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

typedef struct Student {
    char id[20];
    char classname[20];
    char name[20];
    float score1, score2, score3;
    struct Student* next;
} Student;

Student* head = NULL; // 头节点指针

void showMenu() {
    printf("%30s1. input\n", " ");
    printf("%30s2. delete\n", " ");
    printf("%30s3. select\n", " ");
    printf("%30s4. order\n", " ");
    printf("%30s5. output\n", " ");
    printf("%30s6. quit\n", " ");
    printf("%30splease input your option\n", " ");
}

void insertStudent() {
    Student* newStudent = (Student*)malloc(sizeof(Student));
    printf("ID: ");
    scanf("%s", newStudent->id);
    printf("class: ");
    scanf("%s", newStudent->class);
    printf("name: ");
    scanf("%s", newStudent->name);
    printf("score1: ");
    scanf("%f", &newStudent->score1);
    printf("score2: ");
    scanf("%f", &newStudent->score2);
    printf("score3: ");
    scanf("%f", &newStudent->score3);
    newStudent->next = head;
    head = newStudent;
}

void deleteStudent() {
    char idOrName[20];
    scanf("%s", idOrName);
    Student* current = head;
    Student* prev = NULL;
    while (current != NULL) {
        if (strcmp(current->id, idOrName) == 0 || strcmp(current->name, idOrName) == 0) {
            if (prev == NULL) {
                head = current->next;
            } else {
                prev->next = current->next;
            }
            free(current);
            break;
        }
        prev = current;
        current = current->next;
    }
    printStudent();
}

void selectStudent() {
    char idOrName[20];
    scanf("%s", idOrName);
    Student* current = head;
    int found = 0;
    while (current != NULL) {
        if (strcmp(current->id, idOrName) == 0 || strcmp(current->name, idOrName) == 0) {
            printf("%s %s %s %.1f %.1f %.1f\n", current->id, current->class, current->name, current->score1, current->score2, current->score3);
            found = 1;
        }
        current = current->next;
    }
    if (found == 0) {
        printf("There is no eligible student\n");
    }
}

void orderStudent() {
    // 省略排序功能的具体实现
}

void printStudent() {
    Student* current = head;
    while (current != NULL) {
        printf("%s %s %s %.1f %.1f %.1f\n", current->id, current->class, current->name, current->score1, current->score2, current->score3);
        current = current->next;
    }
}

int main() {
    int choice;
    char a[4];
    while (1) {
        showMenu();
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                insertStudent();
                while (1) {
                    printf("Continue?\n");
                    scanf("%s", &a);
                    if (strcmp(a, "yes") == 0) {
                        insertStudent();
                        continue;
                    } else {
                        break;
                    }
                }
                break;
            case 2:
                deleteStudent();
                while (1) {
                    printf("Continue?\n");
                    scanf("%s", &a);
                    if (strcmp(a, "yes") == 0) {
                        deleteStudent();
                        continue;
                    } else {
                        break;
                    }
                }
                break;
            case 3:
                selectStudent();
                while (1) {
                    printf("Continue?\n");
                    scanf("%s", &a);
                    if (strcmp(a, "yes") == 0) {
                        selectStudent();
                        continue;
                    } else {
                        break;
                    }
                }
                break;
            case 4:
                orderStudent();
                break;
            case 5:
                printStudent();
                break;
            case 6:
                return 0;
        }
    }
}