#include <stdio.h>
//定义结构组 
typedef struct {
    int student_id;
    float math_grade;
    float physics_grade;
    float english_grade;
    float total_grade;
} Student;

//录入学生信息 
void inputInfo() {
    printf("Please input info of the three students:\n");

    Student students[3];

    for (int i = 0; i < 3; i++) {
        //其实有printf注明以下正在录入的信息是什么更好  
        //printf("ID"); 
        scanf("%d", &students[i].student_id);
        //printf("math grade");
        scanf("%f", &students[i].math_grade);
        //printf("physics grade");
        scanf("%f", &students[i].physics_grade);
        //printf("english grade");
        scanf("%f", &students[i].english_grade);

        students[i].total_grade = students[i].math_grade + students[i].physics_grade + students[i].english_grade;

    }

    // 排序 
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 2 - i; j++) {
            if (students[j].total_grade > students[j + 1].total_grade) {
            
                Student temp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = temp;
            }
        }
    }

    //输出学号  高数  物理  英语  总成绩 
    for (int i = 0; i < 3; i++) {
        printf("%d  %.1f  %.1f  %.1f  %.1f\n", students[i].student_id, students[i].math_grade,students[i].physics_grade,students[i].english_grade,students[i].total_grade);
    }
}

void outputInfo() {
    printf("You are trying to Output info.\n");
}

void makeOrdered() {
    printf("You are trying to Make things ordered.\n");
}

//菜单 
int main() {
    char choice;

    printf("Main Menu:\n");
    printf("%30s 1.Input\n", "");
    printf("%30s 2.Output\n", "");
    printf("%30s 3.Order\n", "");
    printf("%30s 4.Quit\n", "");
    printf("Please enter your choice: ");
    scanf(" %c", &choice);

//选择 
    switch (choice) {
        case 'i':
            inputInfo();
            break;
        case 'o':
            outputInfo();
            break;
        case 'm':
            makeOrdered();
            break;
        case 'q':
            printf("You are about to Quit.\n");
            break;
        default:
            printf("Wrong input.\n");
            break;
    }

    return 0;
}