Build a struct with a struct inside - c

Question

typedef struct Course {
char *CourseID;
char *CourseName;
struct Course* next;
} COURSE;
typedef struct Student{
int ID;
struct Student* next
}STUDENT;
I want to build a list of courses and then a list of students with the following
each student has an ID and some courses from the courses list and a grade of each course.
but how can I make that declaration inside the STUDENT struct? I cant understand that
For example
Student: 3049583222
Course: Biology (from course list)
grade: 30
and so on, every student could have all courses from the list.

Answer 1

My idea:
Linked List of Students.
Every student has a linked list of its courses with the grade.
The linked list elements have a pointer to the detailed course description.
// Description of a course
typedef struct Course {
char *CourseID;
char *CourseName;
} COURSE;
// Struct to hold the students grade, as a linked list to generate a list of all courses the student has.
typedef struct coursesTaken {
int grade;
COURSE* courseDescription;
struct coursesTaken* nextCourse;
} COURSES_TAKEN;
// The student with ID and pointer to his first course.
typedef struct Student{
int ID;
COURSES_TAKEN* firstCourse;
struct Student* next;
}STUDENT;

Answer 2

There can be multiple ways to do that, below shown are two approaches.
You can pick one and build on it.
typedef struct Course {
char *CourseID;
char *CourseName;
struct Course* next;
} COURSE;
typedef struct Student{
int ID;
}STUDENT;
//approach 1
#define NIDS 10
#define NCOURSES 20
typedef struct Student_Course_1{
STUDENT STU_ID[NIDS]; /* to store list of student ids */
COURSE STU_Courses[NCOURSES]; /* to store list of courses */
}COURSES_OF_STUDENT_1;
//approach 2
typedef struct Student_Course_2{
STUDENT STU_ID;
COURSE STU_Courses;
}COURSES_OF_STUDENT_2;
int main()
{
COURSES_OF_STUDENT_1 cs1; /* this has list of students and courses inside it */
COURSES_OF_STUDENT_2 cs2[NIDS]; /* you can use NIDS list of students and courses info with this */
return 0;
}