编辑代码

#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

#define OK 1
#define ERROR 0
typedef int Status;
typedef string ElemType;

struct Node {
    ElemType data;
    Node* next;
};
typedef Node* LinkList;

int length = 0;

Status InitList_L(LinkList &L) {
    L = new Node;
    L->next = nullptr;
    return OK;
}

Status GetElem_L(LinkList L, int i, ElemType &e) {
    Node* p = L->next;
    int j = 1;
    while (j < i && p) {
        p = p->next;
        ++j;
    }
    if (!p || j > i) return ERROR;
    e = p->data;
    return OK;
}

Node* LocateElem_L(LinkList L, const ElemType &e) {
    Node* p = L->next;
    while (p && p->data != e) p = p->next;
    return p;
}

Status ListInsert_L(LinkList &L, int i, const ElemType &e) {
    Node* p = L;
    int j = 0;
    while (p && j < i - 1) {
        p = p->next;
        ++j;
    }
    if (!p || j > i - 1) return ERROR;
    Node* s = new Node{e, p->next};
    p->next = s;
    ++length;
    return OK;
}

Status ListDelete_L(LinkList &L, int i) {
    Node* p = L;
    int j = 0;
    while (p->next && j < i - 1) {
        p = p->next;
        ++j;
    }
    if (!(p->next) || j > i - 1) return ERROR;
    Node* q = p->next;
    p->next = q->next;
    delete q;
    --length;
    return OK;
}

void ClearList(LinkList &L) {
    while (L) {
        Node* temp = L;
        L = L->next;
        delete temp;
    }
}

// 初始化二十四节气数据
void InitSolarTerms(LinkList &L) {
    string terms[] = {
        "立春", "雨水", "惊蛰", "春分", "清明", "谷雨",
        "立夏", "小满", "芒种", "夏至", "小暑", "大暑",
        "立秋", "处暑", "白露", "秋分", "寒露", "霜降",
        "立冬", "小雪", "大雪", "冬至", "小寒", "大寒"
    };
    for (int i = 0; i < 24; ++i) {
        ListInsert_L(L, i + 1, terms[i]);
    }
    length = 24;
}

int main() {
    LinkList list;
    InitList_L(list);
    InitSolarTerms(list); // 初始化节气数据

    int choose;
    while (true) {
        cout << "\n===== 二十四节气管理系统 =====\n";
        cout << "1. 插入节气（位置从" << length + 1 << "开始）\n";
        cout << "2. 删除节气\n";
        cout << "3. 按位置查询（1-" << length << "）\n";
        cout << "4. 按名称查询\n";
        cout << "5. 显示所有节气\n";
        cout << "0. 退出系统\n";
        cout << "请输入操作码：";

        cin >> choose;
        cin.ignore(); // 清除输入缓冲区

        switch (choose) {
            case 1: {
                string term;
                cout << "输入节气名称（不超过10字）：";
                getline(cin, term);
                if (term.empty()) {
                    cout << "输入无效！\n";
                    continue;
                }
                ListInsert_L(list, length + 1, term);
                cout << "插入成功！当前节气总数：" << ++length << endl;
                break;
            }
            case 2: {
                int pos;
                cout << "输入要删除的位置（1-" << length << "）：";
                cin >> pos;
                if (ListDelete_L(list, pos)) {
                    cout << "删除成功！当前节气总数：" << --length << endl;
                } else {
                    cout << "删除失败！位置无效或列表为空\n";
                }
                break;
            }
            case 3: {
                int pos;
                cout << "输入查询位置（1-" << length << "）：";
                cin >> pos;
                ElemType term;
                if (GetElem_L(list, pos, term)) {
                    cout << "位置" << pos << "的节气是：" << term << endl;
                } else {
                    cout << "查询失败！位置超出范围\n";
                }
                break;
            }
            case 4: {
                string term;
                cout << "输入要查询的节气名称：";
                getline(cin, term);
                Node* node = LocateElem_L(list, term);
                if (node) {
                    cout << "找到节气：" << node->data 
                         << "（位置：" << node->data << "）\n";
                } else {
                    cout << "未找到该节气！\n";
                }
                break;
            }
            case 5: {
                cout << "\n当前节气列表：\n";
                Node* p = list->next;
                int count = 0;
                while (p) {
                    cout << setw(4) << ++count << ": " 
                         << setw(10) << p->data << endl;
                    p = p->next;
                }
                cout << "共计 " << length << " 个节气\n";
                break;
            }
            case 0: {
                ClearList(list);
                cout << "\n系统已退出，感谢使用！\n";
                return 0;
            }
            default: {
                cout << "无效操作码，请重新输入！\n";
            }
        }
    }
    return 0;
}