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

#define MAX_STUDENTS 100

typedef struct {
    int id;
    char name[50];
    float gaoshu;
    float wuli;
    float yingyu;
} Student;

Student students[MAX_STUDENTS];
int studentCount = 0;

void addStudent() {
	printf("You are trying to Input info\n");
    if (studentCount >= MAX_STUDENTS) {
        printf("Cannot add more students. Maximum limit reached.\n");
        return;
    }
    Student newStudent;
    printf("Enter ID: ");
    scanf("%d", &newStudent.id);
    printf("Enter Name: ");
    scanf("%s", newStudent.name);
    printf("Enter 高数成绩: ");
    scanf("%f", &newStudent.gaoshu);
    printf("Enter 物理成绩: ");
    scanf("%f", &newStudent.wuli);
    printf("Enter 英语成绩: ");
    scanf("%f", &newStudent.yingyu);

    students[studentCount++] = newStudent;
    printf("Student added successfully!\n");
}

void deleteStudent() {
    int id;
    printf("You are trying to Output info\n");
    printf("Enter ID of the student to delete: ");
    scanf("%d", &id);

    for (int i = 0; i < studentCount; i++) {
        if (students[i].id == id) {
            for (int j = i; j < studentCount - 1; j++) {
                students[j] = students[j + 1];
            }
            studentCount--;
            printf("Student deleted successfully!\n");
            return;
        }
    }

    printf("Student not found!\n");
}

void displayStudents() {
	printf("You are trying to Make things ordered\n");
    if (studentCount == 0) {
        printf("No students to display.\n");
        return;
    }

    printf("ID\tName\t高数成绩\t物理成绩\t英语成绩\t总成绩\n");
    for (int i = 0; i < studentCount; i++) {
        printf("%d\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f\n", students[i].id, students[i].name, students[i].gaoshu,students[i].wuli,students[i].yingyu,students[i].gaoshu+students[i].wuli+students[i].yingyu);
    }
}

int main() {
    int choice;
    int running = 1; // 控制循环的变量

    while (running) { printf("输入1，2，3，4使用对应功能\n");
        printf("							   1. Input\n");
        printf("                               2. Output\n");
        printf("                               3. Order\n");
        printf("                               4. Quit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                deleteStudent();
                break;
            case 3:
                displayStudents();
                break;
            case 4:
                running = 0; // 设置为0以退出循环
                break;
            default:
                printf("Wrong input.\n");
        }
    }

    return 0;
}