#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;
    int banji;
} Student;

Student students[MAX_STUDENTS];
int studentCount = 0;

void addStudent() {
	char panduan;
	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 Class: ");
    scanf("%d",&newStudent.banji);
    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");
    printf("continue?");
	
}

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 selectStudent(){
	int xuan;
	printf("Input Id or Class:");
	scanf("%d",&xuan);
	 for (int i = 0; i < studentCount; i++) {
	 	if(xuan==students[i].id||xuan==students[i].banji)
	 	{
	 		printf("%d\t%s\t%d\t%.2f\t%.2f\t%.2f\t%.2f\n", students[i].id, students[i].name, students[i].banji,students[i].gaoshu,students[i].wuli,students[i].yingyu,students[i].gaoshu+students[i].wuli+students[i].yingyu);
		}
	}
	printf("continue?");
}

void orderStudents() {
    int i, j;
    Student temp;
    for (i = 0; i < studentCount - 1; i++) {
        for (j = i + 1; j < studentCount; j++) {
            if (students[i].banji > students[j].banji) {
                temp = students[i];
                students[i] = students[j];
                students[j] = temp;
            } 
            else if (students[i].banji == students[j].banji) {
                float totalScoreI = students[i].gaoshu + students[i].wuli + students[i].yingyu;
                float totalScoreJ = students[j].gaoshu + students[j].wuli + students[j].yingyu;
                if (totalScoreI < totalScoreJ) {
                    temp = students[i];
                    students[i] = students[j];
                    students[j] = temp;
                }
            }
        }
    }
    printf("ID\tName\t班级\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%d\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f\n", students[i].id, students[i].name, students[i].banji,students[i].gaoshu,students[i].wuli,students[i].yingyu,students[i].gaoshu+students[i].wuli+students[i].yingyu);
    }
}

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班级\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%d\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f\n", students[i].id, students[i].name, students[i].banji,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, 5, 6使用对应功能\n");
        printf("                               1. Input\n");
        printf("                               2. Output\n");
        printf("                               3. select\n");
        printf("                               4. order\n");
        printf("                               5. output\n");
        printf("                               6. Quit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        char panduan[3];
        

        switch (choice) {
            case 1:
                addStudent();
                loop:
				scanf("%s",panduan);
                if(strcmp(panduan,"yes")==0)
                {
                	addStudent();
                	goto loop;
				}
				else 
				break;
            case 2:
                deleteStudent();
                scanf("%s",panduan);
                if(strcmp(panduan,"yes")==0)
                {
                	deleteStudent();
				}
				else 
				break;
			case 3:
				selectStudent();
				loop3:
				scanf("%s",panduan);
                if(strcmp(panduan,"yes")==0)
                {
                	selectStudent();
                	goto loop3;
				}
				else 
				break;
			case 4:
				orderStudents();
				break;
            case 5:
                displayStudents();
                break;
            case 6:
                running = 0; 
                break;
            default:
                printf("Wrong input.\n");
        }
    }

    return 0;
}
        }
    }

    return 0;
}