请使用c语言完成以下功能的代码 （1）假设每个同学【学号为 9122001--9122100】有三门成绩 请随机生成 100 个同学成绩(成绩要求在 10-100 之间) (2) 将 100 个同学的学号成绩以二进制的形式保存在文件 b.dat 中。 (3) 再次从 b.dat 文件中依次读出各学生成绩，如果发现有学生成绩<60 分，则将该科目 成绩改为 0，保存回去，并打印该学生成绩。

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

#define NUM_STUDENTS 100
#define NUM_SUBJECTS 3
#define MIN_SCORE 10
#define MAX_SCORE 100

struct Student {
    int id;
    int scores[NUM_SUBJECTS];
};

void generate_students(struct Student *students) {
    for (int i = 0; i < NUM_STUDENTS; i++) {
        students[i].id = 9122001 + i;
        for (int j = 0; j < NUM_SUBJECTS; j++) {
            students[i].scores[j] = rand() % (MAX_SCORE - MIN_SCORE + 1) + MIN_SCORE;
        }
    }
}

void save_students_binary(const struct Student *students) {
    FILE *fp = fopen("b.dat", "wb");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        return;
    }
    for (int i = 0; i < NUM_STUDENTS; i++) {
        fwrite(&(students[i]), sizeof(struct Student), 1, fp);
    }
    fclose(fp);
}

void print_student(const struct Student *student) {
    printf("Student ID: %d\n", student->id);
    for (int i = 0; i < NUM_SUBJECTS; i++) {
        printf("Subject %d: %d\n", i + 1, student->scores[i]);
    }
}

void read_students_binary(struct Student *students) {
    FILE *fp = fopen("b.dat", "rb+");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        return;
    }
    for (int i = 0; i < NUM_STUDENTS; i++) {
        struct Student student;
        fread(&student, sizeof(struct Student), 1, fp);
        for (int j = 0; j < NUM_SUBJECTS; j++) {
            if (student.scores[j] < 60) {
                student.scores[j] = 0;
            }
        }
        fseek(fp, -sizeof(struct Student), SEEK_CUR);
        fwrite(&student, sizeof(struct Student), 1, fp);
        print_student(&student);
    }
    fclose(fp);
}

int main() {
    srand(time(NULL));
    struct Student students[NUM_STUDENTS];
    generate_students(students);
    save_students_binary(students);
    read_students_binary(students);
    return 0;
}