2. 建立一个链表，每个结点包括：学号、姓名、性别、年龄。输入一个年龄，如果链表中的结点所包含的年龄等于此年龄，则将此结点删去。要求运行界面如下所示(具体测试用例请考虑周全)： Please input number of students: 3 Please input information of NO.1 student: 01 kitty F 20 Please input information of NO.2 student: 04 Mark M 19 Please input information of NO.3 student: 05 Jolson M 19 The linked list of students: 01 kitty F 20 04 Mark M 19 05 Jolson M 19 Please input the age of student to delete: 20 Deleted Linked list of students: 04 Mark M 19 05 Jolson M 19

好的，下面是完整的C++代码实现：

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

// 定义链表节点结构体
struct Node {
    string id;      // 学号
    string name;    // 姓名
    char gender;    // 性别
    int age;        // 年龄
    Node* next;     // 指向下一个节点的指针
};

// 创建链表函数
Node* createList() {
    Node* head = NULL;
    int n;
    cout << "Please input number of students: ";
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cout << "Please input information of NO." << i << " student: ";
        Node* node = new Node;
        cin >> node->id >> node->name >> node->gender >> node->age;
        node->next = head;
        head = node;
    }
    return head;
}

// 删除指定年龄节点函数
Node* deleteNode(Node* head, int age) {
    Node* prev = NULL;
    Node* curr = head;
    while (curr) {
        if (curr->age == age) {
            if (prev) {
                prev->next = curr->next;
                delete curr;
                curr = prev->next;
            } else {
                head = curr->next;
                delete curr;
                curr = head;
            }
        } else {
            prev = curr;
            curr = curr->next;
        }
    }
    return head;
}

// 输出链表函数
void printList(Node* head) {
    cout << "The linked list of students: ";
    Node* curr = head;
    while (curr) {
        cout << curr->id << " " << curr->name << " " << curr->gender << " " << curr->age << "  ";
        curr = curr->next;
    }
    cout << endl;
}

int main() {
    Node* head = createList();
    printList(head);
    int age;
    cout << "Please input the age of student to delete: ";
    cin >> age;
    head = deleteNode(head, age);
    printList(head);
    return 0;
}

运行结果：

Please input number of students: 3
Please input information of NO.1 student: 01 kitty F 20
Please input information of NO.2 student: 04 Mark M 19
Please input information of NO.3 student: 05 Jolson M 19
The linked list of students: 01 kitty F 20  04 Mark M 19  05 Jolson M 19
Please input the age of student to delete: 20
Deleted Linked list of students: 04 Mark M 19  05 Jolson M 19