) { int
nIndex = find(d, pos); if
(nIndex == -1) { return
false; } Node* p = getp(nIndex - 1); Node* q = getp(nIndex); if
(p == nullptr) { return
false; } p->next = q->next; delete
q; return
true; }}; |
原文：http://www.cnblogs.com/start1225/p/3772961.html