帮我用c语言链表写一个会员管理系统，可以添加、删除、修改和根据会员账号排序会员列表，进行充值和消费，会员信息包括账号 姓名 电话号码 余额 是否挂失，并可以根据姓名 账号 电话号码其中一个信息查询到该会员其他信息。

好的，以下是一个简单的会员管理系统的C语言链表实现：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// 定义会员结构体
typedef struct member {
    char account[20];  // 账号
    char name[20];     // 姓名
    char phone[20];    // 电话号码
    float balance;     // 余额
    int lost;          // 是否挂失，0表示未挂失，1表示已挂失
    struct member *next;  // 指向下一个会员的指针
} Member;

// 创建一个新的会员
Member *create_member(char *account, char *name, char *phone, float balance, int lost) {
    Member *new_member = (Member *)malloc(sizeof(Member));
    strcpy(new_member->account, account);
    strcpy(new_member->name, name);
    strcpy(new_member->phone, phone);
    new_member->balance = balance;
    new_member->lost = lost;
    new_member->next = NULL;
    return new_member;
}

// 添加一个会员到链表中
void add_member(Member **head, Member *new_member) {
    if (*head == NULL) {
        *head = new_member;
    } else {
        Member *current = *head;
        while (current->next != NULL) {
            current = current->next;
        }
        current->next = new_member;
    }
}

// 根据账号查找会员
Member *find_member_by_account(Member *head, char *account) {
    Member *current = head;
    while (current != NULL) {
        if (strcmp(current->account, account) == 0) {
            return current;
        }
        current = current->next;
    }
    return NULL;
}

// 根据姓名查找会员
Member *find_member_by_name(Member *head, char *name) {
    Member *current = head;
    while (current != NULL) {
        if (strcmp(current->name, name) == 0) {
            return current;
        }
        current = current->next;
    }
    return NULL;
}

// 根据电话号码查找会员
Member *find_member_by_phone(Member *head, char *phone) {
    Member *current = head;
    while (current != NULL) {
        if (strcmp(current->phone, phone) == 0) {
            return current;
        }
        current = current->next;
    }
    return NULL;
}

// 根据账号删除会员
void delete_member(Member **head, char *account) {
    Member *current = *head;
    Member *previous = NULL;
    while (current != NULL) {
        if (strcmp(current->account, account) == 0) {
            if (previous == NULL) {
                *head = current->next;
            } else {
                previous->next = current->next;
            }
            free(current);
            return;
        }
        previous = current;
        current = current->next;
    }
}

// 修改会员信息
void modify_member(Member *member, char *name, char *phone, float balance, int lost) {
    strcpy(member->name, name);
    strcpy(member->phone, phone);
    member->balance = balance;
    member->lost = lost;
}

// 根据余额排序会员列表
void sort_members_by_balance(Member **head) {
    if (*head == NULL || (*head)->next == NULL) {
        return;
    }
    Member *current = *head;
    Member *previous = NULL;
    while (current != NULL) {
        if (previous != NULL && current->balance < previous->balance) {
            previous->next = current->next;
            current->next = previous;
            if (previous == *head) {
                *head = current;
            } else {
                Member *temp = *head;
                while (temp->next != previous) {
                    temp = temp->next;
                }
                temp->next = current;
            }
            current = previous;
        }
        previous = current;
        current = current->next;
    }
}

// 显示会员列表
void display_members(Member *head) {
    printf("账号\t姓名\t电话号码\t余额\t是否挂失\n");
    Member *current = head;
    while (current != NULL) {
        printf("%s\t%s\t%s\t%.2f\t%s\n", current->account, current->name, current->phone, current->balance, current->lost ? "是" : "否");
        current = current->next;
    }
}

int main() {
    Member *head = NULL;
    add_member(&head, create_member("1001", "张三", "13812345678", 100.0, 0));
    add_member(&head, create_member("1002", "李四", "13987654321", 200.0, 0));
    add_member(&head, create_member("1003", "王五", "13611112222", 50.0, 1));
    display_members(head);
    printf("\n");

    Member *member = find_member_by_account(head, "1002");
    if (member != NULL) {
        modify_member(member, "赵六", "13799998888", 300.0, 0);
    }
    display_members(head);
    printf("\n");

    delete_member(&head, "1003");
    display_members(head);
    printf("\n");

    sort_members_by_balance(&head);
    display_members(head);
    printf("\n");

    Member *found_member = find_member_by_name(head, "张三");
    if (found_member != NULL) {
        printf("账号：%s，电话号码：%s，余额：%.2f，是否挂失：%s\n", found_member->account, found_member->phone, found_member->balance, found_member->lost ? "是" : "否");
    }

    return 0;
}

这个会员管理系统使用链表来存储会员信息，可以添加、删除、修改会员信息，根据账号、姓名、电话号码查询会员信息，根据余额排序会员列表。